Microstructure Characterization of Biomedical TiMoFe Alloy
Abstract
A medical TiMoFe alloy with high strength, low elastic modulus and ultrafine grains is prepared using sparking plasma sintering powder metallurgy method. The morphology and the crystal structure of nanocrystals are studied in detail with Tecnai-G2 F20 field emission transmission electron microscopy and Jems-2010 transmission electron microscopy. Two types of phases are found in the TiMoFe alloy. One is Ti-Mo-Fe three alloy phase which is body centered cubic structure with lattice parameter a=0.332 nm and the crystal size in 500-800 nm, representative of -Ti alloy. Mo and Fe alloy elements reduce the phase transition point of -Ti, enabling the Ti-Mo-Fe alloy to maintain the body centered cubic structure at room temperature. The other type of phase, a face centered cubic Ti phase with the lattice parameter a=0.431 nm and the crystal size in 200-500 nm, is regarded as a new phase.
Keywords
Ti-Mo-Fe Alloy, Face Centered Cubic, Electron Diffraction, Electron Diffuse Scattering
DOI
10.12783/dtmse/icmsea/mce2017/10872
10.12783/dtmse/icmsea/mce2017/10872
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