Al2O3短纤维增强硅基日用陶瓷的研究  

Study on Al2O3 Short Fiber Reinforced Silicon-Based Ceramics for Daily Use

作　　者：万萍 周莉梅 余峰 骆雯琴 WAN Ping;ZHOU Limei;YU Feng;LUO Wenqin(National Engineering Center for Daily Use and Building Ceramics,Jingdezhen Ceramic University,Jingdezhen 333403,China)

机构地区：[1]景德镇陶瓷大学国家日用及建筑陶瓷工程技术研究中心

出　　处：《中国陶瓷》2019年第12期66-73,共8页China Ceramics

基　　金：2019年度江西省教育厅科技项目

摘　　要：以硅基日用陶瓷为基体,Al2O3短纤维为第二增强相,通过球磨混料、烘干、分散过筛、干压成型以及普通高温烧结等步骤制备Al2O3短纤维/硅质陶瓷基复合材料,研究了Al2O3短纤维掺杂量及烧结温度对硅质日用陶瓷的物相、显微结构、抗弯曲强度、弹性模量、吸水率及体积密度的影响规律,并对其增强机理进行了分析,结果表明:当烧结温度为1260℃,Al2O3短纤维掺杂量为5%时,Al2O3短纤维/硅质陶瓷基复合材料的抗折强度为103.6 MPa,弹性模量为16.7 GPa,体积密度为2.3873 g/cm^3,吸水率为0.34%。未添加Al2O3短纤维的空白样品的抗折强度为52.1 MPa,弹性模量为12.4 GPa,体积密度为2.1412 g/cm^3,吸水率为0.31%,强度提升达到99.25%。In this paper,silicon-based daily-use ceramics were used as the matrix,and Al2O3 short fibers were used as the second reinforcing phase,Al2O3 short-fiber/siliceous ceramic matrix composites were prepared by ball milling,drying,dispersion sieving,dry pressing and ordinary high-temperature sintering.The effects of Al2O3 short fiber doping amount and sintering temperature on phase structure,microstructure,bending strength,elastic modulus,water absorption and bulk density of the silicon-based ceramics were investigated.Meanwhile,the enhancement mechanism was analyzed.When the sintering temperature was 1260℃ and the Al2O3 short fiber doping amount was 5%,the flexural strength of Al2O3 short fiber/siliceous ceramic matrix composite was 103.6 MPa,and the elastic modulus was 16.7 GPa,bulk density of 2.3873 g/cm^3,water absorption of 0.34%.The blank sample without Al2O3 short fibers had a flexural strength of 52.1 MPa,an elastic modulus of 12.4 GPa,a bulk density of 2.1412 g/cm^3,a water absorption of 0.31%,with a strength increasing by 99.25%after reinforcing.

关 键 词：AL2O3短纤维 烧结温度 硅基复合材料 陶瓷增强 

分 类 号：TQ174.73[化学工程—陶瓷工业]