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:202044 2010-04-08T00:00:00Z Micah Nehring og Topal, E. http://espace.library.uq.edu.au/view/UQ:142570 2008-06-10T00:00:00Z Zhang, M. og Reilly, K. og Kelly, P. M. http://espace.library.uq.edu.au/view/UQ:256197 The accuracy of measurement of mechanical properties of a material using instrumented nanoindentation at extremely small penetration depths heavily relies on the determination of the contact area of the indenter. Our experiments have demonstrated that the conventional area function could lead to a significant error when the contact depth was below 40 nm, due to the singularity in the first derivation of the function in this region and thus, the resultant unreasonable sharp peak on the function curve. In this paper, we proposed a new area function that was used to calculate the contact area for the indentations where the contact depths varied from 10 to 40 nm. The experimental results have shown that the new area function has produced better results than the conventional function. 2011-10-16T00:00:00Z Liu, Sheng og Gu, Yuantong og Huang, Han http://espace.library.uq.edu.au/view/UQ:221981 A new type of dissociated misfit dislocation in [001] ZnTe/GaAs strained-layer heterostructures was studied using high-resolution electron microscopy. These dislocations can relieve the localized misfit strain, since they belong to either dissociated screw dislocations and/or partial dislocation dipoles. Their generation depends upon a localized negative strain. © 1998 American Institute of Physics. 2010-11-23T00:00:00Z Han, P. D. og Zou, J. http://espace.library.uq.edu.au/view/UQ:99880 A new zirconium-rich magnesium-zirconium master alloy (designated AM-cast) has been developed by the CRC for Cast Metals Manufacturing in collaboration with Australian Magnesium Corporation for use as a grain refiner for magnesium alloys that do not contain aluminium. This work describes the microstructural characteristics of this new grain refiner and its grain refining ability when added to different magnesium alloys under various conditions (alloying temperature from 680 °C to 750 °C; weight of melt from 1 kg to 150 kg and sample thickness from 7 mm to 62 mm). Owing to its highly alloyable microstructure, AM-cast can be readily introduced into molten magnesium at any temperature when assisted by a few minutes of stirring or puddling. Little sludge has been found at the bottom of the alloying vessel in these trials due to the fine zirconium particles contained in the master alloy. The recovery of zirconium is normally in the range from 40% to 60% with respect to 1% zirconium addition as the master alloy. It is shown that this new master alloy is an excellent grain refiner for aluminium-free magnesium alloys. 2007-08-24T00:00:00Z Qian, Ma og StJohn, D. H. og Frost, M. T. http://espace.library.uq.edu.au/view/UQ:247915 2011-09-08T23:18:55Z McIntyre, T. J. og Eichmann, T. N. og Lourel, I. og Hajek, K. M. og Rubinsztein-Dunlop, H. http://espace.library.uq.edu.au/view/UQ:192457 2010-01-13T00:00:00Z Wang, S. Q. og Huang, H.W. og Shang, Z. T. og Huang, H. og Sheng, S. M. og HQ, M. http://espace.library.uq.edu.au/view/UQ:192484 2010-01-14T00:00:00Z Shang, Z. T. og Huang, H. og Sheng, X. M. og Mi, H. Q. http://espace.library.uq.edu.au/view/UQ:82125 2007-08-15T00:00:00Z Huang, H og Yin, L http://espace.library.uq.edu.au/view/UQ:196636 2010-02-25T00:00:00Z Freebairn, G. S. og Boyce, R. R. og Mudford, N. R. http://espace.library.uq.edu.au/view/UQ:173774 The grinding temperature in the high speed deep grinding of yttria partially stabilized zirconia was measured using the grindable thermocouple technique. Effects of the grinding conditions, including wheel velocity, feed rate and depth of cut, on the temperature were investigated. It was found that the grinding temperature measured under different grinding conditions varied from 100 to 300 °C when the wheel velocity was smaller than 160 m/s. The temperature could rise to about 800 °C at the wheel velocity of 160 m/s. The enhanced resistance of the air barrier formed around the wheel periphery at the higher velocity to the coolant supply was mainly responsible for the temperature rise. 2009-04-03T00:00:00Z Xie, G. Z. og Huang, Han http://espace.library.uq.edu.au/view/UQ:160477 The fracture characteristics of individual abrasive grains such as their strengths and strength distribution are of great importance in grinding process since the shapes of broken abrasive grains which fracture during dressing and grinding heavily influence the surface topography of a grinding wheel. In heavy grinding, the good selfdressing of the grinding wheel makes the cutting edge of abrasive grains sharp to keep the higher stock removal rate this is helpful for lowering the grinding force and the grinding temperature. On the other hand, in precision grinding the tough grains are needed to keep the fine cutting edges generated by very fine dressing. This is because the fracture fragments during grinding will damage the machined surface of the workpiece and lower its surface finish. 2009-01-12T00:00:00Z Huang, Han og Huang, Q. og Zhu, X. H. og Hu, X. Z. http://espace.library.uq.edu.au/view/UQ:175011 2009-04-09T00:00:00Z Rohde, A. og Veidt, M. http://espace.library.uq.edu.au/view/UQ:295438 The present experimental study is to examine the influence of trailing-edge coolant ejection with the span-wise inclination on the aerodynamic loss of turbine nozzle guide vanes. This study uses a cascade of five vanes located in the test section of a low-speed wind tunnel. The vanes have the profile of high-pressure nozzle guide vanes, and the central vane is equipped with the internal cooling and the trailing-edge coolant ejection. The coolant is ejected through trailing-edge slots that are inclined in the span-wise direction at angles varying from 0 deg to 45 deg in 15 deg increments. The results indicate an optimum ejection rate, at which the aerodynamic loss is minimum. There is a little variation in loss as the span-wise inclination is varied when the ratio of coolant to mainstream gas mass flow rate is less than 1.5%. For higher coolant flow rates, however, the loss increases with increases in the span-wise ejection angle. 2013-03-31T15:55:01Z Aminossadati, S. M. og Mee, D. J. http://espace.library.uq.edu.au/view/UQ:202941 Strain hardening of pure copper and friction between the sample and die channels is considered for finite element modelling. To validate the FEM results, the FEM calculated effective strain variations were compared with the hardness measurements. Simulated load-stroke curve and peak load calculations were also compared with the experimentally recorded load-stroke curve and peak load. Different stages of the load-stroke curve of the ECAP process was explained in detail. In over all, good conformity is observed between the FEM calculations and experimental results. 2010-04-14T00:00:00Z Nagasekhar, A.V. og Yoon, S.C. og Tick-Hon, Y. og Kim, H.S. http://espace.library.uq.edu.au/view/UQ:180588 2009-09-03T00:00:00Z Zhao, M.C. og Schmutz, P. og Brunner, S. og Liu, M. og Song, G.L. og Atrens, A. http://espace.library.uq.edu.au/view/UQ:123653 The importance of the invariant line in the development of precipitation crystallography has received increasing recognition. Closed form expressions for the orientation relationship (OR) and the invariant line are available only from two-dimensional models, which cannot yield an invariant line inclined to the rotation axis. This paper presents a set of analytical expressions for the invariant line and the corresponding ORs in various conditions based on a systematic study using a three-dimensional model. If a pair of conjugate planes are parallel with different spacings, the invariant line must lie in these parallel planes. If a pair of conjugate Burgers vectors are parallel with different magnitudes, the interface will contain a set of dislocations alternating with O-lines which are usually inclined to the near-parallel conjugate planes. The distribution of atomic matching in selected interfaces containing the invariant line is also simulated. (c) 2005 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved. 2008-01-25T00:00:00Z Qiu, D og Shen, YX og Zhang, WZ http://espace.library.uq.edu.au/view/UQ:96640 2007-08-24T00:41:46Z Song, G. og Atrens, A. og St John, D. H. http://espace.library.uq.edu.au/view/UQ:2523 Anhydrous magnesium chloride is prepared by a process in which hydrated magnesium chloride (10) is mixed in a vessel (11) with ethylene glycol (12). The mixture (13) is dehydrated in distillation columns (14, 15 and 16) with the dehydrated ethylene glycol magnesium chloride solution (20) pumped into a crystalliser (21) simultaneously with the separate addition of anhydrous ammonia gas (22) to the crystalliser (21). Prior to the introduction of reactants (20 and 22), the crystalliser (21) contains ethylene glycol saturated with ammonia. A crystalliser slurry of magnesium chloride hexammoniate (23) is continuously pumped from the crystalliser (21) into a pressure filter (24) where the crystals are washed with methanol saturated with ammonia (26). The washed crystals (27) are transferred to a fluidised bed calciner (28) where methanol is evaporated from the crystals at 120° C. and thereafter the crystals are calcined to anhydrous magnesium chloride at 450° C. 2006-04-12T00:00:00Z Sheehan, Gregory John og Wong, Fook-Sin og Hourn, Michael Matthew og Kodama, Manabu og Hughes, David http://espace.library.uq.edu.au/view/UQ:226024 2010-12-26T00:00:00Z Shi, ZM og Atrens, A http://espace.library.uq.edu.au/view/UQ:262671 2011-12-01T00:00:00Z Shi, Zhiming og Atrens, Andrej http://espace.library.uq.edu.au/view/UQ:275211 An integral approach has been developed to model propagation of sound through the combustion zone for practical combustors based on the Green’s function technique. Sample calculations done for typical gas turbine combustors indicate that models based on jump conditions across the flame can be quite inaccurate in predicting the acoustic mode shapes (pressure and velocity). There appears to be a strong dependency on the mean temperature profile inside the combustion zone on the final mode shapes of the acoustic quantities. The technique presented herein can be readily adapted to different models for heat release and various temperature profiles. 2012-06-04T00:00:00Z Veeraragavan, A. og Pesala, Balasubrahmanyam og Sujith, R. I. http://espace.library.uq.edu.au/view/UQ:253351 2011-09-27T10:25:07Z Yang, Quangang og Reidsema, Carl http://espace.library.uq.edu.au/view/UQ:287309 Zircons from 14 compositionally variable granitic rocks were examined in detail using CL image-guided micro-analysis to unravel the complex magmatic history above the southward retreating Hellenic subduction zone system in the Aegean Sea. Previously published U-Pb ages document an episodic crystallisation history from 17 to 11 Ma, with peraluminous (S-type) granitic rocks systematically older than closely associated metaluminous (I-type) granitic rocks. Zircon O- and Hf isotopic data, combined with trace element compositions, are highly variable within and between individual samples, indicative of open-system behaviour involving mantle-derived melts and evolved supracrustal sources. Pronounced compositional and thermal fluctuations highlight the role of magma mixing and mingling, in accord with field observations, and incremental emplacement of distinct melt batches coupled with variable degrees of crustal assimilation. In the course of partial fusion, more fertile supracrustal sources dominated in the earlier stages of Aegean Miocene magmatism, consistent with systematically older crystallisation ages of peraluminous granitic rocks. Differences between zircon saturation and crystallisation temperatures (deduced from zircon Ti concentrations), along with multimodal crystallisation age spectra for individual plutons, highlight the complex and highly variable physico-compositional and thermal evolution of silicic magma systems. The transfer of heat and juvenile melts from the mantle varied probably in response to episodic rollback of the subducting lithospheric slab, as suggested by punctuated crystallisation age spectra within and among individual granitic plutons. 2012-12-16T00:13:14Z Bolhar, Robert og Ring, Uwe og Kemp, Anthony I. S. og Whitehouse, Martin J. og Weaver, Steve D. og Woodhead, Jon D. og Uysal, I. Tonguc og Turnbull, Rose http://espace.library.uq.edu.au/view/UQ:188107 2009-11-27T09:55:20Z StJohn, D. H. og Easton, M. A. og Qian, Ma http://espace.library.uq.edu.au/view/UQ:173366 2009-04-01T00:00:00Z Dargusch, M. S. og Hamasaiid, A. og Dour, G. http://espace.library.uq.edu.au/view/UQ:285259 Beta titanium alloys are increasingly attractive because of their superior combination of properties such as high strength and fracture toughness. These alloys are finding potential applications in the manufacture of aircraft components such as landing gear, springs and nacelles. Innovative machining solutions are required to reduce the cost of production of beta titanium components and improve cycle time. Previous research has reported that these alloys have poor machinability compared to the more common Ti–6Al–4V titanium alloy. This paper aims to investigate the behaviour of the Ti–6Cr–5Mo–5V–4Al beta titanium alloy using laser assisted machining (LAM). The LAM technique utilises a laser beam which is applied onto the workpiece surface locally in front of the cutting tool in order to provide external heat to significantly reduce the yield strength of the material. This reduces the cutting forces required to machine the workpiece and increases metal removal rates. In this study, the effect of the laser beam on the cutting forces and cutting temperature is critically analysed over a wide range of feed rates and cutting speeds and is compared to the results obtained from conventional (un-assisted) machining of this beta titanium alloy. This investigation has shown that LAM significantly reduces cutting forces within a certain range of cutting parameters. Maximum benefit was achieved at feed rates between 0.15 and 0.25 mm/rev and cutting speeds between 25 and 100 m/min at a laser power of 1200 W during LAM of the Ti–6Cr–5Mo–5V–4Al beta titanium alloy. 2012-11-15T12:10:57Z Rashid, R. A. Rahman og Sun, S. og Wang, G. og Dargusch, M. S. http://espace.library.uq.edu.au/view/UQ:253969 A rail squat is a crack growing below the running surface of a rail, leading to a depression in the rail surface, caused by plastic flow above the crack. Squats are a major problem on track in a number of countries, such as France and Australia, and have become more common in recent years. Severe grinding or more commonly replacement of the rail affected is needed to deal with the problem, incurring significant maintenance costs. In Australia, the Co-operative Research Centre for Railway Engineering has funded a project to investigate the factors influencing the formation and growth of rail squats. The problem is being approached differently at three institutions. Metallurgical investigations of squat cracks at the University of Queensland indicate the presence of a thin brittle white etching layer (WEL) on the rail surface, resulting from severe local transient heating of the rail due to wheel slip. This is only about 30 microns thick, but does help initiate cracks. At Central Queensland University vehicle dynamics studies have being conducted to identify failure indices indicative of the formation of rail squats, in situations such as in a transition into a curve. As well, experiments are underway to detect the white etching layer on track using eddy current measurements. Crack initiation can only occur if wear does not remove flaws rapidly enough, so a failure criterion must account for this trade-off. Crack growth of squat cracks is being studied at Monash University and at the University of Queensland. Progress includes the first accurate measurement of the growth of cracks shorter than 1mm in rail steel, enabling identification of a crack growth law for short cracks in rail steel. This law is appropriate in the fatigue regime applying during early growth of a squat crack, a situation where Paris law cannot be used. The effect on crack growth of entrapped fluid in short cracks in rail steel is also being studied experimentally, and is found to be quite significant even with use of a SENT test specimen. Growth of squats on track is being monitored by ultrasonic measurements in several locations in Sydney by Railcorp. 2011-10-03T00:00:00Z Daniel, Bill (W. J. T.) og Jones, Rhys og Mohan, Sajith og Pal, Sarvesh og Farjoo, Mohammadalli og Kerr, Malcolm http://espace.library.uq.edu.au/view/UQ:34674 The study of the mechanisms of mechanical alloying requires knowledge of the impact characteristics between the ball and vial in the presence of milling powders. In this paper, foe falling experiments have br cn used to investigate the characteristics of impact events involved in mechanical milling. The effects of milling conditions, including impact velocity, ball size and powder thickness. on the coefficient of restitution and impact force are studied. It is found that the powder has a significant influence on the impact process due to its porous structure. This effect can be demonstrated using a modified Kelvin model. This study also confirms that the impact force is a relevant parameter for characterising the impact event due to its sensitivity to the milling conditions. (C) 1998 Elsevier Science S.A. 2007-08-13T00:00:00Z Huang, H og Dallimore, MP og Pan, J og McCormick, PG http://espace.library.uq.edu.au/view/UQ:206747 Nanoindentation was performed in the (0. 0. 1) and (1. 1. 0) planes of magnesium oxide single crystal. The results showed that pop-in events were observed in both cases, which were accompanied by acoustic emissions. The energy released in a pop-in event was related to the acoustic emission energy. The pop-in indicated the onset of plastic deformation. Using the Hertzian contact theory and the measured pop-in load, the critical shear stresses for slipping on the (0. 0. 1) and (1. 1. 0) planes were estimated. The stress value for the (0. 0. 1) plane was about 17% higher than that of the (1. 1. 0) plane. © 2010 Elsevier B.V. 2010-07-04T00:00:00Z Dong, Zhigang og Huang, Han og Kang, Renke http://espace.library.uq.edu.au/view/UQ:9240 2005-08-29T00:00:00Z Lilley, Charles R. og Macrossan, Michael N. http://espace.library.uq.edu.au/view/UQ:217552 2010-09-30T00:00:00Z Sun, Haiqing og Shi, Yinong http://espace.library.uq.edu.au/view/UQ:238837 Generating short- and long-term mine production schedules in isolation and independently from each other means that only a local optimum can be achieved when each scheduling phase is carried out. The globally optimal solution however, can be achieved when integrating scheduling phases and accounting for the interaction between short-term and long-term activities simultaneously. This paper addresses the task of integrating short- and long-term production plans by combining the short-term objective of minimising deviation to targeted mill feed grade with the long-term objective of maximising net present value (NPV) into a single mathematical model. A case study is presented which compares the present values of the same stope data set scheduled via separate long and short-term models and than by the proposed integrated model which applies a predetermined penalty for each tonne of metal deviation to target for the respective ore tonnage being processed. This allows an operation to obtain a globally optimal scheduling regime when taking into consideration the cost and loss of value resulting from fluctuations in grade to the mill over the short-term. 2011-03-25T00:00:00Z Nehring, M. og Topal, E. og Kizil, M. og Knights, P. http://espace.library.uq.edu.au/view/UQ:278504 2012-08-02T15:50:16Z Mu, D. og Huang, H. og Nogita, K. http://espace.library.uq.edu.au/view/UQ:294866 2013-03-26T09:24:06Z Song, G.-L. og Shi, Z. http://espace.library.uq.edu.au/view/UQ:79554 This paper reviews various aspects of anodizing of magnesium alloys, such as the basics, processes, properties and applications. It systematically summarises the existing fundamental studies and technical developments of anodizing of magnesium alloys, and concludes that new anodizing processes based on electrolytic plasma anodizing that convert the surface of a magnesium alloy into a hard ceramic coating in an electrolytic bath using high energy electric discharges can offer improved wear and corrosion resistance. These new anodized coatings are often claimed to perform better than the traditional ones obtained through older anodizing processes, such as DOW17 or HAE. The new anodizing techniques are chromate free and hence environment friendly. It is expected that more cost-effective, environment-friendly and non-toxic anodizing techniques will be developed and applied to magnesium alloy components in the future. 2007-08-15T00:00:00Z Blawert, C. og Dietzel, W. og Ghali, E. og Song, G. L. http://espace.library.uq.edu.au/view/UQ:96651 2007-08-24T00:00:00Z Taylor, J. A. og Wang, H. og St John, D. H. og Bainbridge, I http://espace.library.uq.edu.au/view/UQ:199610 The yield stress (0.2%) of 5 mm thick high pressure die-cast AZ91 and AM60 alloys has been compared to the respective Vickers hardness. The yield stress and hardness were measured in as-cast specimens, and in specimens directly aged (from the as-cast condition) at 120°C for up to 10000 h. Unlike a range of sand cast and permanent mould cast Mg-Al alloys and an AZ91 alloy, for which the hardness increase proportionally to the yield stress, in high pressure die-cast magnesium alloys the hardness tends to be lower than expected from their yield stress. 2010-03-17T00:00:00Z Bowles, A. og Caceres, C. H. http://espace.library.uq.edu.au/view/UQ:35655 2007-08-13T00:00:00Z Lumley, R. N. og Schaffer, G. B. http://espace.library.uq.edu.au/view/UQ:10073 A method of structural damage detection using non-destructive vibration test is presented. It uses the Frequency Response Function (FRF) data and a finite element model of the virgin structure to construct and display Damage Location Vector (DLV). It is shown that DLV can detect, locate and assess the extent of damage. By using the raw FRF data and its wealth of information, DLV can handle experimental noise and the inherent incompleteness of data. 2004-12-20T00:00:00Z Huynh, D. og Tran, D. http://espace.library.uq.edu.au/view/UQ:9560 A [1983] review, 'Relativity before Einstein' made no mention of the work of Joseph Larmor, whose early derivation of the Lorentz transformation seems to be less well known than those of Lorentz and Poincare. In 1897, Larmor, starting from a first-order transformation similar to Lorentz's first order version, presented the correct form of what is now known as the Lorentz transformation. In his presentation of the theory in 1900 Larmor saw the time dilation effect as a consequence of Maxwell's electromagnetic theory. It was Lorentz who, in 1895, introduced the notion of the relativity of simultaneity (local time), without the time dilation effect. Poincare in 1900 discussed how Lorentz's local time would arise from the procedure of synchronizing moving clocks by exchanging light signals assumed to travel at the same speed in either direction. Lorentz presented the correct version of the transformation in 1899, and discussed the variation of mass with velocity arising from it. In 1902 Lorentz was aware of Larmor's 1897 work but apparently missed its significance. Nevertheless, the credit for the first presentation of the Lorentz transformation including the crucial time dilation belongs to Larmor. 2005-05-13T00:00:00Z Macrossan, Michael N. http://espace.library.uq.edu.au/view/UQ:277456 2012-07-11T00:00:00Z Parra, Hector og Onate, Barbara og Tuazon, Daniel http://espace.library.uq.edu.au/view/UQ:136329 The possible grain refining candidates for Mg-Al alloys that may occur in the superheating process have been systematically studied from a crystallographic perspective. The edge-to-edge matching model was used to investigate and compare the grain refining efficiency of various (Al, Mn) containing phases existing in the melt. The results show that the metastable tau-AlMn phase possesses significantly better crystallographic matching to the Mg matrix than the other Al-Mn intermetallic phases and could therefore serve as an effective heterogenous nucleation site. However, since the metastable tau-AlMn phase can only be generated from the high temperature epsilon-Alkin phase through a massive transformation, overheating the melt is necessary to produce the high temperature epsilon-AlMn phase. During the subsequent cooling to pouring temperatures, the epsilon-AlMn phase will partially or fully transform into the tau-AlMn phase, which in turn can act as a nucleation site. The. rapid cooling and the short isothermal holding time prevent it from further transforming into the equilibrium Al8Mn5 and beta-Mn phases. (c) 2006 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved. 2008-04-24T00:00:00Z Qiu, D. og Zhang, M.-X. og Taylor, J. A. og Fu, H. og Kelly, P. M. http://espace.library.uq.edu.au/view/UQ:292448 Surface modification of titanium-based implants is considered a highly effective solution to enhance osseointegration. This study describes a novel Ti/hydroxyapatite (HA) composite porous coating produced using a cold spraying technique. Experimental results indicate desirable open-cell structure with 50-150 μm pore size and 60-65% macroporosity. In particular, the reinforced HA particles are exposed to the surface of the coating resulting in enhanced mineralization ability in simulated body fluid. None of the coatings displayed a cytotoxic response in SaOS-2 cells cultured in vitro for up to 48 h. The bond strength between the porous coating and the Ti substrate was found to be 20 MPa. These properties are comparative to or better than products currently on the market and thus this novel coating has potential use in orthopedics. 2013-03-01T10:30:35Z Qiu, Dong og Zhang, Mingxing og Grondahl, Lisbeth http://espace.library.uq.edu.au/view/UQ:123359 Mould inserts with high form accuracy can be produced with ease using modem grinding technologies. However, several grinding cycles are often required to reduce the form error to an acceptable value, significantly dependent on the tool path compensation technique used. This paper reports on a novel form error compensation technique for tungsten carbide mould insert machining utilizing a parallel grinding method. In this technique, a newly developed program is used to process the profile data measured using a Form Talysurf profilometer, and to further generate the NC tool path for form error compensation. The developed technique focuses on the compensation of form error resulted by two major error sources, wheel radius and waviness errors. Using the developed technique, the initial residual form error upon the completion of primary grinding is minimized. Subsequently, the residual form error is compensated by modifying the NC tool path. With this technique, the speed of convergence of the residual form error has improved markedly. The grinding result shows that, after just one compensation cycle, a form error of approximately 0.3 mu m in PV is achieved. 2008-01-25T00:00:00Z Chen, W. K. og Kuriyagawa, T. og Huang, H. og Ono, H. og Saeki, M. og Syoji, K. http://espace.library.uq.edu.au/view/UQ:290001 2013-01-27T00:05:03Z Zhao, Ming-Chun og Li, Jing-Li og Zhao, Ying-Chao og Huang, Xiao-Fang og Li, Jin-Zhu og Atrens, Andrej http://espace.library.uq.edu.au/view/UQ:258994 2011-10-22T18:33:21Z Huang, Y. og Lin, J. og Zhang, J. og Ding, X. X. og Qi, S. R. og Tang, C. C. http://espace.library.uq.edu.au/view/UQ:198798 Although the anodising process has been widely used in surface treatment of AI alloys, the well known sulphuric acid anodising process produces inhomogeneous and highly porous anodised coatings on Al alloys containing high Si due to the inertness of the silicon particles. The present work reports a novel micro-arc anodising process for such high-silicon aluminium alloys. Uniform and thick anodising coatings can be obtained through an anodising process in an alkaline electrolyte under high voltage and low current density conditions. The microstructure examination in SEM indicates that most pores in the coatings have been sealed during the anodising process, thus post-treatment that is normally needed for the currently used anodising process can be eliminated. The coating is very promising in the improvement of corrosion resistance for cast high-silicon aluminium alloys. 2010-03-11T00:00:00Z Shi, Z. og Zhang, M.X. http://espace.library.uq.edu.au/view/UQ:237568 2011-03-20T00:08:57Z Ding, Shichao og Meehan, Paul A. og Daniel, William J. T. http://espace.library.uq.edu.au/view/UQ:99764 2007-08-24T00:00:00Z Blake, A. H. og Caceres, C. H. og Dahle, A. K.