Preparation and Oxidation Properties of Carbon/Carbon Composites with the Antioxidant SiC/NiCS Coating

摘要：

　　In the paper, the SiC/NiCS coating on carbon/carbon composites was designed and prepared, and its oxidation properties was investigated.The SiC transition layer is prepared by embedding method while the NiCS coating by brushing slurry.Oxidation resistance of various coatings and the same coating sintered by different ways are analyzed through the isothermal oxidation experiment.The strength retention of the samples after oxidation is tested through the three-point bending experiment.The surface and cross section morphology of the coating before and after oxidation are observed by SEM, and crystalline phases of the coating are analyzed by XRD.According to the results, the coating have excellent short-time oxidation resistance, and the weightless rate with oxidation time presents linear increasing trend basically.With the increase of temperature, the weight-loss rate increases.The more serious oxidation is, the lower bending strength retention rate is.The integrity and density of the barrier layer and the across-running cracks of the silicon carbide transition layer are the main factors influencing the oxidation resistance of the sample.

关键词： Carbon/carbon composites Design of antioxidant coating The isothermal oxidation experiment Scanning electron microscope X-ray diffraction

作者: Yi Li Fan-hao Zeng Ji-an Liu Zhi-huan Zou Yi GU

作者单位: The National Key Laboratory of Science and Technology on High-Strength Lightweight Structural Materi School of Materials Science and Engineering, Central South University,Hunan ChangSha 410083, China

会议类型: 国际会议

会议名称: The 2016 China Functional Materials Technology and Industry Forum (2016中国国际功能材料大会暨第九届中国功能材料及其应用学术会议)

会议地点: 重庆

会议语种:英文

页码: 881-888

在线出版日期: 2016-07-25（万方平台首次上网日期，不代表论文的发表时间）