Microstructure and high-temperature oxidation behavior of Ti3SiC2/MoSi2 composite coatings prepared by spark plasma sintering

被引:0
作者
He, Jiahua [1 ]
Zhao, Dui [1 ]
Chen, Jian [1 ]
Lu, Shuaidan [1 ]
Shao, Wenting [1 ]
Liu, Yunzi [1 ]
机构
[1] Xian Technol Univ, Sch Mat Sci & Chem Engn, Xian 710021, Peoples R China
基金
中国国家自然科学基金;
关键词
AL-NB SYSTEM; SI; RESISTANCE; ALLOYS; CORROSION; TI3ALC2; SILICON; PHASES; NBSI2;
D O I
10.1007/s10853-024-10489-8
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
In this study, Ti3SiC2/MoSi2 composite coatings were fabricated on Nb-Si-based alloys by spark plasma sintering (SPS) technique using Ti3SiC2, Mo, and Si powder mixtures. The effect of Ti3SiC2 powder content on the microstructure and high-temperature isothermal oxidation resistance of these composite coatings was investigated. By increasing Ti3SiC2 powders content from 10 to 50 and 70 vol.%, the volume fractions of Ti3SiC2 and TiC in composite coatings are 7.45, 34.99, and 52.12 vol.%, respectively. The 10% Ti3SiC2/MoSi2 composite coatings can protect Nb-Si-based alloys from isothermal oxidation at 1250 degrees C for 200 h, while adding excessive Ti3SiC2 powders in the coating will induce severe cracking of the scale due to an increase in the brittle TiC phase.
引用
收藏
页码:519 / 538
页数:20
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