抗氧化石墨材料的实验研究  

Experimental studies on oxidation resistant graphite materials

作　　者：朱庆山[1] 邱学良[1] 马昌文[1] 

机构地区：[1]清华大学核能技术设计研究院新材料室

出　　处：《清华大学学报（自然科学版）》1997年第6期58-62,共5页Journal of Tsinghua University(Science and Technology)

摘　　要：用一种新工艺——泥浆凝胶工艺制备了石墨材料抗氧化梯度膜，通过初级泥浆涂层和合理的实验参数控制，生成了致密的ＳｉＣ涂层。通过Ｘ射线衍射对涂层进行晶相分析，用扫描电镜分析涂层的成分，证实涂层中ＳｉＣ浓度呈梯度分布，因而缓和了涂层与基体间的热应力。氧化实验表明样品在１０００℃下氧化３００ｈ、１４００℃２００ｈ以及１６００℃、２０ｈ样品质量没有任何损失。Oxidation resistant coating for carbon materials was prepared by a new slip gel method. Dense silicon carbide coating was obtained through controlling the experimental parameters and primary slip coating. The phase structure and composition of the film were investigated by X ray image and scanning electron microscopes, respectively. It demonstrated that there existed a gradient composition of silicon carbide in the film, which can reduce the thermal stress. Oxidation tests showed that no mass loss was observed after oxidizing for 300 h in 1 000 ℃,200 h in 1 400 ℃ and 20 h in 1 600 ℃. No crack and spall occurred after 20 thermal cycles in 1 400 ℃ .

关 键 词：氧化实验 石墨 抗氧化 泥浆-凝胶法 

分 类 号：TQ127.11[化学工程—无机化工]