纤维增强氧化铝陶瓷复合材料工艺及性能研究  

Study on the properties and process of fiber reinforced alumina ceramic composites

作　　者：王得盼 梁森 周越松 刘龙 WANG De-pan;LIANG Sen;ZHOU Yue-song;LIU Long(School of Mechanical and Automotive Engineering,Qingdao University of Technology,Qingdao 266520,China)

机构地区：[1]青岛理工大学机械与汽车工程学院,青岛266520

出　　处：《复合材料科学与工程》2022年第4期45-49,共5页Composites Science and Engineering

基　　金：国家自然科学基金资助项目(52075280);山东省自然科学基金资助项目(ZR2019MEE088)。

摘　　要：本文采用球磨的方式将氧化铝纤维粉末均匀分散在氧化铝陶瓷浆料中,利用喷雾造粒塔造粒、干压成型后进行常压烧结。探究氧化铝纤维粉末的添加量对氧化铝纤维/氧化铝陶瓷复合材料的性能及微观结构的影响规律,以及陶瓷材料制作的工艺过程中造粒粉粒径的大小、干压成型过程中压力的大小和保压时间对复合材料性能的影响规律。结果表明:当纤维含量为10%时,材料的抗弯强度、断裂韧性和硬度达到最大值,相较于纤维含量为0%时的纯氧化铝陶瓷,抗弯强度提高了17.15%,断裂韧性提高了30.33%,但材料致密度在纤维含量为5%时达到最大值。在干压成型过程中,模压的压力越大,材料的抗弯强度越大,保压时间为8 min时,材料性能最佳,再延长保压时间对材料性能基本没有提高。In this paper, short cut alumina fibers were dispersed uniformly in alumina ceramic slurry by ball milling, and then sprayed and granulated by dry spray molding. The influence of the amount of alumina fiber on the properties and microstructure of alumina fiber/alumina ceramic composite was investigated, and the influence of the particle size of granulating powder, the pressure in the dry pressing process and the holding time on the properties of the composite was investigated. The results show that when the fiber content is 10%, the bending strength and hardness of the material reach the maximum. Compared with the fiber content of 0%, the bending strength increases by 17.15%, the fracture toughness increases by 30.33%, but the density of the material reaches the maximum when the fiber content is 5%. In the process of dry pressing, the greater the molding pressure is, the greater the bending strength of the material is. When the holding time is 8 min, the material performance is the best. Extending the holding time does not improve the material performance.

关 键 词：氧化铝陶瓷 喷雾造粒 干压成型 常压烧结 复合材料 

分 类 号：TB332[一般工业技术—材料科学与工程]