Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1624991 | Journal of Alloys and Compounds | 2008 | 6 Pages |
Abstract
The phase equilibria at 950 °C of the Co-Mo-Ti system was investigated by a combination of a diffusion couple technique and equilibrated alloys. The samples were examined by means of optical microscopy, scanning electron microscopy, electron probe microanalysis, and X-ray diffraction analysis. The isothermal section of the Co-Mo-Ti system at 950 °C consists of 7 three-phase fields and 15 two-phase fields. The following five three-phase equilibria were well determined: (1) TiCo2 (h) + MoCo3 + Mo6Co7, (2) TiCo2 (c) + TiCo2 (h) + TiCo, (3) TiCo2 (h) + TiCo + Mo6Co7, (4) TiCo + Ti2Co + (Mo,Ti), and (5) TiCo + Mo6Co7 + (Mo,Ti). The solubility of Ti in Mo6Co7 was determined to be 23.1 at.% Ti. The solubilities of Mo in TiCo2 (h), TiCo2 (c), and TiCo were measured to be 11.4, 4.7, and 5.4 at.% Mo, respectively. The solubility of Mo in Ti2Co is about 0.3 at.% Mo. The two-phase region of TiCo3 + MoCo3 was found to be very narrow and close to the TiCo3 side.
Related Topics
Physical Sciences and Engineering
Materials Science
Metals and Alloys
Authors
Honghui Xu, Yong Du, Lijun Zhang, Shitong Li, Zhanpeng Jin,