Ablation Mechanism of HfC-HfO2 Protective Coating for SiC-Coated C/C Composites in an Oxyacetylene Torch Environment
Ablation Mechanism of HfC-HfO2 Protective Coating for SiC-Coated C/C Composites in an Oxyacetylene Torch Environment
复制标题
氧乙炔火炬环境下SiC涂层C/C复合材料HfC-HfO2保护涂层的烧蚀机理
DOI：
10.1016/j.jmst.2016.11.010
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发表时间：
2017-10
影响因子：
10.9
通讯作者：
Li KZ
中科院分区：
文献类型：
--
作者：
Yang Yang;Li Kezhi;Liu Guanxi;Zhao Zhigang;Li KZ
为了防止C/C复合材料的烧蚀，采用超音速大气等离子喷涂技术制备了HfC-HfO 2防护涂层。利用X射线衍射仪和扫描电镜对涂层的形貌和显微结构进行了表征。耐烧蚀性测试通过氧乙炔炬进行。结果表明，所制备的涂层致密，针孔少，无裂纹。Hf、C和O元素在截面上分布均匀。不同烧蚀时间后，质量烧蚀率随烧蚀时间的变化而沿着波动。涂层的烧蚀过程可分为快速氧化和固态烧结两个阶段。在烧蚀过程中，涂层中产生了HfCxOy-HfO 2过渡层，这是由于HfC的活性氧化所致。冷却后，涂层表面出现微裂纹，截面结构被破坏，这是由于HfO 2发生相变所致。
To prevent the C/C composites from ablation, HfC-HfO2protective coating was prepared by supersonic atmospheric plasma spraying. The morphology and microstructure of HfC-HfO2coating were characterized by X-ray diffraction and scanning electron microscopy. The ablation resistance test was carried out by an oxyacetylene torch. The results show that the as-prepared coating is dense with little pinholes and crack free. The elements Hf, C and O were uniformly distributed in the cross-section. After ablation for different time, the mass ablation rate fluctuated along with the change of ablation time. The ablation process of the surface coating could be divided into rapid oxidation and solid state sintering stages. During ablation, an HfCxOy-HfO2transitional layer was generated in the coating, which resulted from the active oxidation of HfC. After cooling, some microcracks were observed on the surface of coating, and the structure of cross-section was broken, which were due to the phase transition of HfO2.
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影响因子：
3.1
作者：
A. Pragatheeswaran;P. Ananthapadmanabhan;Y. Chakravarthy;Vandana Chaturvedi;S. Bhandari;K. Ramachandran
通讯作者：
A. Pragatheeswaran;P. Ananthapadmanabhan;Y. Chakravarthy;Vandana Chaturvedi;S. Bhandari;K. Ramachandran
影响因子：
3.1
作者：
X. Yao;Hejun Li;Yulei Zhang;Kezhi Li;Q. Fu;Han Peng
通讯作者：
X. Yao;Hejun Li;Yulei Zhang;Kezhi Li;Q. Fu;Han Peng
影响因子：
6.7
作者：
Yongjie Wang;Hejun Li;Q. Fu;Heng Wu;Dong-jia Yao;B. Wei
通讯作者：
Yongjie Wang;Hejun Li;Q. Fu;Heng Wu;Dong-jia Yao;B. Wei
影响因子：
10.9
作者：
Jacobson, NS;Curry, DM
通讯作者：
Curry, DM
碳/碳复合材料双层ZrSi2-ZrC-SiC/SiC氧化防护涂层
影响因子：
2.8
作者：
Hu, M. H.;Li, K. Z.;Ma, H. L.
通讯作者：
Ma, H. L.