http://espace.library.uq.edu.au/ The University of Queensland en Fez http://blogs.law.harvard.edu/tech/rss http://espace.library.uq.edu.au/view/UQ:149907 2008-06-06T00:00:00Z Kojovic, T. og Pax, R. A. og Holtham, P. N. http://espace.library.uq.edu.au/view/UQ:72364 2007-08-14T00:00:00Z Holtham, P N http://espace.library.uq.edu.au/view/UQ:269316 2012-03-08T09:32:34Z Gerson, A. R. og Smart, R. St. C. og Li, J. og Kawashima, N. og Weedon, D. og Triffett, B og Bradshaw, D. http://espace.library.uq.edu.au/view/UQ:161717 A hydrocyclone with two concentric vortex finders, named the three-product cyclone, has been successfully tested in the Platinum industry for classifying UG2 ore which contains a high density chromite and a low density PGM carrying silica component. The low density silica reports to the overflow even when not sufficiently fine enough for flotation, which results in loss of recovery through over-size silica component material in the float feed. Results from industrial plant trials conducted using a 600 mm diameter three-product cyclone are presented. The three-product cyclone produced a middlings product containing the majority of the oversize silica that would normally report to the overflow. The middlings from the three-product cyclone represents a small percentage of the total cyclone feed and can be treated separately by fine screening to return the coarse silica to the mill for further grinding 2009-01-27T00:00:00Z Mainza, A. og Powell, M. S. og Knopjes, B. http://espace.library.uq.edu.au/view/UQ:268612 A three-layer model for digital communication in a mine is proposed. Two basic platforms are discussed: A uniform transmission network and a uniform data warehouse. An actual, ControlNet based, transmission network platform suitable for the Jining No.3 coal mine is presented. This network is an information superhighway intended to integrate all existing and new automation subsystems. Its standard interface can be used with future subsystems. The network, data structure and management decision-making all employ this uniform hardware and software. This effectively avoids the problems of system and information islands seen in traditional mine-automation systems. The construction of the network provides a stable foundation for digital communication in the Jining No.3 coal mine. 2012-02-28T00:00:00Z Chen, Jin-Yun og Zhang, Shen og Zuo, Weiran http://espace.library.uq.edu.au/view/UQ:189510 2009-12-09T00:00:00Z Genc, O. og Benzer, H. http://espace.library.uq.edu.au/view/UQ:199736 Azo-dyes that are characterized by the presence of the -N=N- azo-linkage, comprise around half of all textile colorants used today. They are required to exhibit a high degree of chemical, photolytic and microbiological stability in order to fulfill the fastness requirements of customers. Consequently, dyes do not readily degrade under typical usage conditions, not even under aerobic conditions prevailing in the conventional biological treatment processes. Wastewater treatment facilities that received azo-dyes have shown to be unable to meet color standards. It is of strong interest to develop fast, efficient, economical and environmentally friendly technology for removing dyes from wastewater. The carried out fundamental studies shown that the application of iron type catalysts could be the efficient and low cost solution. The performed studies were concentrated on decomposition kinetics of the most typical industrial dyes in different conditions: solution concentration, pH, reduction/oxidation potential. Degradation mechanisms of different dyes were also investigated. 2010-03-18T00:00:00Z Atenas, G. M. og Mielczarski, E. og Mielczarski, J. A. og Lambert, J. og Ehrhardt, J. -J. http://espace.library.uq.edu.au/view/UQ:161761 2009-01-27T00:00:00Z Walters, Stephen og Skrzeczynski, Bob og Whiting, Tom og Bunting, Frank og Arnold, Gary http://espace.library.uq.edu.au/view/UQ:162599 2009-02-02T00:00:00Z Khanal, M. og Raghuramakrishnan, R. og Tomas, J. http://espace.library.uq.edu.au/view/UQ:187570 This paper investigates ore abrasion resistance using a small tumbling mill. Three kilograms of different size fractions of ore are tumbled in a 300-mm diameter by 300-mm length mill for varying times. The effect of particle size, milling time and stiffness of particles on abrasion characteristics were studied. As might be expected, the grinding time affects the degree of abrasion of particles. Longer grinding times produce more fragments. The size and stiffness of particles also affect the degree of abrasion. For the same quantity of mass, smaller particles (more in number) show more collisions and, hence, a higher probability of abrasion. 2009-11-23T00:00:00Z Khanal, Manoj og Morrison, Rob http://espace.library.uq.edu.au/view/UQ:162581 2009-02-02T00:00:00Z Khanal, M. og Morrison, R. D. http://espace.library.uq.edu.au/view/UQ:133451 The discrete element code PFC3D has been used to model lifter stresses within a large tumbling mill. The intensity of the induced stresses (shear and normal) is directly proportional to the intensity of lifting action and liner/lifter wear. Results show that, for the modelled case, the magnitude of the stresses decreases as the number of lifters increase. Hence, longer intervals between relining can be expected for a mill with a larger number of lifters. However, it appears that beyond a critical number, a further increase in the number of lifters will not result in significant further reduction of stress. Distribution of the impact energy is also affected by the number of lifters. With very few lifters, the dominant form of energy consumption will be low intensity abrasion events. With larger numbers of lifters, high intensity impacts will be more frequent. Net power draw will be at a minimum for very small numbers of active lifters. As the number of lifters increases, power draw increases and eventually reaches a relatively value. Further work will be required to investigate the effect of lifter shape on the induced stresses. It appears to be possible to determine the number and shape of lifters that will result in the optimal power draw, while simultaneously minimising liner/lifter wear. 2008-03-28T00:00:00Z Djordjevic, N. http://espace.library.uq.edu.au/view/UQ:64776 The power required to operate large mills is typically 5-10 MW. Hence, optimisation of power consumption will have a significant impact on overall economic performance and environmental impact. Power draw modelling results using the discrete element code PFC3D have been compared with results derived from the widely used empirical Model of Morrell. This is achieved by calculating the power draw for a range of operating conditions for constant mill size and fill factor using two modelling approaches. fThe discrete element modelling results show that, apart from density, selection of the appropriate material damping ratio is critical for the accuracy of modelling of the mill power draw. The relative insensitivity of the power draw to the material stiffness allows selection of moderate stiffness values, which result in acceptable computation time. The results obtained confirm that modelling of the power draw for a vertical slice of the mill, of thickness 20% of the mill length, is a reliable substitute for modelling the full mill. The power draw predictions from PFC3D show good agreement with those obtained using the empirical model. Due to its inherent flexibility, power draw modelling using PFC3D appears to be a viable and attractive alternative to empirical models where necessary code and computer power are available. 2007-08-14T00:00:00Z Djordjevic, N. http://espace.library.uq.edu.au/view/UQ:64584 Crushing and grinding are the most energy intensive part of the mineral recovery process. A major part of rock size reduction occurs in tumbling mills. Empirical models for the power draw of tumbling mills do not consider the effect of lifters. Discrete element modelling was used to investigate the effect of lifter condition on the power draw of tumbling mill. Results obtained with PFC3D code show that lifter condition will have a significant influence on the power draw and on the mode of energy consumption in the mill. Relatively high lifters will consume less power than low lifters, under otherwise identical conditions. The fraction of the power that will be consumed as friction will increase as the height of the lifters decreases. This will result in less power being used for high intensity comminution caused by the impacts. The fraction of the power that will be used to overcome frictional resistance is determined by the material's coefficient of friction. Based on the modelled results, it appears that the effective coefficient of friction for in situ mill is close to 0.1. (C) 2003 Elsevier Science Ltd. All rights reserved. 2007-08-14T00:00:00Z Djordjevic, N. http://espace.library.uq.edu.au/view/UQ:272206 2012-04-03T00:00:00Z Tungpalan, Djoan og Mendoza, H. http://espace.library.uq.edu.au/view/UQ:246388 2011-08-25T00:00:00Z Mohammadkhani, M. og Noaparast, M. og Shafaei, S. Z. og Amini, A. og Amini, E. og Abdollahi, H. http://espace.library.uq.edu.au/view/UQ:277667 2012-07-17T00:00:00Z Ballantyne, Grant og Hilden, Marko og Powell, Malcolm http://espace.library.uq.edu.au/view/UQ:197398 2010-03-02T00:00:00Z Forbes, G. R. og de Jager, G. og Bradshaw, D. J. http://espace.library.uq.edu.au/view/UQ:149877 2008-06-06T00:00:00Z Djordjevic, N. og Brunton, I. og Cepuritis, P. og Chitombo, G. P. og Heslop, G. http://espace.library.uq.edu.au/view/UQ:192341 Talc is a magnesium rich phylosilicate mineral that occurs as a gangue component of many base metal sulfide ore deposits around the world. The basal planes of talc are naturally hydrophobic and therefore talc is highly floatable. In order to reduce talc floatability, polymeric depressants such carboxymethyl cellulose (CMC) are commonly utilised. Typical depressants are natural cellulose based polymers such Depramin®, produced by Akzo Nobel. This paper examines the adsorption characteristics of a charged polymeric depressant (CMC) on the basal planes of New York talc using surface specific ToF-SIMS measurements. The effect of the presence of calcium ions in solution on the adsorption density of charged polymers is also studied. The adsorption density of CMC was measured both in the presence and absence of calcium ions in solution. It was found that the presence of calcium greatly enhanced the adsorption density of the polymer. This was attributed to the increased concentration of CaOH+ ions on the mineral surface, which facilitated polymer adsorption though acid/base interactions. The enhanced adsorption density was also attributed to the increased amount of coiling of the CMC macromolecules due to their reaction with Ca2+ ions. 2010-01-13T00:00:00Z Burdukova, E. og Van Leerdam, G. C. og Prins, F. E. og Smeink, R. G. og Bradshaw, D. J. og Laskowski, J. S. http://espace.library.uq.edu.au/view/UQ:282993 The reactivity of clay minerals and variety of these reactions are greater than any other known colloidal material. While it is acknowledged that clay minerals can cause problems in mineral flotation, the literature contains conflicting evidence, particularly with respect to the effect of clays on froth stability. It is well known that achieving and maintaining optimum froth stability is an influential factor in determining froth flotation performance. However, the presence of clay minerals in the ore is a major challenge to obtaining a stable froth. In fact, clay minerals could reduce froth flotation performance by both decreasing or increasing froth stability. The mechanism by which clay minerals affect froth stability is not fully understood and needs to be investigated further. In order to improve flotation performance, reliable knowledge of the effect of clay minerals on froth stability is essential which is discussed in this paper. 2012-10-08T13:54:53Z Farrokhpay, Saeed og Bradshaw, Dee J. http://espace.library.uq.edu.au/view/UQ:192346 The rheology of mineral suspensions is highly dependent on the relationship between the mineral surface properties and inter-particle interactions as described by Derjaguin, Landau, Verwey and Overbeek (DLVO) theory. In this paper, the rheological properties of mineral suspensions are used to study the differences in behaviour of anisotropic talc and isotropic zircon minerals as a function of pH and polymer dosage (carboxymethyl cellulose, CMC). It was found that the rheological tests when carried out in parallel with electrophoretic or point of zero charge measurements clearly reveal differences between the behaviour of the suspensions of isotropic and anisotropic minerals. These differences are further accentuated with the addition of CMC. 2010-01-13T00:00:00Z Burdukova, K. og Bradshaw, D. J. og Laskowski, J. S. http://espace.library.uq.edu.au/view/UQ:197501 2010-03-03T00:00:00Z Burdukova, E. og Bradshaw, D. J. og Laskowski, J. S. http://espace.library.uq.edu.au/view/UQ:261983 2011-11-22T15:50:09Z Nurdina, A. K. og Mariatti, M. og Samayamutthirian, P. http://espace.library.uq.edu.au/view/UQ:262046 2011-11-24T00:00:00Z Hashim, Syed Fuad Saiyid og Musa, F. og Azizli, Khairun Azizi Mohd og Palaniandy, Samayamutthirian og Hussin, Hashim http://espace.library.uq.edu.au/view/UQ:59095 A study was undertaken to determine the effects of five industrial frothers on the relationship between entrainment recovery and water recovery. The experiments were conducted using a Batequip rectangular 60-L steel flotation cell that was run in parallel with the first cell in a copper/silver prefloat rougher circuit. The concentration of the frothers ranged from 2.5 to 8.4 g/t. The experiments were repeated at three different froth depths. A power function was found to fit this relationship with no discontinuity in the relationship caused by the changes in frother type and concentration and froth depth. 2007-08-14T00:00:00Z Rahal, K og Manlapig, E og Franzidis, JP http://espace.library.uq.edu.au/view/UQ:283008 Main portion of water in mineral processing plants is recovered in thickeners. The required surface area for thickeners is calculated based on the Coe and Clevenger theory where it is assumed, when no flocculants used, the settling velocity of particles in each layer in the free settling region is only a function of solids concentration in that layer. In this study, the effect of mode of flocculation, defined as the initial solids concentration where the floes first formed, on their settling velocity was investigated using batch settling tests. The pulps used for settling tests were prepared by two different methods to arrive at equal solids concentration. The methods were the standard procedure of adding solids to a known amount of liquid and decantation. The latter method made the change of mode of flocculation possible by decanting the dilute suspensions to obtain higher solids content pulps. Results of all settling tests (with and without flocculant) on copper, iron, lead and zinc ores, and coal suspensions showed that, unlike the Coe and Clevenger theory, the settling velocity of particles in any layer even in the free settling region is affected by solids content of the suspension where floes were first formed. For instance, the settling velocity of a layer of iron ore tailing with 22% solids in a flocculated (5 g/t) suspension varied from 1 .32 to 2. 73 em/min when the initial feed solids varied from 5 to 20%. Furthermore it was shown that the settling velocities of suspensions with equal solids content prepared by the two methods were different owing to the significant difference in their floes structures. It was concluded that the settling tests performed to determine the required surface area for thickening should be carried out etther on the single sample with the solids concentration of the thickener feed (after dilution if it is diluted) or on decanted samples. The conventional procedure of measuring settling velocities in various percent solids between the feed and the desired underflow is prone to large errors. 2012-10-08T15:23:17Z Parsapour, G. H. A. og Hossininasab, M. og Yahyaei, Mohsen og Banisi, S. http://espace.library.uq.edu.au/view/UQ:272598 2012-04-12T00:00:00Z Resabal, Vannie og Ohtsuka, T. http://espace.library.uq.edu.au/view/UQ:261953 2011-11-22T00:00:00Z Palaniandy, Samayamutthirian og Azizli, Khairun Azizi Mohd og Hussin, Hashim og Hashim, Syed Fuad Saiyid http://espace.library.uq.edu.au/view/UQ:74849 Froth recovery measurements have been conducted in both the presence (three-phase froth) and absence (two-phase froth) of particles of different contact angles in a specially modified laboratory flotation column. Increasing the particle hydrophobicity increased the flow rate of particles entering the froth, while the recovery of particles across the froth phase itself also increased for particle contact angles to 63 and at all vertical heights of the froth column. However, a further increase in the contact angle to 69 resulted in lower particle recovery across the froth phase. The reduced froth recovery for particles of 69 contact angle was linked to significant bubble coalescence within the froth phase. The reduced froth recovery occurred uniformly across the entire particle size range, and was, presumably, a result of particle detachment from coalescing bubbles. Water flow rates across the froth phase also varied with particle contact angle. The general trend was a decrease in the concentrate flow rate of water with increasing particle contact angle. An inverse relationship between water flow rate and bubble radius was also observed, possibly allowing prediction of water flow rate from bubble size measurements in the froth. Comparison of the froth structure, defined by bubble size, gas hold-up and bubble layer thickness, for two- and three-phase froths, at the same frother concentration, showed there was a relationship between water flow rate and froth structure. (c) 2005 Elsevier B.V. All rights reserved. 2007-08-15T00:00:00Z Schwarz, S og Grano, S http://espace.library.uq.edu.au/view/UQ:261952 2011-11-22T00:00:00Z Ahmad, Farrah Noor og Mariatti, Jaafar og Palaniandy, Samayamutthirian og Azizli, Khairun Azizi Mohd http://espace.library.uq.edu.au/view/UQ:284425 At Newcrest's Telfer gold mine, a strategy of regrinding pyrite rougher flotation concentrates has been proposed to incr ease gold recovery and reduce cyanide consumption in the CIL circuit. The r egrinding will be followed by an additional copper/ gold flotation stage, where copper minerals need to be separated from pyrite. However, although the minerals are well liberated, the separation of chalcopyrite from pyrite in the cleaner stage is not always straightforward. The surfaces of the fine particles, produced during regrinding, are more easily oxidised and contaminated than coarse particles, directly influencing the particle floatability. The depression of pyrite is difficult in the cleaner stage as well due to copper activation, a process which is also highly dependent on the grinding environment. In this study, different grinding media, including mild steel and stainless steel, was used in the regrinding to prod uce different regrinding chemistry, such as, pH, Eh, and iron hydr oxide contamination. The effects of regrinding conditions on chalcopyrite flotation and its separation from pyrite were studied. It was found that the stainless steel grinding media, which produced an oxidising environment, was more beneficial for the separation of chalcopyrite from pyrite after regrinding. The mild steel grinding media had a detrimental effect on both chalcopyrite and pyrite flotation. This study addresses the importance of choosing suitable regrinding conditions in the pyrite and copper flotation circuit. 2012-11-06T00:00:00Z Chen, X. og Peng, Y. og Bradshaw, D. J. http://espace.library.uq.edu.au/view/UQ:282980 In this study, the effect of different regrinding conditions on the depression of fine pyrite at the cleaner stage was investigated. The regrinding condition was manipulated by different grinding media (stainless steel and mild steel). It was found that, after regrinding with mild steel grinding media, the flotation recovery of pyrite is much lower than with stainless steel grinding media, and it is more difficult to restore by adding more collector. This means, regrinding with mild steel grinding media may depress the pyrite flotation more strongly. The copper activation of pyrite during regrinding was also studied. It was found, that the mild steel grinding media is more beneficial to copper activation than stainless steel media. Additionally, the analysis of pyrite recovery based on the particle size indicated, that the fine particles are more susceptible to different grinding environments than intermediate and coarse particles and therefore are more easily depressed with a much lower flotation recovery. 2012-10-08T12:01:15Z Chen, Xumeng og Peng, Yongjun og Bradshaw, Dee J. http://espace.library.uq.edu.au/view/UQ:261982 2011-11-22T00:00:00Z Nurdina, A.K. og Mariatti, M. og Palaniandy, Samayamutthirian http://espace.library.uq.edu.au/view/UQ:295002 Heap leaching is a widely used extraction method for low-grade minerals including nickel and cobalt. Agglomeration of fine mineral particles as a precursor to heap leaching is an important means of enhancing leaching rates and metal recoveries. Single pellet leaching behaviour of three nickel laterite ores: siliceous goethitic (SG), goethitic (G) and saprolitic (SAP) was investigated to access the effect of pellet properties (binder type, binder content, porosity and dryness) on its stability, initial leaching rate and maximum Ni recovery. The Ni leaching rate was found to be directly related to the pellet dryness and the highest rate was obtained at an intermediate degree of dryness due to the better wetting and diffusion of acidic lixiviant into the pores in between the particles. Furthermore, in addition to the observation of significant effect of porosity and binder type on the pellet's mechanical strength, which in turn determines the pellet stability during acid leaching, the ore mineralogy is also noted to play a very important role. 2013-03-27T10:05:34Z Xu, D. og Liu, L. X. og Addai-Mensah, J. og Robinson, D. J. http://espace.library.uq.edu.au/view/UQ:261948 2011-11-22T00:00:00Z Palaniandy, Samayamutthirian og Azizli, Khairun Azizi Mohd og Jaafar, Mariatti og Ahmad, Farrah Noor og Hussin, Hashim og Hashim, Syed Fuad Saiyid http://espace.library.uq.edu.au/view/UQ:162572 2009-02-02T00:00:00Z Khanal, M. og Tomas, J. http://espace.library.uq.edu.au/view/UQ:192815 We have elucidated the effect of oblique excitation and detection on cathodoluminescence (CL) spectra. A new CL system was developed, in which the light collector (detector) is set normal to the electron beam direction (excitation). The direction of excitation and detection was varied by tilting the specimen. CL spectra from free-standing GaN platelet were recorded with various tilt angles. The band edge emission has suffered serious suppression when the detector is set at the horizontal direction. We attributed it to the reabsorption of band edge emission. However, this suppression is not serious for the shallow level and deep level emissions because these lights have not suffered reabsorption effect. The gradual decrease at higher tilt angle may be explained with the geometrical effect of reducing the excitation volume due to oblique specimen surface. These findings suggest that the geometrical factor may give serious modification on the CL spectra when the specimen surface normal is tilted more than 60 degrees from the direction of detector. (c) 2006 Elsevier Ltd. All rights reserved. 2010-01-15T00:00:00Z Sekiguchi, T. og Chandra, M. R. og Yao, Y. Z. og Yuan, X. L. og Tsuji, K. og Kang, J. Y. http://espace.library.uq.edu.au/view/UQ:264357 2012-01-03T00:00:00Z Cruz, Nestor og Briens, Cedric og Berruti, Franco http://espace.library.uq.edu.au/view/UQ:252902 In flotation, the froth structure and froth stability are known to playa significant role in determining the mineral concentrate grade and recovery. Froth stability is not only depending on the type and amount of the frother used, but also on the amount and nature of the suspended particles. Furthermore, there are other parameters such as quality of water which are not yet fully understood. In plant practice, the recycling of process water (and very often of water from different sources) to reduce freshwater consumption is increasingly being common. However, using recycled water normally leads to the build-up of salts and surfactants in solution. Therefore, the effect of the process water chemistry on froth stability and more in general on the metallurgical performance, is important. In this study, the effect of water quality, including pH and type and concentration of salts (such as CaCh, AlCl] and NaCl) on froth stability and viscosity was studied. It was found that forth stability was higher in the presence of multivalent metal ions, at concentrations ranging between 15 and 40 mg/L. CaCb and AlCh considerably increased the froth stability (and viscosity). This may be due to bridging effect ofpolyvalent metal ions between the ore particles. 2011-09-22T00:00:00Z Farrokhpay, Saeed og Zanin, Max http://espace.library.uq.edu.au/view/UQ:147612 2008-06-06T00:00:00Z Rong, R. X. og Thonangi, G. og Fulton, T. http://espace.library.uq.edu.au/view/UQ:192263 2010-01-12T00:00:00Z Ekmekçi, Z. og Bradshaw, D. J. og Allison, S. A. og Harris, P. J. http://espace.library.uq.edu.au/view/UQ:192456 To establish a reliable procedure for the characterization of luminescence from nanomaterials, the cathodoluminescence (CL) observation conditions, such as the packing density of particles and the electron beam energy for irradiation, were examined by using ZnO nanoparticles. The evolutions of the intensities and peak position with the accelerating voltage are strongly affected by the packing density of particles. For the low-density specimen, the band edge emission reaches a maximum at 4 kV where the excitation of each nanoparticle becomes the most effective. On the other hand, the position of band edge emission does not shift for low-density specimen while it changes for high-density specimen. Such artifact may bring serious modifications to the CL data. This work suggests that the specimen preparation and the optimum excitation conditions are the keys for the reliable CL characterization of nanomaterials. 2010-01-13T00:00:00Z Dierre, B. og Yuan, X. L. og Obashi, N. og Sekiguchil, T. http://espace.library.uq.edu.au/view/UQ:283006 Dielectrophoresis is a separation technique that uses a non-uniform electrical field to separate particles on the basis of their permittivity. There are many areas of mineral processing that might benefit from the application of dielectrophoresis. These include: coarse removal of gangue, recovery of ultrafine particles, upgrading of flotation concentrates or simply as a laboratory analysis technique. In order to determine the potential value of dielectrophoresis to the mineral processing industry, the response of composite particles was investigated. The electrical properties of composites involve complex relationships between the shape, distribution and permittivity of the individual grains within the rock. The relationship between mineral composition and dielectrophoretic force was measured on single particles from two ore types. The results were used to populate a model that could predict the separation characteristics of the ore. The insights gained from this model separator allowed potential applications of the technology to be examined and their performance evaluated. 2012-10-08T15:14:41Z Ballantyne, Grant og Holtham, Peter N. http://espace.library.uq.edu.au/view/UQ:192421 2010-01-13T00:00:00Z Niitsuma, J. og Sekiguchi, T. og Yuan, X.-L. og Awano, Y. http://espace.library.uq.edu.au/view/UQ:245591 Cold gas dynamic spray (cold spray) is a deposition technology in which particles achieve supersonic velocities. Commercial purity titanium (CP Ti) is directly fabricated to exploit the potential for cold spray to be utilised as a new fabrication technology. Deposition parameters for elimination of porosity were identified. Results show that using helium as the deposition gas has a significant influence on the elimination of pores. The volume fraction of porosity decreased with a decrease in the distance between the nozzle and the substrate. Furthermore, a decrease in average particle size led to a reduction in porosity of the deposited material. The results show that the directly fabricated CP Ti exhibits a higher hardness compared with wrought CP Ti. Optimisation of cold spray parameters led to a significant reduction of pores in directly fabricated parts. 2011-08-15T00:00:00Z Zahiri, Saden H. og Antonio, Christian I. og Jahedi, Mahnaz http://espace.library.uq.edu.au/view/UQ:131178 2008-02-25T00:00:00Z Onederra, I. http://espace.library.uq.edu.au/view/UQ:269710 2012-03-13T00:00:00Z Sadrai, Sepehr og Meech, John A. http://espace.library.uq.edu.au/view/UQ:170339 2009-03-17T00:00:00Z Pokrajcic, Z. http://espace.library.uq.edu.au/view/UQ:269704 2012-03-13T00:00:00Z Sadrai, Sepehr og Meech, John A. og Tromans, Desmond og Sassani, Farrokh