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

Abstract

Al₈₄Fe₁₆, Al₈₀Fe₂₀, Al₇₅Fe₂₅, Al₇₃Fe₂₇ and Al₇₀Fe₃₀ 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 μm diameter and granulated particles. The fine particles were obt Alned by flaking of the granulated particles. The MA powder of Al84Fe16 and Al₈₀Fe₂₀ formed Al liquid by heating.
The mixture of Fe Al composition was prepared by mixing of the mechanical alloyed Al₈₀Fe₂₀ powder and Fe powder. This mixture was sintered at 1200K after pressing at 938K. The sintered sample was composed of Fe Al phase. The addition of 0.5at%B to Al₈₀Fe₂₀ in MA process promoted to form the fine particles.