Influence of high presure hot compaction on microstructure of Al-Si-Ni-Mm alloys

Grzegorz Cieślak ,  Jerzy Latuch ,  Tadeusz Kulik 

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

Abstract

The nanocrystalline Al-Si-Ni-Mm alloys have been intensively investigated in the recent years. Al – based alloys containing silicon (Si), rare earth metal (RE) and late transition metal (Ni), have high tensile strength and good wear resistance. Bulk nanostructured alloys were produced by ball milling of nanocrystalline ribbons followed by high pressure hot compaction.
Rapidly solidified ribbons were composed of a-Al crystals embeded in amorphous matrix.
The ribbons were produced by melt-spinning method in argon atmosphere.
Different temperatures in the range from room temperature to 350ºC and pressures of compaction up to 7.7 GPa were applied to improve the quality of compaction investigated alloys. X-ray diffraction, differential scanning calorimetry, transmission and scanning electron microscopy were used for characterisation of microstructure Al-Si-Ni-Mm alloys. The Vickers hardness was measured using a load of 1 kG.

 

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Presentation: poster at E-MRS Fall Meeting 2005, Symposium I, by Grzegorz Cieślak
See On-line Journal of E-MRS Fall Meeting 2005

Submitted: 2005-05-25 12:23
Revised:   2009-06-07 00:44