FeAl/Al_2O_3复合阻氚涂层制备技术的研究进展  

Review on Preparation Techniques of FeAl/Al_2O_3 Composite Tritium Permeation Barriers

作　　者：向鑫[1] 张桂凯[1] 汪小琳[1] 赖新春[1] 

机构地区：[1]中国工程物理研究院,四川绵阳621900

出　　处：《稀有金属材料与工程》2016年第2期522-528,共7页Rare Metal Materials and Engineering

基　　金：国家磁约束核聚变能研究专项(2013GB110006)

摘　　要：FeAl/Al_2O_3复合膜层是聚变堆氚增殖包层及辅助涉氚系统结构材料首选的阻氚涂层。其制备过程通常需要铝化和氧化2个步骤,铝化是Al原子与基体Fe原子通过相互扩散在基体表面形成铁铝固溶体(Fe,Al)或Fe-Al金属间化合物过渡层;氧化是使铝化涂层表面选择性氧化形成Al_2O_3膜。该阻氚涂层的制备可采用物理气相沉积(PVD)、化学气相沉积(CVD)、热浸铝化(HDA)、包埋渗铝(PC)、等离子体喷涂(PS)和电化学沉积(ECD)等技术。相对而言,CVD、HDA和PC等3种技术有较好的应用前景,有望成为聚变堆中FeAl/Al_2O_3阻氚涂层工程化制备的候选技术而ECD技术因其制备过程容易控制、涂层性能稳定、可涂镀复杂结构件等特点在FeAl/Al_2O_3阻氚涂层制备方面颇具吸引力。FeAl/Al2O3 composite coating is the most promising candidate for the tritium permeation barrier（TPB） of structural materials in the tritium breading blanket and auxiliary tritium handling system in fusion reactors.The preparation process of the FeAl/Al2O3 coating generally involves two steps of aluminization and oxidation.Interdiffusion occurs between Al atoms and Fe atoms on the base surface to form（Fe,Al） solid solution or Fe-Al intermetallic transition layer in the aluminization step.In the oxidation step,the aluminide layer surface is selectively oxidized to form Al2O3 film.FeAl/Al2O3 coating can be prepared by the technique of physical vapor deposition（PVD）,chemical vapor deposition（CVD）,hot-dipping aluminization（HDA）,packing cementation（PC）,plasma sputtering（PS） and electro-chemical deposition（ECD） et al.Relatively speaking,CVD,HDA and PC techniques are promising in coating preparation,and have potentials to be selected as the candidate engineering preparation technique of FeAl/Al2O3 composite TPB coating in fusion reactors.Meanwhile,ECD technique is rather appealing for the preparation of FeAl/Al2O3 TPB coating because of its easy process controlling,stable coat performance and availability of coating complex-shaped structure.

关 键 词：FeAl/Al2O3 阻氚涂层 制备技术 

分 类 号：TL627[核科学技术—核技术及应用]