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Densification and characterization of nanocrystalline hypereutectic Al-Si-Fe-X alloy powder compacts produced by mechanical milling and field assisted sintering
|Kandukuri Y. Sastry 1, Ludo Froyen 1, Jef Vleugels 1, Omer Van der Biest 1, Rolf Schattevoy 2, Juergen Hennicke 3|
1. K. U. Leuven, Department of Materials Science and Engineering (KUL, MTM), Kasteelpark Arenberg 44, Leuven 3001, Belgium
Rapidly solidified pre-alloyed Al-17Si-5Fe-3.5Cu-1.1Mg-0.6Zr (wt%) alloy powder was mechanically milled in air using stearic acid as process control agent. The resulting nanocrystalline powder was degassed at 350C for 5 hrs. Both as-milled and degassed powder were consolidated using field-assisted sintering (FAST) in steel dies under vacuum at 400C. Shrinkage along the pressure axis, temperature and electric current input were automatically stored through a data acquisition system.
Presentation: oral at E-MRS Fall Meeting 2004, Symposium I, by Kandukuri Y. Sastry
See On-line Journal of E-MRS Fall Meeting 2004
Submitted: 2004-04-26 12:22 Revised: 2009-06-08 12:55