Comprehensive oxidation mechanisms of heterogeneous laminated HfB2-SiC/Ti ceramics under oxyacetylene conditions

被引：9
作者：
Bai, Yuhang [1 ,2 ]
Wang, Peipei [1 ]
Zhang, Baoxi [3 ]
Du, Huiling [1 ]
Cheng, Laifei [2 ]
机构：
[1] Xian Univ Sci & Technol, Sch Mat Sci & Engn, Xian 710054, Shaanxi, Peoples R China
[2] Northwestern Polytech Univ, Sci & Technol Thermostruct Composite Mat Lab, Xian 710072, Shaanxi, Peoples R China
[3] Northwestern Polytech Univ, Sch Mech Civil Engn & Architecture, Xian 710072, Shaanxi, Peoples R China
来源：
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY | 2022年 / 42卷 / 07期
关键词：
UHTCs; Laminated ceramics; Ablation; Oxidation; ZRB2-SIC COMPOSITES; ABLATION PROPERTIES; SILICON-CARBIDE; BEHAVIOR; GROWTH; MICROSTRUCTURE; OXYGEN; TOUGH;
D O I：
10.1016/j.jeurceramsoc.2022.02.030
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：
A laminated HfB2-SiC/Ti ceramic prepared via tape casting and spark plasma sintering was characterized upon an oxyacetylene torch test at 2040 celcius. The volatility diagram for the binary HfB2-SiC system was established along with the detailed ablation microstructure of the upper surface to investigate the ablation behavior of the samples. In addition, the mass (8.93 mg/s) and linear ablation rate (1.22 mu m/s) of the laminate are ascribed to the strong oxidation protection of the Ti interlayer by the dense SiO2 coating on the side surface, retarding the occurrence of oxidation weight loss and exfoliation at the interface. The corresponding oxidation behavior is proposed.
引用
收藏
页码：3107 / 3117
页数：11
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