51. Investigation of phase equilibria in the Ti-Co-Zr ternary system
- Author
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J.W. Huang, Yinping Zeng, Z.P. Jin, Huayun Liu, L.L. Zhu, and Gemei Cai
- Subjects
010302 applied physics ,Ternary numeral system ,Materials science ,Scanning electron microscope ,General Chemical Engineering ,Analytical chemistry ,02 engineering and technology ,General Chemistry ,Electron microprobe ,021001 nanoscience & nanotechnology ,Microstructure ,01 natural sciences ,Isothermal process ,Computer Science Applications ,law.invention ,Crystallography ,Optical microscope ,law ,Phase (matter) ,0103 physical sciences ,0210 nano-technology ,Solid solution - Abstract
Isothermal sections of the Ti-Co-Zr ternary system at 1073 K and 1173 K were determined using Ti-Co-Zr diffusion triples and equilibrated alloys with optical microscopy (OM), X-ray diffraction (XRD), scanning electron microscope (SEM) and electron probe micro-analysis (EPMA) techniques. A unknown ternary phase with composition of ~Ti31.3Co37.9Zr30.8 was observed to be stable at both 1073 K and 1173 K. Two continuous solid solutions Co2(Ti, Zr) and Co(Ti, Zr) were formed between the binary intermediate compounds Co2Ti (c) and Co2Zr (c) as well as between the CoTi and CoZr intermediate compounds, respectively. The solubility of Zr in the CoTi2 phase was nearly 55.0 at% at both 1073 K and 1173 K, and the Co11Zr2 phase was proved to be non-existent at 1073 K and 1173 K. Liquid phase was observed at 1173 K and exists with a wide range in the Ti-Zr-rich part.
- Published
- 2017