双层辉光离子渗金属技术制备Al-Cr-Si氧化物阻氚涂层  

Preparation of Al-Cr-Si oxide tritium permeation barrier by double glow plasma technology

作　　者：尹磊[1] 陶杰[1] 苏新清[1] 刘红兵[1] 徐江[1] 

机构地区：[1]南京航空航天大学材料科学与技术学院,南京210016

出　　处：《核技术》2010年第10期765-770,共6页Nuclear Techniques

基　　金：国家自然科学基金项目(50571045)资助

摘　　要：本文采用双层辉光离子渗金属技术在316L不锈钢表面进行Al-Cr-Si共渗后氧化处理,制备致密的氧化物阻氚渗透涂层。用SEM、TEM和XRD分析制备涂层的组织结构,用划痕法和抗热震实验对其进行性能测试。结果表明,Cr、Si元素的掺入使涂层生成连续致密的Al2O3氧化膜;在外层富铝区,Al2O3和少量Fe、Cr的氧化物反应生成了尖晶石型复合氧化物Fe(AlCr)2O4。氧流量为0.01L/min时制得的氧化涂层的组织和性能最佳,其结合力达68N,热震实验后表面无裂纹出现。Al-Cr-Si oxide coatings were prepared on 316L stainless steel by double glow plasma surface alloying technique in order to promote the capability against tritium permeation. Microstructures and compositions of the coatings were studied by scanning electron microscope,transmission electron microscope and X-ray diffraction. Adhesion strength of the oxide coatings was tested by scratch adhesion test and thermal shock test. The results showed that dense and continuous Al2O3 films were formed on the substrate owing to the addition of elements Cr and Si. Besides,the spinel-type composite metal oxide Fe（AlCr）2O4 was formed of Al2O3 and iron/chromic oxide in the outer layer. The coatings prepared at oxygen flow rate of 10 standard cubic centimeter per minute exhibited the best microstructure and mechanical properties with a bonding force of 68 N. No cracks were found in the coatings after thermal shock testing.

关 键 词：阻氚 双层辉光离子渗金属技术 316L不锈钢 Al-Cr-Si氧化涂层 

分 类 号：TL341[核科学技术—核技术及应用]