金属搪瓷高温防护涂层的制备及其抗热震行为研究  

Preparation and Thermal Shock Behavior of a Metalenamel High-temperature Protective Coating

作　　者：李烽杰 陈明辉[1] 张哲铭 王硕[1] 王福会[1] LI Fengjie;CHEN Minghui;ZHANG Zheming;WANG Shuo;WANG Fuhui(Corrosion and Protection Division,Shenyang National Laboratory for Materials Science,Northeastern University,Shenyang 110819,China)

机构地区：[1]东北大学沈阳材料科学国家研究中心腐蚀与防护研究部

出　　处：《中国腐蚀与防护学报》2019年第5期411-416,共6页Journal of Chinese Society For Corrosion and Protection

基　　金：国家自然科学基金(51871053)~~

摘　　要：以低软化点的硼硅酸盐搪瓷作为粘结相,制备了金属搪瓷高温防护涂层,并研究了涂层的抗热震剥落行为。结果表明,硼硅酸盐搪瓷中含有SiO2的比例越高,搪瓷软化点越高。在硼硅比为0.6(质量分数)时,该搪瓷软化温度高于750℃。热震结果显示,含20%镍颗粒的金属搪瓷复合涂层抗热震性能优异,热震30次后涂层表面完好;而无金属颗粒添加或者金属含量过高(40%)时,热震条件下搪瓷涂层易开裂剥落。A metal-enamel composite high temperature protective coating was prepared by using borosilicate enamel with low softening point as bonding phase.Its thermal shock behavior was investigated via cyclically heating at 900℃and quenching into room-temperature water.The higher the proportion of silica,the higher the softening point of the borosilicate enamel.When the ratio(mass fraction)of boron oxide to silica reaches 0.6,the softening point of the borosilicate enamel is higher than 750℃.Thermal shock test indicated that the metal-enamel composite coating containing 20%nickel particles had high thermal shock resistance,and the coating surface was intact after 30 thermal shock cycles.The enamel coating is easy to crack and peel under thermal shock condition when no metal particles are incorporated or the metal content is as high as 40%.

关 键 词：搪瓷涂层 高温合金 热震 

分 类 号：TG174.4[金属学及工艺—金属表面处理]