Alumina Coatings Prepared by MOCVD as Tritium Permeation Barriers

摘要：

　　In this work, alumina coatings were deposited on CLAM and 316L via MOCVD.The phase, microstructure and thermal cycling behavior of the coatings on CLAM were investigated by XRD, SEM and TEM.The deuterium permeation was ex amined from the coatings on 316L.The results show that the 700℃ annealed coating on CLAM is amor phous alumina, while γ-alumina is obtained in the 900℃ annealed coating.The coatings are continu ous, uniform and 550-560 nm of thickness.After thermal cycling, the 700℃ annealed coating on CLAM exhibits no obvious change of morphology, while micro cracks form on the 900℃ annealed coating.Furthermore, the deuterium permeation behavior of the coating on 316L is a hybrid perme ation between hydrogen diffusion limited and surface reaction limited.The deuterium permeability of the coating is P =1.99 × 10-6exp(-117 × 103/RT) mol/m· s.Pa0.5.The permeability of coating is 119 times less than that of 316L at 600℃.

关键词： MMOCVD alumina coating thermal cycling deuterium permeation

作者: Di He Shuai Li Xiaopeng Liu Chao Zhang Hua Zhang Yunyi Wu Qinghe Yu Shumao Wang Lijun Jiang

作者单位: Department of Energy Materials and Technology,General Research Institute for Nonferrous Metals,Beijing,100088,China

会议类型: 国际会议

会议名称: The 12th China-Russia Symposium on Advanced Materials and Technologies(第十二届中俄双边新材料新工艺国际会议)

会议地点: 昆明

会议语种:英文

页码: 363-367

在线出版日期: 2013-11-19（万方平台首次上网日期，不代表论文的发表时间）