The Influence of Carbon Fiber Heat Treatment Temperature on Carbon-Carbon Brakes Characteristics

서지정보

ㆍ발행기관 : 한국탄소학회 ㆍ수록지정보 : Carbon Letters / 14권 / 1호
ㆍ저자명 : AndreyGaliguzov, ArtemMalakho, ValeryKulakov, AnatolyKenigfest, EvgenyKramarenko, ViktorAvdeev

목차

1. Introduction
2. Experiment
2.1. Materials
2.2. Preparation of C/C composites
2.3. Characterization of composite materials
3. Results and Discussion
4. Conclusions
Acknowledgements

영어 초록

The effects of heat treatment temperature (HTT) of polyacrylonitrile-based carbon fiber (CF) on the mechanical, thermal, and tribological properties of C/C composites were investigated. It was found that HTT (graphitization) of CF affects the thermal conductivity and mechanical and tribological characteristics of C/C composites. Thermal treatment of fibers at temperatures up to 2800°C led to a decrease of the wear rate and the friction coefficient of C/C composite-based discs from 7.0 to 1.1 μm/stop and from 0.356 to 0.269, respectively. The friction surface morphology and friction mechanism strongly depended on the mechanical properties of the CFs. The relief of the friction surface of composites based on CFs with final graphitization was also modified, compared to that of composites based on initial fibers. This phenomenon could be explained by modification of the abrasive wear resistance of reinforcement fibers and consequently modification of the friction and wearing properties of composites. Correlation of the graphitization temperature with the increased flexural and compressive strength, apparent density, and thermal conductivity of the composites was also demonstrated.

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