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1一种新型的SiC-ZrB_2涂层包覆C/C复合材料的制备及烧蚀性能(英文)显示文摘利用两步工艺结合泥浆烧结法和化学气相反应法在C/C复合材料表面制备了一种新型的SiC-ZrB_2涂层。SiC-ZrB_2涂层由分散的ZrB_2相和连续的SiC相组成,涂层与C/C复合材料基体结合较好。与C/C复合材料相比,SiC-ZrB_2涂层包覆C/C复合材料试样具有更好的抗烧蚀性能。SiO_2-ZrO_2陶瓷层的阻氧作用、气态氧化产物的散热以及ZrO_2的钉扎作用是涂层试样具有良好抗烧蚀性能的主要原因。黄东 张明瑜 黄启忠 王丽平 汤贤 杨鑫 童凯 2015Transactions of Nonferrous Metals Society of China2015,25,11:5
2Effect of SiC Location on the Ablation of C/C-SiC Composites in Two Heat Fluxes显示文摘How layer-segregated distribution of SiC affects the ablation of C/C-SiC composites was studied in the present work.A certain amount of SiC particles was deposited at the non-woven(C/C—SiC-1) and web(C/C-SiC-2) layer of 2D needle-punched carbon fibre fabric reinforced pyrocarbon composites,respectively.Ablation under oxyacetylene torch demonstrated that the two composites have similar ablation rates in heat flux of 2.38 MW/m^2 whereas ablation rates of C/C-SiC-2 were much higher than those of C/C—SiC-1 when heat flux was 4.18 MW/m^2.SiO_2 covered partially the defective surface of both composites in the lower heat flux.The different SiC locations induced distinct defects and then led to the two composites' dissimilar ablation rates in the higher heat flux.Lei Liu Hejun Li Kui Hao Xiaohong Shi Kezhi Li Chang Ni 2015Journal of Materials Science & Technology2015,31,4:3
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