Amorphous Al60Fe20Ti20 alloy obtained by consolidation of mechanically alloyed powder

Marek Krasnowski ,  Tadeusz Kulik 

Warsaw University of Technology, Faculty of Materials Science and Engineering (InMat), Wołoska 141, Warszawa 02-507, Poland

Abstract

    Bulk amorphous Al60Fe20Ti20 alloy was produced by consolidation of mechanically alloyed powder. Mechanical alloying of 60%Al-20%Fe-20%Ti powder mixture yielded the alloy with an amorphous structure. Thermal behaviour of the milling product was examined using differential scanning calorimetry. It was found that heating in a calorimeter causes crystallisation of the amorphous phase at 525 °C. The amorphous powder was compacted under a pressure of 7.7 GPa at a temperature 500 °C for 180 s. X-ray diffraction investigations of the bulk material revealed that the amorphous structure was retained after consolidation process. The microhardness of the bulk amorphous sample is 856 HV0.2 The density of the bulk amorphous material is 4.113 g/cm3 and its open porosity is negligible. The results obtained show that the quality of compaction preserving amorphous structure is satisfactory and the product’s microhardness is relatively high.

 

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Presentation: Poster at E-MRS Fall Meeting 2009, Symposium H, by Marek Krasnowski
See On-line Journal of E-MRS Fall Meeting 2009

Submitted: 2009-05-25 11:09
Revised:   2009-06-07 00:48