Synthesis and characterization of bulk amorphous/amorphous composite alloys through powder metallurgy route
- 136 Downloads
In the present study, amorphous Ni60Nb20Zr20 and Ti50Cu28Ni15Sn7 alloy powders were synthesized separately using a mechanical alloying (MA) technique. The dual-amorphous-phased (Ti50Cu28Ni15Sn7)100−x (Ni60Nb20Zr20) x (x = 0, 10, 20, and 30 vol%) powders were prepared by mixing the corresponding amorphous powders. The dual-amorphous-phased powders were then consolidated into bulk amorphous/amorphous composite (BA/AC) alloy discs. The amorphization status of as-prepared powders and bulk BA/AC composite discs was confirmed by X-ray diffraction (XRD) and transmission electron microscopy (TEM). The microstructure of the BA/AC discs showed that the Ni60Nb20Zr20 phase is distributed homogeneously within the Ti50Cu28Ni15Sn7 matrix. The (Ti50Cu28Ni15Sn7)70(Ni60Nb20Zr20)30 BA/AC disc exhibited a relative density of 96.6% and its Vickers microhardness was 726 kg/mm2.
KeywordsDifferential Scanning Calorimeter Mechanical Alloy Composite Powder Bulk Metallic Glass Vickers Microhardness
- 1.Davidson DL (1991) Metall Trans A 22A:113Google Scholar
- 6.Mattern N, Kuhn U, Gebert A, Gemming T, Zinkevich M, Wendrock H, Schultz L (2005) Scripta Mater 53:271Google Scholar
- 8.Lin HM, Lin CK, Jeng RR, Bor HY, Lee PY (2008) Metall Mater Trans A (in press)Google Scholar
- 9.Annual book of ASTM standards, ASTM C693-84 (1991) p 221Google Scholar