Transactions of Nonferrous Metals Society of China
JOURNAL OF RAILWAY SCIENCE AND ENGINEERING
|Vol. 12 No. 4 August 2002|
Ni-Pt-Ta ternary system at 1173K
（Department of Materials Science and Engineering, Central South University,
Changsha 410083, China）
Abstract:The isothermal section of the Ni-Pt-Ta ternary system at 1173K was determined by means of the diffusion triple technology and the electron microprobe analysis. The phase relations in this system were studied. Linear compound (Ni, Pt)3Ta with small solubility forming between Ni3Ta and Pt3Ta was identified. Four binary compounds, i.e. Pt2Ta, Ni2Ta, NiTa and NiTa2, and four three-phase fields, i.e. Pt2Ta +(Ta)+NiTa2, Pt2Ta+NiTa2+NiTa, Pt2Ta+(Ni, PT)3Ta+NiTa and (Ni, Pt)3 Ta+NiTa+Ni2Ta, were also identified.
Key words: Ni-Pt-Ta ternary system; diffusion layers; phase equilibria; isothermal section