| S型B4C-SiC/C功能梯度材料的设计和制备 |
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| 引用本文： | 沈卫平,吴波中,李江涛,葛昌纯.S型B4C-SiC/C功能梯度材料的设计和制备[J].北京科技大学学报,2000,22(2):166-169. |
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| 作者姓名： | 沈卫平 吴波中 李江涛 葛昌纯 |
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| 作者单位： | 北京科技大学材料工程与科学学院特陶研究室!北京100083 |
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| 摘 要： | 对（ｌ－×）（８０％Ｂ４ＣＣ－２０％ＳｉＣ）／ｘ Ｃ（体积分数）功能梯度材料的 ×＝０． ２， ０．４， ０．６， ０．８的各层 分别在２０００℃，２０ＭＰａ进行了热压，测定了各层的密度，线膨胀系数，弹性模量和抗弯强度等． 按线性成分分布函数的６层和１１层梯度材料热压后都出现了裂纹．采用了不同于幂函数的Ｓ 型成分分布函数设计，热压了１１层（×＝０．２～１．０）的功能梯度材料，其抗弯强度为２１６ＭＰａ，抗热震 性＞５００℃．
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| 关 键 词： | 功能梯度材料 碳化硼 碳化硅 设计 制备 碳 |
Design and Fabrication of S-Type B_4C-SiC/C Functionally Graded Materials |
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| SHEN Weiping, WUBozhong, LIJiangtao, GE Changchun.Design and Fabrication of S-Type B_4C-SiC/C Functionally Graded Materials[J].Journal of University of Science and Technology Beijing,2000,22(2):166-169. |
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| Authors: | SHEN Weiping WUBozhong LIJiangtao GE Changchun |
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| Abstract: | The x=0.2,0.4,0.6,80 layers of (l -x) (80%B4C-20%SiC) /xC (volume fraction) Functionally Graded Materials were hot-pressed respectively. The density, linear thermal expansion, elastic modulus and flexural strength were tested. There are crackles in FGMs of 6 and 11 layers that are designed by linear function. The S-type function of compositional distribution as a designed method applied to investigate FGM. As a result the flexural strength is 216 MPa and thermal shock resistance A,, >500C for 11 layers (x= 0.2~l) FGMs of S-type. |
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| Keywords: | functionally graded materials S-type composition distribution function B C SiC C |
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