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% porosity of the sample fabricated from the ball milled ribbon was observed. Further optimisation of the compaction process needs to be performed.