Experimental determination and thermodynamic reassessment of the Al-Cr-Ru ternary system

被引：0
|
作者：
Ma, Du-pei [1 ]
Ke, Sheng-kun [1 ]
Li, Zhi [1 ,2 ]
Hu, Jing-xian [1 ,2 ]
Yin, Fu-cheng [1 ,2 ]
Liu, Yan [1 ,2 ]
Liu, Ye [1 ,2 ]
机构：
[1] Xiangtan Univ, Sch Mat Sci & Engn, Xiangtan 411105, Peoples R China
[2] Xiangtan Univ, Key Lab Mat Design & Preparat Technol Hunan Prov, Xiangtan 411105, Peoples R China
来源：
INTERMETALLICS | 2024年 / 173卷
基金：
中国国家自然科学基金;
关键词：
Al; Cr-Ru ternary system; Phase equilibria; CALPHAD; Thermodynamic assessment; PHASE-DIAGRAM; RICH PART; TEMPERATURE; RUTHENIUM; MICROSTRUCTURE; EQUILIBRIA; STABILITY; CHROMIUM; ALLOYS;
D O I：
10.1016/j.intermet.2024.108404
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
The isothermal sections at 950 degrees C and 1150 degrees C of Al-Cr-Ru ternary system were determined experimentally by equilibrium alloy method, combined with X-ray diffraction, scanning electron microscopy and energy-dispersive spectrometric. Nine and eight three-phase equilibria were confirmed at the 950 degrees C and 1150 degrees C isothermal sections of the Al-Cr-Ru ternary systems, respectively. The liquids surface projection of the Al-Cr-Ru ternary system was determined by identifying the microstructures of the as-cast alloys, and seven primary solidification regions were determined in the liquids surface projection. Besides, the ternary compound tau 2 was identified as end-centered monoclinic structure by transmission electron diffraction analysis. The lattice parameters of the tau 2 phase are a = 0.5175 nm, b = 1.7532 nm, c = 0.5150 nm and alpha = gamma = 90 degrees, beta = 79.167 degrees. Based on the available data of the Al-Cr-Ru ternary system and related binary systems, thermodynamic reassessment of the Al-Cr-Ru ternary system was performed using the Calculation of Phase Diagram approach. A new thermodynamic database for the Al-Cr-Ru ternary system was obtained, and the experimental data are consistent well with the calculated results.
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页数：17
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