CAJ | 학술논문

为了提高C/C复合材料在高温有氧环境的抗氧化性，在SiC抗氧化涂层防护的基础上，采用气相沉积法及溶胶凝胶吸附冷凝热蒸汽法在C/C复合材料表面制备出了SiC-SiO2/ZrO2-SiC复合涂层。利用扫描电镜、能谱质谱测试及X射线衍射等检测方法对涂层各层进行了分析。结果表明，溶胶吸附ZrCl4蒸汽法制备ZrO2涂层，不仅能够在高温自动修复单层SiC涂层的裂纹缺陷，还起到了在制备外层SiC涂层过程中缓冲应力的作用。这种多层复合涂层在高温下具有良好的抗氧化性，在1800℃等离子焰动态空气氧化120 s后，计算得出该涂层失重速率仅为0.4 g/(m2·s)，表明该涂层具有卓越的抗氧化性。
위료제고C/C복합재료재고온유양배경적항양화성，재SiC항양화도층방호적기출상，채용기상침적법급용효응효흡부냉응열증기법재C/C복합재료표면제비출료SiC-SiO2/ZrO2-SiC복합도층。이용소묘전경、능보질보측시급X사선연사등검측방법대도층각층진행료분석。결과표명，용효흡부ZrCl4증기법제비ZrO2도층，불부능구재고온자동수복단층SiC도층적렬문결함，환기도료재제비외층SiC도층과정중완충응력적작용。저충다층복합도층재고온하구유량호적항양화성，재1800℃등리자염동태공기양화120 s후，계산득출해도층실중속솔부위0.4 g/(m2·s)，표명해도층구유탁월적항양화성。
In order to improve the anti-oxidation property of carbon/carbon composites at high temperature, CVD and sol-gel ab-sorption methods were used to prepare a SiC-SiO2/ZrO2-SiC multilayer on C/C composites. Scanning electron microscopy (SEM), En-ergy Dispersive X-ray Spectroscopy(EDS) and X-ray diffraction (XRD) were applied to analyze the surface of each layer. The results show that intermediate layer prepared by sol-gel absorption process exhibits self-healing function, which could fill the crack and buffer stress of the SiC coating at high temperature. The mass ablation rate of C/C composites with this layer is only 4 g/(m2·s) at 1 800℃after 120 s adsorption. The multilayer shows outstanding erosion resistance.