Long-life ablation resistance ZrB2-SiC-TiSi2 ceramic coating for SiC coated C/C composites under oxidizing environments up to 2200 K

被引：33

作者：

Li, Jinhua ^{[1
]}

Zhang, Yulei ^{[2
]}

Wang, Haohao ^{[2
]}

Fu, Yanqin ^{[2
]}

Chen, Guohui ^{[2
]}

Xi, Zengzhe ^{[1
]}

机构：

[1] Xian Technol Univ, Sch Mat & Chem Engn, Xian 710032, Peoples R China

[2] Northwestern Polytech Univ, CC Composites Res Ctr, State Key Lab Solidificat Proc, Xian 710072, Peoples R China

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2020年 / 824卷

基金：

中国国家自然科学基金;

关键词：

Carbon/carbon composites; ZrB2-SiC-TiSi2; coating; Ablation resistance; Supersonic atmosphere plasma spraying; OXIDATION-RESISTANCE; ZIRCONIUM DIBORIDE; CARBON/CARBON COMPOSITES; MICROSTRUCTURE; PROTECTION; BEHAVIOR; MECHANISM; TIO2; ZRB2;

D O I：

10.1016/j.jallcom.2020.153934

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：

To improve the ablation resistance of carbon/carbon (C/C) composites at temperature about 2200 K, a ZrB2-SiC-TiSi2 ultra-high temperature ceramic coating was prepared by supersonic atmosphere plasma spraying on SiC coated C/C composites. The ZrB2-SiC-TiSi2 coating could protect C/C composites for more than 240 s under heat flux of 2400 kW/m(2). The maximum surface temperature of the sample can reach to 2230 K. In addition, the mass and linear ablation rates of the coated samples after ablation for 240 s are only (0.314 +/- 0.065) x 10(-3) g/s and (0.221 +/- 0.026) x 10(-3) mm/s, respectively. The ZrB2-SiC-TiSi2 coating was converted into three layers after ablation: an outer layer, a particle-stacking layer, and a molten filled layer. The production of ZrTiO4, acting as sintering additive, could promote the sintering of ZrO2 and fill the pores, which effectively improved the ablation resistance of ZrB2-SiC-TiSi2 coating. (C) 2020 Elsevier B.V. All rights reserved.

引用

页数：7

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