压痕法研究ZrO_2层状复合陶瓷的抗热震性  

Study of thermal shock resistance for ZrO_2 laminated ceramics by indentation method

作　　者：陈蓓[1] 丁培道[2] 程川[3] 周泽华[4] 

机构地区：[1]高电压与电工新技术教育部重点实验室,重庆400044 [2]重庆大学材料学院 [3]重庆大学资源与环境工程学院 [4]中国科学院上海硅酸盐研究所

出　　处：《耐火材料》2004年第4期234-237,共4页Refractories

基　　金：国家"8 63"计划资助项目 (2 0 0 1AA331 0 50 )

摘　　要：用压痕法测试了单层和层状两种ZrO2 陶瓷材料的抗热震性能。研究结果表明 :ZrO2 层状复合陶瓷的临界热震温差ΔTc=4 0 0℃ ,比ZrO2 单层陶瓷高出15 0℃左右 ,同时还表现出其ΔTc与陶瓷厚度无关的优异性质。现场试验结果也证明 ,ZrO2 层状复合陶瓷抵抗 15 0 0℃冷热骤变的能力优于ZrO2 单层陶瓷。研究认为 ,界面压应力作用部分或全部抵消了热冲击应力 ,使裂纹在界面处发生偏转 ,提高了材料的断裂能和断裂功 。The thermal shock resistances of ZrO 2 monolayer and laminated ceramics were determind by indentation method. Indentation thermal shock test showed that the critical thermal shock temperature difference of the ZrO 2 laminated ceramics was 400 ℃, higher by 150 ℃ than that of monolayer ceramics, which had no relations with the thickness of the laminated ceramics. Using 40 mm×40 mm×8 mm laminated ceramics as the side dam in 250 mm twin-rolling casting technics,the results showed that the ZrO 2 laminated ceramics can withstand the thermal shock of molten steel at the beginning of the casting.The interface compressive stress of the laminated ceramics countacts the thermal stress and makes the crack deflection,that will impove the thermal shock resistance of the ceramics.

关 键 词：压痕法 ZrO2层状复合陶瓷 抗热震性 氧化锆 临界热震温差 界面压应力 侧封 

分 类 号：TQ175.715[化学工程—硅酸盐工业]