Crystallization behaviour and thermal stability of two aluminium-based metallic glass powder materials

Li, X. P., Yan, M., Yang, B. J., Wang, J. Q., Schaffer, G. B. and Qian, M. (2011) Crystallization behaviour and thermal stability of two aluminium-based metallic glass powder materials. Materials Science and Engineering A: Structural Materials Properties Microstructure and Processing, 530 1: 432-439. doi:10.1016/j.msea.2011.09.107


Author Li, X. P.
Yan, M.
Yang, B. J.
Wang, J. Q.
Schaffer, G. B.
Qian, M.
Title Crystallization behaviour and thermal stability of two aluminium-based metallic glass powder materials
Journal name Materials Science and Engineering A: Structural Materials Properties Microstructure and Processing   Check publisher's open access policy
ISSN 0921-5093
1873-4936
Publication date 2011-12-01
Sub-type Article (original research)
DOI 10.1016/j.msea.2011.09.107
Volume 530
Issue 1
Start page 432
End page 439
Total pages 8
Place of publication Lausanne, Switzerland
Publisher Elsevier
Collection year 2012
Language eng
Formatted abstract
The crystallization behaviour and thermal stability of two Al-based metallic glass powder materials, Al85Ni5Y6Co2Fe2 and Al86Ni6Y4.5Co2La1.5, have been investigated using differential scanning calorimetry (DSC), X-ray diffraction (XRD) and electron microscopy. Both alloy powders show a distinct three-stage crystallization process with a similar gap of ∼75 K between the onset crystallization temperature (Tx) and the second crystallization temperature. Crystallization occurs by the precipitation and growth of fccAl, without intermetallic formation. The apparent activation energy for each stage of crystallization was determined from DSC analyses and the phases resulting from each crystallization stage were identiļ¬ed  by XRD and electron microscopy. The critical cooling rate for each alloy powder was calculated from the DSC data. These results are necessary to inform the consolidation of amorphous powder particles of l85Ni5Y6Co2Fe2 or Al86Ni6Y4.5Co2La1.5 into thick (>1 mm) metallic glass components.
Keyword Aluminium alloys
Metallic glass
Crystallization
Powder
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Mechanical & Mining Engineering Publications
Official 2012 Collection
 
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