原料粉体对95氧化铝陶瓷显微结构与强度的影响
Effect of Raw Material Powder on Microstructure and Fracture Strength of 95Al2O3 Ceramics
贺亦文 1方豪杰 1张晓云 1曾雄 1李明晓 1方美玲 1方归程 1刘语婧 1郭伟明 2林华泰2
作者信息
- 1. 湖南省美程陶瓷科技有限公司 湖南 娄底 417600
- 2. 广东工业大学机电工程学院 广州 510062
- 折叠
摘要
采用三种具有典型特征的 Al2O3 原料粉体制备 95 氧化铝陶瓷.型号 A粉体(粒径:～1.55 μm,粒径较大)、型号B粉体(粒径:～0.36 μm,粒径分布均匀)、型号 C粉体(粒径:～0.38 μm,粉体团聚严重),研究了不同原料粉体对 95 氧化铝陶瓷的显微结构、晶粒尺寸分布和抗弯强度的影响.研究结果表明,三种粉体均可在 1 500℃烧结温度下烧结致密.由于 A粉体粒径最大,制备 95Al2O3 陶瓷平均晶粒尺寸(2.54 μm)最大,晶粒异常长大现象严重,抗弯强度最低(428±36 MPa).B粉体和C粉体由于粒径小,制备的 95Al2O3 陶瓷陶晶粒尺寸较小,分别为 1.26 μm 和 1.12 μm.但是 C 粉体存在较严重的团聚现象,烧结后的陶瓷存在晶粒异常长大,导致其强度(527±34 MPa)低于 A 粉体制备的 95Al2O3 陶瓷(582±25 MPa).
Abstract
Three types of Al2O3 raw material powders with typical characteristics were used to prepare 95Al2O3 ceramics.Model A powder(particle size:～1.55μm,larger particle size),Model B powder(particle size:～0.36μm,uniform parti-cle size distribution),Model C powder(particle size:～0.38μm,powder agglomeration serious).The effects of different raw powders on microstructure,grain size distribution and flexural strength of 95Al2O3 ceramics were studied.Research results show that all three powders can be sintered densely at a sintering temperature of 1 500℃.Since A powder has the largest particle size,the average grain size of the prepared 95Al2O3 ceramic is the largest(2.54μm),the abnormal grain growth is serious,and the flexural strength is the lowest(428±36 MPa).Due to the small particle sizes of B powder and C powder,the prepared 95Al2O3 ceramics have smallergrainsizes,whichare 1.26μm and 1.12μm respectively.However,C powder has serious agglomeration phenomenon,and the sintered ceramic has abnormal grain growth,resulting in its strength(527±34 MPa)being lower than the 95Al2O3 ceramic prepared from A powder(582±25 MPa).
关键词
95氧化铝/粒径/晶粒尺寸/抗弯强度Key words
95Al2O3/Particle Size/Grain Size/Fracture strength引用本文复制引用
出版年
2024
国家科技期刊平台
NSTL
万方数据