Thermal Stability of Ball Milled Al / Al-Cu-Fe Quasicrystal Metal Matrix Composites

Abstract

Al 65 Cu 23 Fe 12 quasicrystalline (QC) powder was used as a filling material for aluminium matrix composites. Quasicrystalline phase was prepared by mechanical alloying of elemental powders and subsequent annealing. To produce the composites, QC was milled together with pure aluminium in the ratios of Al -20 mass. % QC and Al -10 mass. % QC for various milling times. It was shown that the QC phase in these composites remains untransformed up to the temperatures of 350 -400 0 C. Heating up to higher temperatures initiates the reaction between QC and Al yielding ternary crystalline Al 7 Cu 2 Fe phase; an increase in the milling time raises the reaction rate.

Multi-scaled polymer-based composite materials synthesized by mechanical alloying

“…Furthermore, QC have a low coefficient of friction and rather low-surface energy. Recently we tested the QC as the reinforcement for metal [5,6] and elastomer [7] matrices.…”