摘要
以红柱石、微米级PSZ(部分稳定氧化锆)、苏州土等为主要原料,采用反应烧结法制备了红柱石基复相陶瓷。研究了微米级PSZ的添加量对红柱石基复相陶瓷抗热震性的影响。利用电子探针X射线显微分析仪分析了样品的显微结构及成分。结果表明:样品的主晶相为莫来石和硅酸锆。样品中的氧化锆在应力作用下,发生晶相转变,阻碍裂纹扩展,从而提高样品的韧性和强度;SEM分析结果表明锆英石、单斜氧化锆和α-方石英均布于莫来石间,提高了复相陶瓷的机械性能和断裂性能。
Andalusite-matrix composite ceramic materials were fabricated from andalusite, superifne PSZ, Su Zhou clay and so on. The effect of PSZ content on the thermal shock resistance of the andalusite-matrix ceramics was analyzed. Moreover, the composition and microstructure of the samples were characterized by electron probe micro analyzer. The results showed that the disperse phase of ZrO2in lined to generate phase transformation which hinder crack propagation of the sample leading to high strength and toughness. X-ray diffraction peaks suggested fully developed mullite and zircon phases by reaction sintering of andalusite and PSZ. Microstructure consisting in mullite as a continuous predominant phase in which zircon grain was homogeneously distributed improved almost all the mechanical and fracture properties.
出处
《陶瓷学报》
CAS
北大核心
2015年第3期275-280,共6页
Journal of Ceramics
基金
"973"计划项目(编号:2010CB227100)