Bulk amorphous Ni_(59)Zr_(20)Ti_(16)Sn_5 alloy fabricated by powder compaction

摘要

The possibility of fabrication of bulk amorphous Ni_(59)Zr_(20)Ti_(16)Sn_5 alloy by hot isostatic pressing of powders was investigated. The amorphous powders were obtained by ball milling of amorphous melt spun ribbon and by mechanical alloying of a mixture of powders of pure crystalline elements. Fully amorphous bulk samples were successfully obtained by hot isostatic pressing of both types of powders. However, at least 10 percent porosity of the sample fabricated from the ball milled ribbon was observed. Further optimisation of the compaction process needs to be performed.