短纤维增强透气性莫来石／铁（A_3S_2／Fe）复合材料烧结特性的研究

RESEARCH ON SINTERING CHARACTERISTICS OF SHORT FIBER REINFORCED PERMEABLE COMPOSITE OF A_3S_2/Fe

本文研究了Ａ３Ｓ２／Ｆｅ复合材料的烧结特性、透气性和纤维增强效果，分析了烧结过程中材料宏观结构和微观组织的形成机理。实验结果表明：纤维增强Ａ３Ｓ２／Ｆｅ复合材料在９００￣１０００℃具有良好的烧结性能，烧成后表层存在一定厚度的硬化层；纤维增强效果显著。材料抗压强度达１７￣２３ＭＰａ，相对稼气系数为４．３０￣９．６９ｃｍ＾３／（ｃｍ＾２·ｓ·ａｔｍ）。已能满足实际应用的需要。

This paper studies the sintering characteristics and venting quality of A_3S_2/Fecomposite and effectiveness of short fiber reinforcement,and analyzes the formationmechanism of its macrostructure and microstructure in sintering. Experimental results showthat A_3S_2/Fe composite has the good sintering properties at sintering temperatures of 900～1000℃,a hard layer forms in the surface of the composite when the sample is sintered,andshort fibers obviously reinforce this composite,The compressive strength of the compositecan reach 17～23MPa,and the venting quality is within the range of 4. 30～9.69cm￣3/(cm￣2·s·atm),which can meet the needs in application.