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樹脂碳包覆石墨/銅復合材料組織和性能研究
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中南大學 粉末冶金國家重點實驗室

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中圖分類號:

TG146.1

基金項目:

動車組前瞻技術研究資助項目(2016J011-G);動車組關鍵技術提升研究資助項目(2017J008-M);國家重點研發(fā)計劃資助項目(2016YFB0301403);國家自然科學青年基金資助項目(51501228)


Microstructures and properties of resin carbon-coated graphite/copper composites
Author:
Affiliation:

State Key Laboratory of Powder Metallurgy, Central South University

Fund Project:

Eemu Forward-looking Technology Research Project of China (No. 2016J011-G), National Key Research and Development Program of China (No. 2016YFB0301403), Key Technology Improvement of EMU-Research on the Domestication of Carbon Contact Strip (No. 2017J008-M), National Natural Science Foundation of China (No. 51501228)

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    摘要:

    為低成本制備高性能石墨/銅復合材料,以酚醛樹脂包覆石墨粉、電解銅粉、二氧化硅為原料,采用傳統(tǒng)的粉末冶金工藝制備了樹脂碳包覆石墨/銅復合材料,對比了其與天然鱗片石墨/銅復合材料和鍍銅石墨/銅復合材料組織和性能的差異。發(fā)現酚醛樹脂包覆可有效保護石墨結構完整性,還原銅表面氧化膜,促進銅的擴散燒結,利于致密化。與天然鱗片石墨/銅復合材料相比,樹脂碳包覆石墨/銅復合材料的導電性能、力學性能和摩擦磨損性能提高,其電導率、抗彎強度和硬度分別為9.87 MS.m-1、81 MPa、22 HV,與鍍銅石墨/銅復合材料的相當,且摩擦磨損性能略優(yōu)于鍍銅石墨/銅復合材料。

    Abstract:

    According to the purposes of high properties of graphite/copper composites, resin carbon-coated graphite/copper composites were fabricated by using phenolic resin-coated graphite, electrolytic copper, silica as raw materials via traditional powder metallurgy method. The difference of the microstructures and properties compared with natural graphite/copper composites and copper-coated graphite/copper composites was researched. The results indicated that the structure of graphite can be protected through phenolic resin. Phenolic resin can break up the oxide layer on the Cu powder surfaces. The reduced Cu can accelerate the elements’ diffusion and sintering between the Cu particles and increase the sintering densification of the Cu matrix. Compare to the natural graphite/copper composites, the physical, mechanical and tribological properties of resin carbon-coated graphite/copper composites improved. The electrical conductivity, flexural strength, hardness are 9.87 MS·m-1, 81 MPa, 22 HV, respectively. These property values are equivalent to copper-coated graphite/copper composites, and tribological properties is a litter better than copper-coated graphite/copper composites.

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肖鵬,姜許,朱佳敏,劉灘,方華嬋.樹脂碳包覆石墨/銅復合材料組織和性能研究[J].稀有金屬材料與工程,2019,48(10):3265~3274.[xiao peng, Jiang Xu, zhu jiamin, Liu tan, fang hua chan. Microstructures and properties of resin carbon-coated graphite/copper composites[J]. Rare Metal Materials and Engineering,2019,48(10):3265~3274.]
DOI:10.12442/j. issn.1002-185X.20180426

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  • 收稿日期:2018-04-26
  • 最后修改日期:2018-05-18
  • 錄用日期:2018-05-21
  • 在線發(fā)布日期: 2019-11-01
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