Al粉粒度及其添加量对SiC陶瓷材料结构和性能的影响  

Effect of Particle Size and Content of Al Powder on the Structure and Properties of SiC Ceramic Materials

作　　者：李文凤[1] 黄庆飞[1] 侯永改[1] 郭会师[2] 丁志静[1] 谢育波 邹文俊[1] LI Wen-feng;HUANG Qing-fei;HOU Yong-gai;GUO Hui-shi;DING Zhi-jing;XIE Yu-bo;ZOU Wen-jun(School of Material Science and Engineering, Henan University of Technology, Zhengzhou 450001, China;Department of Material and Chemical Engineering, Zhengzhou University of Light Industry, Zhengzhou 450001, China)

机构地区：[1]河南工业大学材料科学与工程学院,郑州450001 [2]郑州轻工业学院材料与化学工程学院,郑州450001

出　　处：《人工晶体学报》2017年第10期1955-1958,1983,共5页Journal of Synthetic Crystals

基　　金：河南工业大学高层次人才科研启动基金(150609);河南工业大学河南省省属高校基本科研业务费专项资金(31400722);校国自然申报支持(31400995)

摘　　要：以Al粉为烧结助剂,采用无压烧结工艺于1600℃下保温3 h烧制SiC陶瓷材料,研究了不同Al粉粒度及其添加量对SiC陶瓷材料结构和性能的影响。结果表明:Al粉可促进SiC陶瓷材料的烧结和力学性能的提高,同时起抗氧化的作用,且粒度较小的Al粉对其性能提升的幅度较大。当添加4wt%粒度为48μm的Al粉时,SiC陶瓷材料的性能较佳,体积密度和显气孔率分别为2.69 g/cm^3和5.8%,显微硬度和抗折强度分别为2790 HV和189MPa。SiC陶瓷材料烧结性能和力学性能的提高可归因于Al粉的促烧结作用,及其氧化产物Al_2O_3和原位生成的少量莫来石分布在SiC颗粒间所起的强化作用。SiC ceramic materials were prepared with A1powder as the sintering aid by pressureless sintering at1600for3h.The effects of particle size and content of A1powder on the structure and properties of SiC ceramic materialswere studied.The results show that A1powder can improve the sintering and mechanical properties of SiC ceramic materials,it also plays an important role in oxidation resistance,and the A1powder with smaller particle size has a significant effect on that of SiC ceramic materials.When theparticle size and content of A1powder are48jjim and4wt%,respectively,SiC ceramic materials can get the best performance.The bulk density and apparent porosity are2.69g/cm3and5.8%,thenthehardness and flexural strength are2790HV and189MPa,respectively.The excellent sintering and mechanical properties of SiC ceramic materials can be attributed to the sintering effect of A1powder and the strengthening effects of the in situ formed A1203and mullite filling in SiC particles.

关 键 词：A1粉 SiC陶瓷材料 无压烧结 显微结构 力学性能 

分 类 号：TQ174.75[化学工程—陶瓷工业]