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无机材料学报

无机材料学报

• 研究论文 • 上一篇    下一篇

SiC(W)/Si3N4复相陶瓷的注射成型

杨金龙; 谢志鹏; 黄勇; 王林; 陈少荣; 俞心刚   

  1. 清华大学材料科学与工程系; 北京100084

  • 收稿日期:1996-04-15 修回日期:1996-06-17 出版日期:1997-06-20 网络出版日期:1997-06-20

Injection Moulding of SiC(W)/Si3N4 Composite Ceramics

YANG Jinlong; XIE Zhipeng; HUANG Yong; WANG Lin; CHEN Shaorong; YU Xingang

  

  1. Daft. of Mater. Sci. Eng.; Qinghua University Beijing 100084 China

  • Received:1996-04-15 Revised:1996-06-17 Published:1997-06-20 Online:1997-06-20

PDF (PC)

889

摘要：

本文深入研究了硅烷偶联剂和SiC晶须对注射悬浮体流变性的影响，并通过对注射压力，保压压力和保压时间三参数三水平正交实验优化工艺参数，认为保压时间对烧结体质量影响显著，从而在注射成型机浇口流过处设置了加热装置和水冷却装置，延长了浇口封凝时间．通过有机物气相裂解色谱分析及有机物降解差热分析，制定了合理的有机载体脱脂制度，最后用无压烧结采用多步保温法，成功地制备出了发动机陶瓷静叶片.

关键词: SiC（W）／Si3N4复相陶瓷, 注射成型, 流变性, 硅烷偶联剂, 脱脂

Abstract: The effect of silane coupling agent and SiC whisker on the rheologic behavior of injectedsuspension was studied. The process parameters were optimized by the orthogonal experiment ofthe three parameter and three levels of the injection pressure, holding pressure and holding time.To delay the consolication time of the sprue, the heating and cooling apparatus in the injectionmoulded machine were developed. A suitable debindering rule was fomulated by the analysis ofPGC and TGA of organic vehicles decomposition. Finally, the stationary blades of ceramic engine were developed successfully by pressureless sintering with multi-step heat preservation.

Key words: SiC（W）/Si3N4 composite ceramics, injection moulding, rheologic behavior, silanecoupling agent, debindering