摘要
以硼硅玻璃作为基料,MoSi2作为发射剂,SiB6作为助烧剂,采用料浆烧结法在刚性陶瓷隔热瓦上制备高发射、耐烧蚀涂层。设计三种玻璃成分,通过XRD、SEM、发射率测试仪、氧乙炔火焰烧蚀等表征手段,研究不同成分玻璃的抗析晶性能,以及玻璃成分对涂层物相、形貌、发射率、抗氧化性能、抗热震性和抗烧蚀性能的影响。结果表明:随着玻璃中氧化硼含量从10wt%增加到20wt%,玻璃的抗析晶性能提升,制备的涂层更平整。玻璃中氧化硼含量为15wt%时,制备的涂层抗热震、抗氧化以及抗烧蚀性能最好。涂层3~5μm波段发射率在0.9以上。
High emission and ablation resistant coatings were prepared on rigid ceramic insulating tile by slurry sintering method with borosilicate glass as binder,MoSi 2 as transmitter and SiB 6 as sintering aid.Three kinds of glass components were designed.By means of XRD,SEM,emissivity tester,oxyacetylene flame ablation and characterization methods,the crystallization resistance of glasses with different composition and the effects of glass composition on the phase,morphology,emissivity,oxidation resistance,thermal shock resistance and ablation resistance of the coatings were studied.The results show that with the increase of boron oxide content in glass from 10wt%to 20wt%,the crystallization resistance of glass is improved and the prepared coating is smoother.When the boron oxide content in glass is 15wt%,the thermal shock resistance,oxidation resistance and ablation resistance of the coatings are the best.Emissivity of coatings in 3-5μm wave band is over 0.9.
作者
计延琦
朱时珍
马壮
柳彦博
JI Yan-qi;ZHU Shi-zhen;MA Zhuang;LIU Yan-bo(School of Materials Science and Engineering,Beijing Institute of Technology,Beijing 100081,China;National Key Laboratory of Science and Technology on Materials under Shock and Impact,Beijing 100081,China)
出处
《硅酸盐通报》
CAS
北大核心
2019年第10期3221-3228,3265,共8页
Bulletin of the Chinese Ceramic Society
关键词
隔热瓦
高发射
硼硅玻璃
耐烧蚀
insulating tile
high emission
borosilicate glass
ablation resistance
