A simple way to make pre-stressed ceramics with high strength

查看全文 作　　者：Yiwang [1,2]Bao;Fenghua [1]Kuang;Yi [2]Sun;Yueming [2]Li;Detian [1,2]Wan;Zongyang [2]Shen;Delong [1]Ma;Lingfeng [3]He

机构地区：[1]State Key Laboratory of Green Building Materials,China Building Materials Academy,Beijing,100000,China;[2]School of Materials Science and Engineering,Jingdezhen Ceramic Institute,Jingdezhen,333403,China;[3]Advanced Characterization Department,Idaho National Laboratory,Idaho Falls,83415,ID,USA

出　　处：《Journal of Materiomics》索引2019年第5卷第4期,共6页

基　　金：financially supported by the National Natural Science Foundation of China(Grant No.51472227);General Technology Promotion Project of Industrial Technology in Basic Public Service Capacity Improvement and Industry Quality(Grant No.0714-EMTC-02-00573/6). 摘　　要：A pre-stressing design and a simple fabrication technology to substantially improve the strength of ceramic components are presented.Residual surface compressive stress is generated in ceramic components by pressureless sintering of a green bulk coated with a thin layer of low coefficient of thermal expansion(CTE).The stress level can be controlled by changing the cross-section area ratio,Young's modulus ratio and CTE ratio of the coating.Pre-stressed ZrO_(2) ceramics coated with Al_(2)O_(3) can achieve a flexural strength of 1330±52MPa,45% higher than their uncoated counterpart.Similarly,the flexural strength of building porcelain tiles is increased by 70%,from 67±3 MPa to 114±5MPa.The damage tolerance of pre-stressed ZrO_(2) ceramics is excellent with a high residual strength of ~1200 MPa in a thermal shock test at 325℃.This simple technique can improve the mechanical performance of ceramic components with no limitation of size and shape. 关键词：Pre-stressed ceramics COATING Strength Thermal shock resistance

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A simple way to make pre-stressed ceramics with high strength

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