Novel HfxTa1-xC solid solution nanowire toughened HfC coating: An effective strategy for synchronous enhanced mechanical and anti-ablation performance

被引：5

作者：

Chen, Hui ^{[1
]}

Zhang, Yulei ^{[1
,2
]}

Fu, Yanqin ^{[2
]}

Gai, Wenhan ^{[1
]}

Zhao, Junhao ^{[1
]}

Zhang, Haohui ^{[1
]}

机构：

[1] Northwestern Polytech Univ, Shaanxi Key Lab Fiber Reinforced Light Composite M, Xian 710072, Peoples R China

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

来源：

JOURNAL OF ADVANCED CERAMICS | 2024年 / 13卷 / 05期

基金：

中国国家自然科学基金; 国家重点研发计划;

关键词：

HfxTa1-xC solid solution nanowires; HfC coating; carbon/carbon (C/C) composites; mechanical performance; ablation resistance; THERMAL-SHOCK RESISTANCE; HAFNIUM CARBIDE; SIC NANOWIRES; CHEMICAL-VAPOR; IN-SITU; COMPOSITES; MICROSTRUCTURE; BEHAVIORS; TOUGHNESS; CERAMICS;

D O I：

10.26599/JAC.2024.9220881

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：

Ultra-high-temperature ceramic nanowires have shown increasing potential for use as thermal structural components. Herein, novel single-crystal Hf0.5Ta0.5C solid solution nanowires were synthesized and incorporated with a HfC coating to construct a robust structure with Hf0.5Ta0.5C solid solution nanowires uniformly distributed and interconnected within the coating. The novel Hf0.5Ta0.5C solid solution nanowires could effectively hinder crack propagation through crack tip pinning and crack deflection. This mechanism substantially enhanced the elastic modulus and fracture toughness of the HfC coating by 53.29% and 59.67%, respectively. The toughened HfC coating displayed superior fracture toughness and good interfacial binding strength with the substrate to resist severe oxidation and scouring. Additionally, the high thermal conductivity of the toughened HfC coating promoted heat transmission. Thus, in comparison to the pure HfC coating, the toughened HfC coating displayed smaller mass and linear ablation rates of -0.35 mg<middle dot>s-1 and -0.46 mu m<middle dot>s-1, which decreased by 39.66% and 36.98%, respectively. Our work not only simultaneously enhances the mechanical properties and ablation resistance of HfC-coated carbon/carbon (C/C) composites but also provides novel prospects for advanced ultrahightemperature ceramic nanowires under extreme conditions.

引用

页码：590 / 601

页数：12