Experimental investigation of phase equilibria and microstructure in the Co-Ti-V ternary system

被引:34
|
作者
Ruan, J. J.
Wang, C. P.
Zhao, C. C.
Yang, S. Y.
Yang, T.
Liu, X. J. [1 ]
机构
[1] Xiamen Univ, Coll Mat, Dept Mat Sci & Engn, Xiamen 361005, Peoples R China
基金
中国国家自然科学基金;
关键词
Ternary alloy systems; Phase diagrams; Microstructure; HIGH-TEMPERATURE ALLOYS; SINGLE-CRYSTALS; MECHANICAL-PROPERTIES; MAGNETIC-PROPERTIES; CO3TI POLYCRYSTALS; ORDERED ALLOYS; HYDROGEN; BEHAVIOR; AL; DEFORMATION;
D O I
10.1016/j.intermet.2014.01.011
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
The phase equilibria in the Co-Ti-V ternary system have been investigated by means of optical microscopy (OM), electron probe microanalyzer (EPMA), differential scanning calorimetry (DSC), field emission scanning electron microscope (SEM) and X-ray diffraction (XRD). The mechanical properties were measured by compressive tests. Four isothermal sections of the Co-Ti-V ternary system at 800 degrees C, 1000 degrees C, 1100 degrees C and 1200 degrees C were experimentally established. The results show that: (I) there is no ternary compound in this system; (2) the CoTi2 phase and Co3Ti phase stabilized by the V addition; (3) a large solubility of Ti in the sigma-Co2V3 phase was observed at all isothermal sections of 800 degrees C, 1000 degrees C, 1100 degrees C and 1200 degrees C; (4) The alloy with the distribution of fine cuboidal Co3Ti (L1(2)) in (alpha Co) phase was observed. (5) The compressive strength of Co77.29Ti5.83V16.88 (at.%) alloy at room temperature was measured to be about 1985 MPa. The newly determined phase equilibria in this system will provide useful information for the development of Co-based and Ti-based materials. (C) 2014 Elsevier Ltd. All rights reserved.
引用
收藏
页码:121 / 131
页数:11
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