炭基体的结构对C/C复合材料导电性能的影响
Effect of Carbon Matrix Structure on Electrical Properties of C/C Composites
查看参考文献23篇
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文摘
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采用CVI+PIC工艺制备以2D碳纤维预制体为增强体、由不同炭基体结构组成的C/C复合材料,随后在不同温度对其进行热处理得到不同石墨化度的炭基体结构,研究了PyC/ReC比值和石墨化度对材料电阻率的影响.结果表明,随着PyC/ReC比的提高低密度C/C复合材料的电阻率在27.3×10~(-6)~28.0×10~(-6) Ω·m间基本不变,因为石墨微晶的尺寸和结构完整性的增大与材料孔隙率的提高对电阻的影响相反.随着PyC/ReC比的提高,高密度C/C复合材料的电阻率从24.9×10~(-6) Ω·m降低到20.5 ×10~(-6) Ω·m.其可能的原因是,材料内部的孔隙较少,孔隙率的轻微提高使阻碍载流子在导电网络中的有效传递的作用显著下降.随着热处理温度从1800℃提高到2500℃,C/C复合材料的石墨化度明显提高,电阻率明显降低,其主要原因是载流子浓度的提高和晶界散射的减弱。 |
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其他语种文摘
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C/C composites with different carbon matrix structures were prepared by CVI(chemical vapor infiltration) +PIC(resin precursor impregnation cracking) process using 2D carbon fiber needlepunched preforms as reinforcement and then were heat-treated at different temperatures. The effect of PyC (pyrolysis carbon)/ReC (resin carbon) ratio and degree of graphitization on the electrical resistivity of the composites was investigated. The results show that the electrical resistivity of the C/C composites of low density remains basically unchanged in a range of 27.3×10~(-6)~28.0×10~(-6) Ω·m with the increase of PyC/ReC, which can be mainly attributed to the opposite effect of the increase of lattice size and structural integrity of graphite microcrystals and the increase of porosity of the composites. However, the electrical resistivity of C/C composites of high density decreases from 24.9×10~(-6) Ω·m to 20.5×10~(-6) Ω·m with the increase of PyC/ReC ratio. Because the slight increase of the porosity has a small contribution on the difference of electrical resistivity by hindering the effective carrier transfer in the conductive network for the C/C composites of low porosity. The graphitization degree of C/C composites increases and the electrical resistivity decreases with the heat treatment temperature increased from 1800℃ to 2500℃, which can be mainly attributed to the increase of carrier concentration and the weakening of grain boundary scattering. |
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来源
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材料研究学报
,2019,33(12):935-941 【核心库】
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DOI
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10.11901/1005.3093.2019.321
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关键词
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复合材料
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电阻率
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炭基体
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石墨化
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地址
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1.
中国科学院金属研究所, 沈阳, 110016
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中国空间技术研究院总体部, 北京, 100094
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语种
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中文 |
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文献类型
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研究性论文 |
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ISSN
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1005-3093 |
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学科
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一般工业技术 |
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基金
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装备预研基金
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青促会优秀会员人才项目
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国家自然科学基金
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国家重点研发计划
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文献收藏号
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CSCD:6638070
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参考文献 共
23
共2页
|
|
1.
Birakayala N. A reduced reaction model for carbon CVD/CVI processes.
Carbon,2002,40(5):675
|
CSCD被引
8
次
|
|
|
|
|
2.
李翠云. 碳／碳复合材料的应用研究进展.
化工新型材料,2006,34(3):18
|
CSCD被引
28
次
|
|
|
|
|
3.
Savage E.
Carbon-Carbon Composites,1993
|
CSCD被引
1
次
|
|
|
|
|
4.
李贺军. 炭 /炭复合材料.
新型炭材料,2001,16(2):79
|
CSCD被引
161
次
|
|
|
|
|
5.
Gajiwala H M. Hybridized resin matrix approach applied for development of carbon/carbon composites-I.
Carbon,1998,36(7/8):903
|
CSCD被引
13
次
|
|
|
|
|
6.
Vaidya U K. NDE of structural and functional carbon-carbon composites after first carbonization.
J. Adv. Mater,1995,26(2):41
|
CSCD被引
2
次
|
|
|
|
|
7.
孙天鸣. 孔隙率对炭材料电阻率的影响.
新型炭材料,2013,28(5):349
|
CSCD被引
2
次
|
|
|
|
|
8.
张福勤. C/C复合材料石墨化度与导电性能的关系.
新型炭材料,2001(2):45
|
CSCD被引
35
次
|
|
|
|
|
9.
胡钢. 炭/炭复合材料微观结构对热电性能的影响.
无机材料学报,2015,30(4):357
|
CSCD被引
2
次
|
|
|
|
|
10.
焦圆. 新型多孔碳材料的制备和性能.
材料研究学报,2017,31(12):881
|
CSCD被引
1
次
|
|
|
|
|
11.
Hsien Lin Hu. Changes in the microstructure and characteristics of carbon/carbon composites with mesophase mesocarbon microbeads added during graphitization.
Journal of Applied Polymer Science,2010,98(5):2178
|
CSCD被引
1
次
|
|
|
|
|
12.
Can Z. Catalytic graphitization of carbon/carbon composites by lanthanum oxide.
Journal of Rare Earths,2012,30(2):128
|
CSCD被引
1
次
|
|
|
|
|
13.
Yang F C. The effect of catalyzer in the matrix on the structure and performance of carbon/carbon composite.
Journal of Composite Materials,2013,47(4):409
|
CSCD被引
1
次
|
|
|
|
|
14.
金政. 石墨化度及纤维含量对C／C复合材料性能的影响.
材料科学与工艺,2007,15(2):225
|
CSCD被引
1
次
|
|
|
|
|
15.
Bourrat X. Regenerative laminar pyrocarbon.
Carbon,2002,40:2931
|
CSCD被引
12
次
|
|
|
|
|
16.
周绍建. 树脂炭含量对C/C复合材料性能的影响.
新型炭材料,2001(1):49
|
CSCD被引
5
次
|
|
|
|
|
17.
Tang S F. Ablation properties of C/C composites with various needled preforms prepared by isothermal chemical vapor infiltration.
South Univ. Technol,2007,14(1):13
|
CSCD被引
5
次
|
|
|
|
|
18.
吴小军. 树脂浸渍炭化过程中C/C复合材料孔隙演化.
金属学报,2009,45(11):1402
|
CSCD被引
6
次
|
|
|
|
|
19.
Faißt A. Electrical resistance and magnetoresistance of pyrocarbon at low temperatures in fields up to 14 Tesla.
Carbon,2002,40(3):321
|
CSCD被引
1
次
|
|
|
|
|
20.
Barykin B M.
Electrical conductivity of glass-carbon. Nasa Sti/recon, Technical Report N,1977:77
|
CSCD被引
1
次
|
|
|
|
|
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