Research on Zr₅₀Al₁₅Ni₁₀Cu₂₅bulk amorphous alloys prepared by mechanical alloying and low pressure sintering

Abstract

Amorphous Zr 50 Al 15 Ni 10 Cu 25 alloy powders were fabricated by mechanical alloying technique with commercially pure element powders. The effects of small amount of C, Si 3 N 4 and SiC powders addition on the thermal stability and crystallisation behaviour of the Zr 50 Al 15 Ni 10 Cu 25 amorphous alloy were investigated. The blended powders were compacted into bars by oil hydraulic press, and were sintered in argon atmosphere at different temperatures and pressures. The samples before and after sintering were characterised by X-ray diffraction, scanning electron microscopy, differential scanning calorimetry and electron tensile testing machine. The results demonstrated that a proper addition of Si 3 N 4 powders to the amorphous matrix can improve the thermal stability of the matrix. Suitable additives can help to improve the density and mechanical properties of the matrix in sintering process.

Evolution of microstructural and mechanical properties of nanocrystalline Co2FeAl Heusler alloy prepared by mechanical alloying

“…The limitation on amount of product and the generation of inhomogeneous materials due to high speed of production are related to difficulties in arc-melting. The mechanical alloying (MA) method has been recognized as one of the most powerful methods for the production of novel, high-performance, low-cost materials such as ferrites, oxides, intermetallic materials and Heusler alloys [20][21][22][23][24][25]. For example, Fe 1−x Co x , Ni-Fe-Co and Ni 0.77 Fe 0.16 Cu 0.05 Cr 0.02 have been prepared by MA [26][27][28].…”

The effect of Fe doping on structural and magnetic properties of nanocrystallite Co 2 Cr 1− x Fe x Al Heusler alloys prepared by mechanical alloying

“…The limitation on amount of product and the generation of inhomogeneous materials due to high speed of production are related to difficulties in arc-melting. The mechanical alloying (MA) method has been recognized as one of the most powerful methods for the production of novel, high-performance, low-cost materials such as ferrites, oxides, intermetallic materials and Heusler alloys [20][21][22][23][24][25] Heusler alloys. In our previous work [30], Co 2 CrAl Heusler alloy was prepared by MA and the magnetic properties of the samples were investigated.…”