Conferences

Mechanical Properties of Al–Cu–Fe Alloys Sintered at High Pressure

Y.Milman,
    
O.Neikov,
  

I. M. Frantsevich Institute for Problems of Materials Science of the NAS of Ukraine, Krzhizhanovsky str., 3, Kyiv, 03142, Ukraine
Powder Metallurgy - Kiev: Frantsevich Institute for Problems of Materials Science NASU, 2010, #05/06
http://www.materials.kiev.ua/article/1569

Abstract

The structure and mechanical behavior at room temperature of bulk sintered materials with high hydrostatic pressure are studied. Quasicrystalline Al63Cu25Fe12 and Al62.7Cu25Fe12Sc0.3 powders and Al66Cu18Fe8Cr8, powder, which is the quasicrystal approximant, are sintered at high pressure. The powders are obtained by water atomization technique. At an optimal hot compaction pressure of 4.5 GPa, the porosity of the materials is lower than 2%. Sintering is conducted at 700°С. The strain curves of quasicrystals and their approximants that are brittle at standard test conditions are obtained by indentation technique. It is shown that the crystalline approximants of quasicrystals are much closer in their mechanical behavior to quasicrystals than to crystalline solids.


APPROXIMANTS OF QUASICRYSTALS, INDENTATION, QUASICRYSTAL, SINTERING, WATER-ATOMIZED POWDERS