热处理对原位烧结合成Mo2FeB2陶瓷组织与性能的影响Effects of heat treatment on microstructure and properties of Mo2FeB2 cermet synthesized by in situ liquid phase sintering
李文虎,徐峰,艾桃桃,冯小明
摘要(Abstract)：
用X射线衍射仪、扫描电镜、万能材料试验机研究了真空液相烧结制备的Mo2FeB2金属陶瓷热处理后的组织与性能。结果表明,真空液相烧结Mo2FeB2金属陶瓷主要由Mo2FeB2、MoB2、Fe2B相和铁基粘结相组成,经700～1000℃热处理后,MoB2、Fe2B相逐渐转化为Mo2FeB2相,并且Mo2FeB2晶粒细化,呈规则块状均匀分布在铁基粘结相中。Mo2FeB2金属陶瓷在700～1000℃范围内随热处理温度的升高,弯曲强度、断裂韧性与维氏硬度均增加,当热处理温度为1000℃时,其值分别达到1182.42MPa、13.59MPa·m1/2、9.114GPa,与未处理试样相比,分别增加了5.4%、6.0%、7.0%。
关键词(KeyWords)： Mo2FeB2;微观组织;力学性能;热处理
基金项目(Foundation): 陕西省自然科学基金(2008E120)
作者(Author): 李文虎,徐峰,艾桃桃,冯小明
DOI: 10.13289/j.issn.1009-6264.2010.04.001
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