Microstructure and mechanical properties of carbon graphite composites reinforced by carbon nanofibers
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서지정보
ㆍ발행기관 : 한국탄소학회
ㆍ수록지정보 : Carbon letters / 33권 / 2호
ㆍ저자명 : Yixing Chen, Chuanjun Tu, Yanli Liu, Ping Liu, Pei Gong, Guangning Wu, Xia Huang, Jian Chen, Tianhua Liu, Jizhou Jiang
ㆍ저자명 : Yixing Chen, Chuanjun Tu, Yanli Liu, Ping Liu, Pei Gong, Guangning Wu, Xia Huang, Jian Chen, Tianhua Liu, Jizhou Jiang
목차
Abstract1 Introduction
2 Experimental section
2.1 Materials
2.2 Surface oxidation and functionalization of CNFs
2.3 Preparation of DAM-CNFs reinforced CGCs
2.4 Mechanical properties and microstructure characterizations
3 Results and discussion
3.1 Surface structure of CNFs and DAM-CNFs
3.2 Dispersion of CNFs in THF
3.3 Effect of DAM-CNFs content on the microstructure of the CGCs
3.4 Effects of DAM-CNFs content on the physical and mechanical properties of the CGCs
4 Conclusions
Acknowledgements
References
영어 초록
Renewed interest in the reinforced carbon graphite composites has intrigued the community in the advanced materials fields. In this work, we present a simple carbon nanofibers reinforced carbon graphite composites synthetic method by incorporating mixture of coal tar pitch, synthetic graphite, pitch coke and the dispersion liquid of carbon nanofibers via liquid-phase mixing process. The impact of carbon nanofiber utilization on the microstructures and mechanical properties of carbon graphite composites are studied systematically. The covalent surface modification of carbon nanofibers effectively improves its microstructure and thereby promotes the carbon graphite composites’ dispersion behavior. We propose that a small amount of carbon nanofibers could promote the carbonization process of carbon graphite composites, facilitating the densification of carbon graphite composites and reducing the undesired open porosity. The amount of 0.7 wt % of carbon nanofiber concentration allows the enhancement of bend and compressive strength of carbon graphite composites up to 36.50 MPa and 60.46 MPa, increased by 167.9% and 146.9% compared with the pure carbon graphite composite, respectively. Our findings can be rationalized due to the improvement in the mechanical strength of carbon graphite composites could be attributed due to pull-out of carbon nanofibers from the matrix and bridging effect across the crack pores within the matrix.참고 자료
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