The impact of ambient gas on the magnetic properties of Ti40Zr40Ni20 powders during mechanical alloying

►ductile agglomerates were obtained after 100 h of MA in argon. ►brittle, submicrometer particles were obtained after 40 h of MA in hydrogen. ►Ms decreased for 95 % after 100 h of MA in argon. ►Ms decreased for 30 % after 40 h of MA in hydrogen. ►alloying of Ni with Ti and Zr strongly depends on the ambient gas.