| B_4C对ZrB_2-SiC基陶瓷力学性能和显微结构的影响 |
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| 引用本文： | 刘璇,徐强,朱时珍.B_4C对ZrB_2-SiC基陶瓷力学性能和显微结构的影响[J].稀有金属材料与工程,2009,38(Z2). |
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| 作者姓名： | 刘璇 徐强 朱时珍 |
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| 作者单位： | 北京理工大学,北京,100081 |
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| 摘 要： | 采用放电等离子烧结方法(SPS),在烧结温度为1700 ℃下,制备出ZrB_2-SiC-B_4C复合材料,研究了添加不同量的碳化硼(B_4C)对BrB_2-SiC基陶瓷力学性能和微观组织的影响.结果表明:ZrB_2-SiC-5%B_4C(质量分数, 下同)材料的高温强度高于ZrB_2-SiC-3%B_4C材料的高温强度,两种材料的致密度都在95%左右.加入B4C之后,材料的断裂韧性较未加入B4C材料的高.
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| 关 键 词： | 碳化硼 力学性能 显微结构 高温强度 |
Effect of B_4C on Mechanical Properties and Microstructure of ZrB_2-SiC Based Ceramics |
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| Liu Xuan,Xu Qiang,Zhu Shizhen.Effect of B_4C on Mechanical Properties and Microstructure of ZrB_2-SiC Based Ceramics[J].Rare Metal Materials and Engineering,2009,38(Z2). |
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| Authors: | Liu Xuan Xu Qiang Zhu Shizhen |
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| Affiliation: | Liu Xuan,Xu Qiang,Zhu Shizhen (Beijing Institute of Technology,Beijing 100081,China) |
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| Abstract: | ZrB_2-SiC-B_4C was prepared by Spark Plasma Sintering (SPS) process at 1700 ℃. The effect of B_4C content on the mechanical properties and microstructure of ZrB_2-SiC based ceramics was studied. The results show that compared with materials with 3%wtB_4C, the high-temperature strength of the materials with 5wt%B_4C is higher. The relative density is about 95% for all of the materials. Fracture toughness increases when B4C is added. |
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| Keywords: | ZrB_2-SiC B_4C ZrB_2-SiC mechanical properties microstructure high temperature strength |
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