Oxygen blocking enhancement of HfB2-SiC coating using HfB2-HfSi2 alloyed composite powders by self-propagating high-temperature synthesis

被引：3

作者：

Shi, Dalin ^{[1
]}

Ji, Xiang ^{[2
]}

Wu, Binbin ^{[1
]}

Ren, Xuanru ^{[2
]}

Wang, Peipei ^{[3
]}

Wang, Leyu ^{[1
]}

Zhao, Yan ^{[1
]}

Chen, Jiaping ^{[1
]}

Yang, Chunmin ^{[1
]}

Kiryukhantsev-Korneev, Philipp V. ^{[4
]}

Levashov, Evgeny A. ^{[4
]}

Shi, Ji ^{[5
]}

Feng, Peizhong ^{[1
]}

机构：

[1] China Univ Min & Technol, Xuzhou 221116, Peoples R China

[2] Henan Acad Sci, Inst Carbon Matrix Composites, Henan Key Lab High Performance Carbon Fiber Reinfo, Zhengzhou 450046, Peoples R China

[3] Xian Univ Sci & Technol, Coll Mat Sci & Engn, Xian 710054, Shaanxi, Peoples R China

[4] Natl Univ Sci & Technol MISIS, Leninsky Prospect 4, Moscow 119049, Russia

[5] Tokyo Inst Technol, Sch Mat & Chem Technol, 2-12-1 Ookayama,Meguro Ku, Tokyo 1528552, Japan

来源：

CERAMICS INTERNATIONAL | 2023年 / 49卷 / 22期

关键词：

HfSi; 2; HfB 2-SiC coating; Self-propagating high-temperature synthesis; Oxygen permeability; OXIDATION RESISTANCE; COMBUSTION SYNTHESIS; CERAMICS; BEHAVIOR; HFSI2; MOSI2;

D O I：

10.1016/j.ceramint.2023.08.351

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

To suppress the oxidation loosening of HfB2-SiC coating, the HfB2 was alloyed with HfSi2 in the form of composite powders through self-propagating high-temperature synthesis (SHS) technique, which was then used to prepare HfB2-HfSi2-SiC coatings. Compared to the 60HfB2-SiC coating, the 60(HfB2-HfSi2)SHS-SiC coating exhibited lower oxidation activity and better inert oxygen blocking at 1700 degrees C. The addition of HfSi2 promoted the homogenization of the Hf-oxides distribution on the glass layer and the formation of the protective phase HfSiO4, further inhibiting oxygen diffusion. The 60(80HfB2-20HfSi2)SHS-SiC coating exhibited optimal oxygen blocking protection after oxidation at 1700 degrees C, with 87.96% and 92.33% reductions in oxygen permeability and carbon loss rate, respectively.

引用

页码：36679 / 36690

页数：12

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