| WU Shi-guo,LUO Rui-ying.Effect of Fiber Type on the Friction and Wear Properties of C/ C Composites[J],45(2):84-89 |
| Effect of Fiber Type on the Friction and Wear Properties of C/ C Composites |
| Received:November 20, 2015 Revised:February 20, 2016 |
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| DOI：10.16490/j.cnki.issn.1001-3660.2016.02.013 |
| KeyWord:C / C composites pre oxygen fiber chemical vapor deposition rough pyrolysis carbon load friction and wear |
| Author | Institution |
| WU Shi-guo |
Beihang University, Beijing ,China |
| LUO Rui-ying |
Beihang University, Beijing ,China |
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| Abstract: |
| Objective In order to reduce the manufacturing cost of C/ C composite materials, and expand the application field of C / C composite materials, two kinds of C / C composite materials were prepared, and the effect of fiber type on the friction and wear properties of C / C composites was studied. Methods Two kinds of C / C composite materials with two different kinds of fiber materials were prepared by CVI process. The friction and wear behaviors of the two materials in different friction pairs were studied using the MM-2000 friction test machine, and the morphology analysis of the friction surface was conducted using SEM. Results The results showed that:with the increase of load, the friction coefficient between pre oxygen basal C / C composites and metal remained at about 0. 22, with an average wear loss of 0. 82 mg / min; The carbon fiber basal C / C composites and metal had a relatively low coefficient of friction (0. 15 ~ 0. 20), and the friction coefficient changed with the load fluctuation because of the occurrence of abrasive wear behavior in the process. The average wear amount was 1. 17 mg / min. For a pair of C / C composites, the friction coefficient between pre oxygen basal C / C and pre oxygen basal C / C composites ranged 0. 28 ~ 0. 33, which was relatively stable, with an average wear of 1. 76 mg / min; With the increase of load, the friction coefficient of carbon fiber basal composite and carbon fiber composite varied in a relatively large range (0. 15 ~ 0. 33), besides the average amount of wear was 2. 35 mg / min; The wear between pre oxygen basal composite and carbon fiber basal composite was the biggest, with an average wear amount of 2. 95 mg / min. Conclusion The friction and wear properties of C / C composites were greatly related to the fiber type, and the C / C composites prepared by the pre oxygen fiber were easy to form a stable lubricating film. With the increase of load, the fluctuation range of the friction coefficient was relatively small, and the wear and friction work was also the lowest. The friction properties of carbon fiber based C / C composites were more excellent. The friction properties of pre oxygen basal C / C composites were superior to those of the carbon fiber based C / C composites. |
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