摘要
本研究采用自蔓延合成β-SiC粉体,添加硼、碳烧结助剂,在不同的烧结温度下,经过无压烧结制备了碳化硅陶瓷。测试了试样密度、烧失率及收缩率,分析研究了不同烧结温度下样品的致密度。通过对比三组不同烧结助剂配方对烧成品致密的影响,并结合样品的显微结构和相组成分析表征,研究了陶瓷微观形态与表观性能的关系。实验结果表明:烧结助剂B含量为1 wt%、C含量为1.5 wt%时,2000℃下烧结得到的材料致密度最佳,其值为2.77g/cm^3。
SiC ceramics were prepared by using self-propagating synthesizedβ-SiC powder mixed with B and C sintering additives,pressureless sintering at different sintering temperatures.The densities of the sintered samples were tested and the weight loss rates and shrinkage rates of the samples were calculated.The effect of sintering temperature and also the compositions on the density of the sintered bodies were analyzed.The experimental results show that the density of sintered samples reached the highest at sintering temperature of2000?C with B content of1wt%and C content of1.5wt%.
作者
钱承敬
陆有军
QIAN Cheng-Jing;LU You-Jun(National Institute of Clean & Low Carbon Energy,Beijing 102211,China;School of Materials Science and Engineering,North University of Nationalities,Yinchuan 750021,China)
出处
《现代技术陶瓷》
CAS
2017年第6期426-432,共7页
Advanced Ceramics
