氧化锆纤维增强的氧化铝陶瓷的抗热震性能  

Thermal Shock Resistance of Zirconia Fiber Reinforced Alumina Ceramics

作　　者：冯帅[1] 王志[1] 丁寅森[1] 史国普[1] 

机构地区：[1]济南大学材料科学与工程学院,山东济南250022

出　　处：《济南大学学报（自然科学版）》2013年第2期123-126,共4页Journal of University of Jinan(Science and Technology)

基　　金：国家自然科学基金(51142010);山东省自然科学基金(ZR2012EML05)

摘　　要：在1 650℃下制备氧化锆纤维增强的氧化铝陶瓷复合材料,研究氧化锆纤维添加量对氧化铝陶瓷抗热震性能的影响。结果表明,在温差为1 400℃的循环空冷条件下,加入氧化锆纤维可以明显提高氧化铝陶瓷的热震次数。当添加纤维质量分数为15%时,复合材料热震次数达到最高为30次,比纯氧化铝陶瓷提高20次;复合材料的抗弯强度和断裂韧性分别比纯氧化铝陶瓷提高62.2%和38.9%,气孔率为6.71%。复合材料力学性能的提高以及适当的气孔率是其抗热震性提高的主要原因。Preparation of zirconia fiber reinforced alumina ceramic composite at sintering temperature of 1 650 ℃ and effect of zirconia fiber content on thermal shock resistance of composite were studied.Results showed that the introduction of zirconia fiber can increase the air-cooling time of ceramic composite at the temperature difference of 1 400 ℃.When mass fraction of zirconia fiber was 15%,the thermal shock time of the composite was 30,more than 10 times of monolithic alumina ceramics.The flexural strength and fracture toughness of the composite increased by 62.2% and 38.9% respectively than that of monolithic alumina ceramics,and its porosity was 6.71%.Increasing of mechanical properties and proper porosity contributed to the improvement of thermal shock resistance.

关 键 词：氧化锆纤维 氧化铝陶瓷复合材料 抗热震性 

分 类 号：TQ174.1[化学工程—陶瓷工业]