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Production of titanium–tin alloy powder by ball milling: Formation of titanium–tin oxynitride composite powder produced by annealing in air

2014; Elsevier BV; Volume: 622; Linguagem: Inglês

10.1016/j.jallcom.2014.10.193

1873-4669

A.S. Bolokang, D.E. Motaung, Christopher J. Arendse, T.F.G. Muller,

Inorganic Chemistry and Materials

Phase transformation was induced by ball milling and annealing of Ti75–Sn25 powder. HCP solid solution was induced by Ball milling and yielded a compressed lattice parameters a = 2.929 Å; c = 4.780 Å and c/a = 1.63. Upon annealing in Ar at 700 °C, Ti3Sn intermetallic with lattice parameters a = 5.916 Å; c = 4.764 Å with (c/a = 0.80) was detected. Subsequent TGA analysis of HCP milled Ti–Sn and Ti3Sn intermetallic in air have resulted in tetragonal oxynitride powders with lattice parameters a = 4.985 Å; c = 2.962 Å, c/a = 0.594 for the former and a = 4.582 Å; c = 2.953 Å and c/a = 0.644 for the latter, respectively. The powder morphology was monitored by the high-resolution transmission electron microscopy while the roughness of the milled was analysed by the atomic force microscopy. Phase transformation was monitored by the X-ray diffraction and complemented by the Raman spectroscopy.