Experimental Investigation of Phase Equilibria in the Co-Ta-Si Ternary System

Wang，Cuiping1,2; Huang，Xiang1,2; Huang，Liangfeng1,2; Yang，Mujin3; Yang，Peng1,2; Cui，Yunrui1,2; Zhang，Jinbin1,2; Yang，Shuiyuan1,2; Liu，Xingjun1,4

2022-05-01

10.3390/ma15093097

Materials   影响因子和分区

1996-1944

In this work, two isothermal sections of the Co-Ta-Si ternary system at 900 C and 1100 C are constructed in the whole composition range via phase equilibrium determination with the help of electron probe microanalysis (EPMA) and X-ray diffraction (XRD) techniques. Firstly, several reported ternary phases G (Co Ta Si ), G (Co TaSi ), E (CoTaSi), L (Co Ta Si) and V (Co Ta Si ) are all re-confirmed again. The G phase is found to be a kind of high-temperature compound, which is unstable at less than 1100 C. Additionally, the L phase with a large composition range (Co Ta Si ) crystallizes with a hexagonal crystal structure (space group: P6 /mmc, C14), which is the same as that of the binary high-temperature λ-Co Ta phase. It can be reasonably speculated that the ternary L phase results from the stabilization toward low-temperature of the binary λ-Co Ta through adding Si. Secondly, the binary CoTa and SiTa phases are found to form a continuous solid solution phase (Co, Si)Ta with a body-centered tetragonal structure. Thirdly, the elemental Si shows a large solid solubility for Co-Ta binary compounds while the Ta and Co are hardly dissolved in Co-Si and Ta-Si binary phases, respectively.

Co-based superalloy Co-Ta-Si ternary system phase equilibria

SCI ; EI

英语

通讯

National Natural Science Foundation of China[51831007];National Natural Science Foundation of China[51971082];

Chemistry ; Materials Science ; Metallurgy & Metallurgical Engineering ; Physics

Chemistry, Physical ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering ; Physics, Applied ; Physics, Condensed Matter

WOS:000799234400001

MDPI

20221812046969

Binary alloys ; Carbon dioxide ; Cobalt alloys ; Cobalt compounds ; Crystal structure ; Electron probe microanalysis ; Silicon ; Superalloys ; Tantalum compounds ; Temperature ; Ternary systems

Metallurgy and Metallography:531 ; Nonferrous Metals and Alloys excluding Alkali and Alkaline Earth Metals:549.3 ; Thermodynamics:641.1 ; Chemistry:801 ; Inorganic Compounds:804.2 ; Crystal Lattice:933.1.1

2-s2.0-85129039418

Scopus

1.College of Materials and Fujian Provincial Key Laboratory of Materials Genome,Xiamen University,Xiamen,361005,China
2.Xiamen Key Laboratory of High Performance Metals and Materials,Xiamen University,Xiamen,361005,China
3.Department of Mechanical and Energy Engineering,Southern University of Science and Technology,Shenzhen,518055,China
4.School of Materials Science and Engineering,Institute of Materials Genome & Big Data,Harbin Institute of Technology,Shenzhen,518055,China

Wang，Cuiping,Huang，Xiang,Huang，Liangfeng,et al. Experimental Investigation of Phase Equilibria in the Co-Ta-Si Ternary System[J]. Materials,2022,15(9).

Wang，Cuiping.,Huang，Xiang.,Huang，Liangfeng.,Yang，Mujin.,Yang，Peng.,...&Liu，Xingjun.(2022).Experimental Investigation of Phase Equilibria in the Co-Ta-Si Ternary System.Materials,15(9).

Wang，Cuiping,et al."Experimental Investigation of Phase Equilibria in the Co-Ta-Si Ternary System".Materials 15.9(2022).