| Al_2O_3对B_4C-Al_2O_3-Al显微组织与力学性能的影响 |
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| 引用本文： | 吕鹏,茹红强,喻亮,孙旭东.Al_2O_3对B_4C-Al_2O_3-Al显微组织与力学性能的影响[J].东北大学学报(自然科学版),2008,29(10):1426-1430. |
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| 作者姓名： | 吕鹏 茹红强 喻亮 孙旭东 |
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| 作者单位： | 东北大学材料各向异性与织构教育部重点实验室,辽宁,沈阳,110004 |
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| 摘 要： | 在B4C-Al2O3预烧体中真空熔渗铝制备了B4C-Al2O3-Al复合材料,分析了w(Al2O3)对复合材料显微组织和力学性能的影响.结果表明:B4C-Al2O3-Al复合材料主要由B4C,Al2O3,Al,Al3BC和AlB2等相组成;随着w(Al2O3)的增加,复合材料的HRA硬度先增大后减小,材料的抗弯强度和断裂韧性均先减小后增大,当w(Al2O3)为25%时,复合材料具有较好的综合性能,它的气孔率、硬度、抗弯强度和断裂韧性分别为2.06%,84.4HRA,440.36 MPa和6.53 MPa.m1/2;延性铝的加入、裂纹的偏转和分叉、晶粒的细化、增韧相AlB2的生成及热膨胀的不匹配...
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| 关 键 词： | 复合材料 B4C-Al2O3-Al 真空熔渗 力学性能 显微组织 |
Effect of Al_2O_3 on Microstructure and Mechanical Properties of B_4C-Al_2O_3-Al Composites |
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| LU Peng,RU Hong-qiang,YU Liang,SUN Xu-dong.Effect of Al_2O_3 on Microstructure and Mechanical Properties of B_4C-Al_2O_3-Al Composites[J].Journal of Northeastern University(Natural Science),2008,29(10):1426-1430. |
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| Authors: | LU Peng RU Hong-qiang YU Liang SUN Xu-dong |
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| Institution: | (1) Key Laboratory for Anisotropy and Texture of Materials, Northeastern University, Shenyang 110004, China |
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| Abstract: | B4C-Al2O3-Al composites were prepared by aluminizing the B4C-Al2O3 preforms in vacuum,and the effect of Al2O3 on the microstructure and mechanical properties of the composites was analyzed.The results showed that B4C-Al2O3-Al composite is mainly composed of B4C,Al2O3,Al,Al3BC and AlB2.With the increasing w(Al2O3),the hardness increases first then decreases,but the bending strength and fracture toughness decrease first then increase.The porosity,hardness,bending strength and fracture toughness of the composi... |
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| Keywords: | B4C-Al2O3-Al |
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