Layer-structured Cr/Cr_(x)N coating via electroplating-based nitridation achieving high deuterium resistance as the hydrogen permeation barrier  

作　　者：Liyu ZHENG Heping LI Jun ZHOU Xinluo TIAN Zhongyang ZHENG Long WANG Xinyun WANG Youwei YAN 

机构地区：[1]State Key Laboratory of Materials Processing and Die&Mould Technology,International Joint Research Laboratory of Magnetic Confinement Fusion and Plasma Physics,School of Materials Science and Engineering,Huazhong University of Science and Technology,Wuhan 430074,China [2]Southwestern Institute of Physics,Chengdu 610225,China

出　　处：《Journal of Advanced Ceramics》2022年第12期1944-1955,共12页先进陶瓷（英文）

基　　金：supported by the National MCF Energy R&D Program(Grant No.2018YFE0313300);the National Natural Science Foundation of China(Grant No.51402116);the Fundamental Research Funds for the Central Universities(Grant Nos.2018KFYYXJJ028 and 2019KFYXMBZ045).

摘　　要：Hydrogen isotope permeation through structural materials is a key issue for developing nuclear fusion energy,which will cause fuel loss and radioactive pollution.Developing ceramic coatings with high thermal shock and hydrogen resistance is an effective strategy to solve this issue.In this work,a layer-structured Cr/Cr_(x)N coating was successfully fabricated by a facile electroplatingbased nitridation technique,which is easy,facile,and applicable to coating complex-shaped substrates.The Cr/Cr_(x)N coating,composed of a bottom Fe/Cr interdiffusion zone,a middle Cr layer,and a top Cr_(x)N layer,exhibits high bonding strength,high anti-thermal-shock ability,and high deuterium permeation resistance.Its bonding strength achieves 43.6 MPa.The Cr/Cr_(x)N coating remains intact even after suffering 300 thermal shock cycles under a 600℃–water condition.Through optimizing the nitridation temperature,the Cr/Cr_(x)N coating achieves a deuterium permeation reduction factor(PRF)as high as 3599 at 500℃.Considering its scalable fabrication technique and considerable properties,the developed Cr/Cr_(x)N coating may serve as a novel high-performance hydrogen permeation barrier in various fields.

关 键 词：hydrogen permeation Cr_(x)N CR electrodeposition thermal shock resistance 

分 类 号：TQ174.1[化学工程—陶瓷工业]