Consolidation of intermetallic Al-Ni powder produced by mechanical alloying

Abstract

Powder mixtures of Al-25mol%Ni and Al-40mol%Ni were mechanically alloyed for various milling times. In the powder mechanically alloyed for over 18ks. AlNi (β) phases have formed. The crystallite size of AlNi (β) phases have decreased with increase of milling time, and it became to about 40mm. The Al-40mol%Ni alloy powders mechanically alloyed for 180ks were consolidated by the hot-pressing under various conditions. Density of the compact is increased with increase of hot pressing load. In addition, compression testes have been carried out to investigate mechanical properties of those compacts at room and high temperatures, and then structural change of the compact during the hot pressing.