Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1618716 | Journal of Alloys and Compounds | 2010 | 4 Pages |
Abstract
The solid-state phase equilibria in the Co-Pt-Tb ternary system at 1173 K (Tb â¤Â 70%) were investigated by X-ray diffraction (XRD), scanning electron microscopy (SEM) and energy dispersion spectroscopy (EDS) techniques. The 1173 K isothermal section consists of 14 single-phase regions, 25 two-phase regions and 12 three-phase regions. At 1173 K, we have observed that the maximum solubility of Tb in α-(Co, Pt) is below 1.5 at.%Tb, with the maximum solid solubility of Pt in the compounds Co17Tb2, Co7Tb2, Co3Tb and Co2Tb being below 1 at.%Pt, 2 at.%Pt, 3.5 at.%Pt and 2 at.%Pt, respectively. Furthermore, the maximum solid solubility of Co in the compounds Pt5Tb, Pt3Tb, Pt4Tb3, PtTb, Pt4Tb5, Pt3Tb5, PtTb2 and PtTb3 is below 1 at.%Co, whereas in Pt2Tb it reaches 17 at.%Co. With the introduction of Co, the Pt4Tb3 phase gradually decomposes into the two neighboring compounds PtTb and Pt2Tb, while with the Co content exceeded 9 at.%Co, the Pt4Tb3 phase disappears. No new ternary compounds or Co5Tb were observed in our study.
Keywords
Related Topics
Physical Sciences and Engineering
Materials Science
Metals and Alloys
Authors
Z. Fuqiang, G. Zhengfei, C. Gang, L. Ruifeng, W. Yong,