Synthesis of FeAl by Using Mechanical Alloyed Al-base Alloy Powder

摘要

Al_(84)Fe_(16), Al_(80)Fe_(20), Al_(75)Fe_(25), Al_(73)Fe_(27) and Al_(70)Fe_(30) were synthesized by mechanical alloying (MA) of Al powder and Fe powder using a planetary ball milling for 180ks in 35kPa argon gas atmosphere. The MA powders were consist of fine particles of about 20 #mu# m diameter and granulated particles. The fine particles were obtained by flaking of the granulated particles. The MA powder of Al_(84)Fe_(16) and Al_(80)Fe_(20) formed Al liquid by heating.The mixture of FeAl composition was prepared by mixing of the mechanical alloyed Al_(80)Fe_(20) powder and Fe powder. This mixture was sintered at 1200K after pressing at 938K. The sintered sample was composed of FeAl phase. The addition of 0.5at percent B to Al_(800Fe_(20) in MA process promoted to form the fine particles.