| c-BN对于SPS烧结Si3N4/BN复相陶瓷结构和性能的影响 |
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| 引用本文： | 胡健,张帆,王为民,傅正义,张金咏,陈文杰.c-BN对于SPS烧结Si3N4/BN复相陶瓷结构和性能的影响[J].人工晶体学报,2019,48(6):1116-1122. |
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| 作者姓名： | 胡健 张帆 王为民 傅正义 张金咏 陈文杰 |
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| 作者单位： | 武汉理工大学材料复合新技术国家重点实验室,武汉,430070;湖北航天技术研究院总体设计所,武汉,430034 |
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| 基金项目： | 国家自然科学基金(51672197,51521001,51502220) |
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| 摘 要： | 本研究通过引入立方氮化硼(c-BN),采用放电等离子烧结(SPS)制备Si3N4/BN复合材料,研究了c-BN在高温下的相变对Si3N4/BN复合材料烧结、结构和力学性能的影响。结果表明:在高温下c-BN发生物相转变原位生成的h-BN能够均匀分散在Si3N4基体中,对于Si3N4/BN复合材料的烧结有明显的促进作用,同时对于Si3N4物相转变和晶粒生长的抑制作用小于直接引入到基体中的h-BN。对材料力学性能的分析显示:相较于直接引入h-BN,添加c-BN的复合材料硬度有轻微地下降,而抗弯强度和断裂韧性同时有了明显地提升。
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| 关 键 词： | 立方氮化硼 物相转变 长径比 力学性能 |
Effects of c-BN on Microstructure and Properties of Si3N4/BN Sintered by SPS |
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| HU Jian,ZHANG Fan,WANG Wei-min,FU Zheng-yi,ZHANG Jin-yong,CHEN Wen-jie.Effects of c-BN on Microstructure and Properties of Si3N4/BN Sintered by SPS[J].Journal of Synthetic Crystals,2019,48(6):1116-1122. |
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| Authors: | HU Jian ZHANG Fan WANG Wei-min FU Zheng-yi ZHANG Jin-yong CHEN Wen-jie |
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| Affiliation: | (State Key Lab of Advanced Technology for Materials Synthesis and Processing,Wuhan University of Technology,Wuhan 430070,China;System Design Institute of Hubei Areospace Technology Academy,Wuhan 430034,China) |
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| Abstract: | Si3N4/BN composites were prepared by spark plasma sintering(SPS)with cubic boron nitride(c-BN).The effect of phase transformation of c-BN at high temperature on sintering,microstructure and mechanical properties of Si3N4/BN composites was studied.The results show that the in-situ h-BN formed by phase transformation of c-BN can be uniformly dispersed in the Si 3N 4 matrix at high temperature,which can obviously promote the sintering of Si3N4/BN composites,and the inhibition of phase transformation and growth of Si3N4 grains was less than that of h-BN directly introduced into the matrix.The mechanical properties of the composites show that the hardness of composites with c-BN was slightly decreased,while the flexural strength and fracture toughness were obviously improved compared with that of the composites with h-BN. |
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| Keywords: | cubic boron nitride phase transition aspect ratio mechanical property |
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