铬–铝氧化物复合阻氚涂层的制备工艺研究  

Study on preparation process of chromium–aluminum oxide composites tritium permeation barrier

作　　者：李光彬 赖新春[2] 向茂乔 李雨莎 董金全 张迎春[1] 

机构地区：[1]北京科技大学材料科学与工程学院,北京100083 [2]中国工程物理研究院材料研究所,江油621700

出　　处：《粉末冶金技术》2017年第5期363-370,共8页Powder Metallurgy Technology

基　　金：国家磁约束核聚变能源研究专项资助项目(2013GB110006)

摘　　要：氚(T)的原子半径小且反应活性高,极易进入包层结构内部或透过包层材料释放到环境中,导致结构材料性能下降、氚的损失以及放射性污染,因此,阻氚涂层对于聚变堆氚增殖包层的安全运行至关重要。氧化物复合阻氚涂层具有制备工艺简单、化学性质稳定、熔点高等优点,成为近年来聚变堆材料的研究热点。本文将化学电镀、熔盐电沉积及气氛氧化工艺相结合,在金属管材内壁制备氧化铬–氧化铝复合涂层,并对涂层的结构形貌、厚度、结合力等进行了测试分析。铬–铝氧化物复合涂层表面均匀致密,厚度为10~40μm,孔隙率为7%~8%,与基体结合力大于20 N。Due to the small atomic radius and high reactivity, tritium（T） can easily penetrate into the inner of cladding structure and release to the environment, which causes the deterioration of cladding structure materials, loss of tritium, and irradiation pollution. Therefore, Tritium permeation barrier（TPB） plays an important role in the tritium-proliferating cladding for fusion reactor. Oxide composites TPB has some good performances, such as simple preparation process, chemical stability, and high melting point, and becomes a research hotspot in fusion reactor materials in recent years. In this paper, the chromium oxide and aluminum oxide composites coatings were prepared on inner wall of metal pipe by chemical plating, combined with molten salt electrodeposition and atmosphere oxidation process, and the microstructures, thickness, and binding force of coatings were investigated. The results present that, the surface microstructures of oxide composites coating are uniform and compact. The thickness and porosity of chromium oxide and aluminum oxide composites coating are 10~40 μm and 7%~8%, respectively. The binding force between coating and substrates is more than 20 N.

关 键 词：熔盐电沉积 氧化物 复合材料 阻氚涂层 

分 类 号：TQ153.2[化学工程—电化学工业]