摘要
研究了粉体超微化后碳化硅陶瓷材料显微结构的变化特征 ,分析了超微化处理对碳化硅陶瓷烧结过程及显微结构的影响机理。经超微化处理后 ,粉体颗粒尺寸减小 ,分布范围变窄 ,硬团聚解聚 ,颗粒形状均匀分布 ;素坯均匀性提高 ,坯体烧结温度降低 ,促进了坯体烧结过程 ;陶瓷材料表面显微结构缺陷明显减少 。
The microstructure of silicon carbide ceramics with and without ultra-fine treatment of SiC powder were studied, the effect mechanism of ultra-fine treatment on the sintering process and microstructure were analyzed.The super-fine treated powder can be obtained with smaller particle size,narrower particle-size distribution,uniform shape and no reuniting;the uniformity of green body increased and its sintering temperature decreased,which improved the sintering properties of the body;the surface microstructure defects of silicon carbide ceramics decreased obviously,and an ideal microstructure and better mechanical properties were attained.
出处
《耐火材料》
CAS
北大核心
2004年第4期226-229,237,共5页
Refractories
基金
国家 8 63 - 70 4青年基金资助项目 (2 0 0 2AA7451 0 0 )
