Isothermal Sections of the Ni-Cr-Ta Ternary System at 1200 °C and 1300 °C
oleh: Cuiping Wang, Yuhui Liang, Shuiyuan Yang, Mujin Yang, Lingling Li, Jiajia Han, Yong Lu, Xingjun Liu
| Format: | Article |
|---|---|
| Diterbitkan: | MDPI AG 2019-07-01 |
Deskripsi
Two isothermal sections of the Ni-Cr-Ta ternary system at 1200 °C and 1300 °C have been determined by using electron probe microanalysis, energy dispersive spectroscopy and differential scanning calorimeter. A Laves phase (Ni, Cr)<sub>2</sub>Ta(HT)(C14 structure) with large solid solubility stabilized by the Ni addition was determined in both two isothermal sections. The composition range of this phase was about 25.8−66.0 at.% Cr, 2.5-44.3 at.% Ni, and 24.0-40.0 at.% Ta at 1200 °C, which increased with raising temperature. The melting point of the Ni-Cr alloys decreased with the addition of Ta. No ternary compound was found in both these two isothermal sections. The present work could be significant for practical application of nickel-based alloys and future thermodynamics assessment of the Ni-Cr-Ta ternary system.