Microstructure and Properties of Self-Reinforced Silicon Nitride
Microstructure and Properties of Self-Reinforced Silicon Nitride
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DOI：
10.1111/j.1151-2916.1993.tb04010.x
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发表时间：
1993-11
影响因子：
3.9
通讯作者：
A. Pyzik;D. R. Beaman
中科院分区：
文献类型：
--
作者：
A. Pyzik;D. R. Beaman
通过开发具有由氧氮化物玻璃原位形成的伸长的[beta]-Si[sub 3] N [sub 4]晶粒的自增强Si[sub 3]N[sub 4]，克服了与制造Si[sub 3] N[sub 4]/SiC晶须复合材料相关的问题。该Si[sub 3]N[sub 4]-Y[sub 2]O[sub 3]-MgO-SiO[sub 2]-CaO基材料具有> 1，000 MPa的弯曲强度和> 8 MPa [中心点] m[sup [1/2]]的断裂韧性。当Y[sub 2]O[sub 3]：MgO比例为3：1 ~ 1：2，CaO含量为0.1 ~ 0.5wt%，Si[sub 3]N[sub 4]含量为90 ~ 96wt%时，获得了力学性能的最佳组合。
Problems associated with manufacturing Si[sub 3]N[sub 4]/SiC-whisker composites have been overcome by developing self-reinforced Si[sub 3]N[sub 4] with elongated [beta]-Si[sub 3]N[sub 4] grains formed in situ from oxynitride glass. This Si[sub 3]N[sub 4]-Y[sub 2]O[sub 3]-MgO-SiO[sub 2]-CaO-based material has a flexure strength > 1,000 MPa and fracture toughness > 8 MPa [center dot] m[sup [1/2]]. The optimum combination of mechanical properties has been obtained with Y[sub 2]O[sub 3]:MgO ratios ranging from 3:1 to 1:2, CaO contents ranging from 0.1 to 0.5 wt%, and Si[sub 3]N[sub 4] contents between 90 and 96 wt%.