摘要
为了完善Ti_(2)AlC涂层在事故容错燃料中的设计与应用,研究了近化学计量比和Al含量不足的Ti_(2)AlC在1000~1200℃Ar-41%H_(2)O气氛中的氧化行为。研究结果表明:随着Al含量的减少,Ti_(2)AlC在高温水蒸气中的氧化动力学由抛物线规律向线性规律转变;当Al含量不足时,连续氧化铝层的生长受到限制,形成了不具备保护性的TiO_(2)基氧化层;近化学计量比的Ti_(2)AlC表面可生成较薄的连续致密Al_(2)O_(3)层,防止水蒸气向基体内的扩散。因此,采用近化学计量比的Ti_(2)AlC作为锆合金表面的防护涂层时,能够在高温水蒸气的环境下保护包壳,提升现有轻水反应堆事故容错的能力。
To tailor Ti_(2)AlC coatings for the applications in accident tolerant fuels,the oxidation of near-stoichiometric and Al-lean Ti_(2)AlC was investigated in Ar-41%H_(2)O atmosphere in 1000–1200℃.The oxidation kinetics of phase-pure Ti_(2)AlC in high-temperature water vapor varied from parabolic to linear rate law with Al content decreasing.Insufficient Al content could not sustain the growth of continuous alumina scales,resulting in formation of thick unprotective TiO_(2)-based scales.The formation of thin and protective Al_(2)O_(3)scale for Ti_(2)AlC with stoichiometric composition effectively inhibited the inward diffusion of water vapor.For the application of protective coatings on Zr-based cladding,stoichiometric Ti_(2)AlC is expected to protect cladding from fast oxidation and improve the accident tolerance in the current light water reactors.
作者
雷一明
张洁
柏广海
张晏伟
王晓辉
王京阳
LEI Yiming;ZHANG Jie;BAI Guanghai;ZHANG Yanwei;WANG Xiaohui;WANG Jingyang(Shenyang National Laboratory for Materials Science,Institute of Metal Research,Chinese Academy of Sciences,Shenyang 110016,China;School of Materials Science and Engineering,University of Science and Technology of China,Shenyang 110016,China;Life Management Technology Center,Suzhou Nuclear Power Research Institute,China Nuclear Power Technology Research Institute,Suzhou 215004,China)
出处
《无机材料学报》
SCIE
EI
CAS
CSCD
北大核心
2021年第10期1097-1102,共6页
Journal of Inorganic Materials
基金
National Key R&D Program of China(2017YFB0703201)
National Natural Science Foundation of China(51772302)
National Natural Science Foundation of China-China National Nuclear Corporation Joint Fund(U2067217)
Primary Research and Development Project of Suzhou(SGC201840)。
作者简介
雷一明(1992-),男,博士研究生.E-mail:ymlei14s@imr.ac.cn;Corresponding author:张洁,研究员.E-mail:jiezhang@imr.ac.cn。
