Microstructure, surface emissivity and ablation resistance of multilayer coating for lightweight and porous carbon–bonded carbon fiber composites
Microstructure, surface emissivity and ablation resistance of multilayer coating for lightweight and porous carbon–bonded carbon fiber composites
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DOI：
10.1016/j.jallcom.2016.06.208
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发表时间：
2016-11
影响因子：
6.2
通讯作者：
Baosheng Xu;Yang Du;Peng Wang;Liwen Yan;Boqian Sun;Bin Du;Yehong Cheng;C. Hong
中科院分区：
文献类型：
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作者：
Baosheng Xu;Yang Du;Peng Wang;Liwen Yan;Boqian Sun;Bin Du;Yehong Cheng;C. Hong
提高碳键合碳纤维（CBCF）复合材料的抗氧化能力。采用微量氧烧结法和预氧化法在ZrB2改性碳键合碳纤维复合材料（cbcf /ZrB2）上制备了含有ZrB2、MoSi2、SiCw和硼硅酸盐玻璃的多层涂层。研究了多层涂层的显微组织、表面发射率和抗烧蚀性能。得到了表层致密、内层多孔的涂层。在300、500和800℃下，涂层在6 ~ 16 μm波长范围内的总发射率分别为0.72、0.73和0.78。通过高频等离子体风洞试验，在131.8 W/cm2的热流密度和2.7 KPa的滞止压力下，制备的多层涂层在模拟大气再入条件下表现出良好的1000 s抗烧蚀性能。
To improve the oxidation protective ability of carbon–bonded carbon fiber (CBCF) composites. A multilayer coating containing ZrB2, MoSi2, SiCw and borosilicate glass was prepared on ZrB2-modified carbon–bonded carbon fiber composites (CBCFs/ZrB2) by a trace oxygen sintering method and a pre-oxidation process. The microstructure, surface emissivity and ablation resistance of the multilayer coating were studied. The coating containing dense surface layer and porous inner layer was obtained. The total emissivity of the coating in the wavelength range of 6–16 μm at 300, 500 and 800 °C was 0.72, 0.73 and 0.78, respectively. The prepared multilayer coating exhibited excellent ablation resistance for 1000 s under simulated atmospheric re-entry conditions by high frequency plasma wind tunnel test with a heat flux of 131.8 W/cm2and stagnation pressure of 2.7 KPa.