无压烧结SiBON陶瓷的组织结构与力学性能

Heat Treatment Technology and Equipment(2010)

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Abstract
利用熔石英,六方氮化硼和氮化硅陶瓷粉末,通过冷等静压成型和在不同温度下进行无压烧结的方法制备了SiBON陶瓷复合材料,并对其进行了力学性能测试,分析了材料的物相组成与结构.实验结果表明:通过这种简单高效的工艺可以制得性能较好的SiBON陶瓷复合材料,且可通过控制材料组分和烧结温度调整材料的力学性能,其中,材料的致密度在67.3%~98.4%,抗弯强度为60~170 MPa,断裂韧性为0.8~2.1 MPa·m1/2,弹性模量为48~112 GPa.
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Key words
silicon nitride,pressureless sintering,SiBON ceramic composites,mechanical properties
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