CAJ | 학술논문

为了提高C/C复合材料的抗氧化性,在C/C复合材料基体上制备了ZrB2-MoSi2/SiC涂层.采用包埋法制备SiC中间层,采用喷涂法制备ZrB2-MoSi2外涂层.用XRD和SEM分别分析、测试所制备涂层的物相组成和显微结构,研究涂层复合材料的高温抗氧化性能.结果表明:C/C复合材料的外涂层由ZrB2、MoSi2和SiC三相组成；在1 273K和1 773K下分别氧化30 h和10h后ZrB2-MoSi2/SiC涂层试样的质量损失分别为5.3％和3.0％,涂层表面长有纳米SiC晶须.C/C复合材料ZrB2-MoSi2/SiC涂层具有自愈合特性和良好的高温抗氧化性能.
위료제고C/C복합재료적항양화성,재C/C복합재료기체상제비료ZrB2-MoSi2/SiC도층.채용포매법제비SiC중간층,채용분도법제비ZrB2-MoSi2외도층.용XRD화SEM분별분석、측시소제비도층적물상조성화현미결구,연구도층복합재료적고온항양화성능.결과표명:C/C복합재료적외도층유ZrB2、MoSi2화SiC삼상조성；재1 273K화1 773K하분별양화30 h화10h후ZrB2-MoSi2/SiC도층시양적질량손실분별위5.3％화3.0％,도층표면장유납미SiC정수.C/C복합재료ZrB2-MoSi2/SiC도층구유자유합특성화량호적고온항양화성능.
To improve the oxidation resistance of carbon/carbon composites,ZrB2-MoSi2/SiC coating on the carbon/carbon substrate was prepared.The inner coating of SiC was prepared by pack cementation and the outer coating of ZrB2-MoSi2 was prepared by slurry painting.The phase compositions and microstructures of the coating were characterized by XRD and SEM,respectively.The preparation and the high temperature oxidation property of the coated composites were investigated.The results show that the outer coating of carbon/carbon composites is composed of ZrB2,MoSi2 and SiC phases.The mass losses of the ZrB2-MoSi2/SiC coated samples with SiC nano-whiskers after 30 h and 10 h of oxidation at 1 273 K and 1 773 K were,respectively,5.3％ and 3.0％.The ZrB2-MoSi2/SiC coated samples exhibit self-sealing performance and good oxidation resistance at high temperature.