| 稀土氧化物对Si3N4陶瓷力学性能和显微组织的影响 |
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| 引用本文： | 杜大明,魏圣泉,江晓东,白小波.稀土氧化物对Si3N4陶瓷力学性能和显微组织的影响[J].陶瓷学报,2012,33(1):66-68. |
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| 作者姓名： | 杜大明 魏圣泉 江晓东 白小波 |
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| 作者单位： | 九江学院机械与材料工程学院,江西九江,332005 |
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| 基金项目： | 九江学院校级科研项目，大学生自主创新性试验项目 |
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| 摘 要： | 采用常压烧结工艺制备了Si3N4-Y2O3-La2O3陶瓷,并对Si3N4陶瓷的力学性能、相组成和显微组织进行了分析和讨论。结果表明:添加4%Y2O3～4%La2O3的复合稀土氧化物后,Si3N4陶瓷呈长柱状的β-Si3N4晶粒,抗弯强度为960MPa,断裂韧性为7.5MPa.m1/2,具有较好的力学性能。
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| 关 键 词： | 稀土氧化物 氮化硅 力学性能 显微组织 |
Effect of Rare Earth Oxides on Mechanical Properties and Microstructure of Si3N4 Ceramic |
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| DU Daming
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WEI Shengquan
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JIANG Xiaodong
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BAI Xiaobo.Effect of Rare Earth Oxides on Mechanical Properties and Microstructure of Si3N4 Ceramic[J].Journal of Ceramics,2012,33(1):66-68. |
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| Authors: | DU Daming WEI Shengquan JIANG Xiaodong BAI Xiaobo |
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| Affiliation: | ((School of Mechanical and Materials Engineering,Jiujiang University,Jiujiang Jiangxi 332005) |
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| Abstract: | Si3N4-Y2O3-La2O3 ceramics were fabricated by pressureless sintering,and the mechanical properties,phase composition and microstructure of the ceramics were studied and discussed.The results show that Si3N4 ceramic is made up of rod-like β-Si3N4 grains,its bending strength and fracture toughness are 960MPa and 7.5MPa·m1/2,when 4%Y2O3-4%La2O3 is added. |
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| Keywords: | rare earth oxides Si3N4 mechanical property microstructure |
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