Commenced in January 2007
Frequency: Monthly
Edition: International
Paper Count: 30063
Moderation in Temperature Dependence on Counter Frictional Coefficient and Prevention of Wear of C/C Composites by Synthesizing SiC around Surface and Internal Vacancies

Authors: Noboru Wakamoto, Kiyotaka Obunai, Kazuya Okubo, Toru Fujii

Abstract:

The aim of this study is to moderate the dependence of counter frictional coefficient on temperature between counter surfaces and to reduce the wear of C/C composites at low temperature. To modify the C/C composites, Silica (SiO2) powders were added into phenolic resin for carbon precursor. The preform plate of the precursor of C/C composites was prepared by conventional filament winding method. The C/C composites plates were obtained by carbonizing preform plate at 2200 °C under an argon atmosphere. At that time, the silicon carbides (SiC) were synthesized around the surfaces and the internal vacancies of the C/C composites. The frictional coefficient on the counter surfaces and specific wear volumes of the C/C composites were measured by our developed frictional test machine like pin-on disk type. The XRD indicated that SiC was synthesized in the body of C/C composite fabricated by current method. The results of friction test showed that coefficient of friction of unmodified C/C composites have temperature dependence when the test condition was changed. In contrast, frictional coefficient of the C/C composite modified with SiO2 powders was almost constant at about 0.27 when the temperature condition was changed from Room Temperature (RT) to 300 °C. The specific wear rate decreased from 25×10-6 mm2/N to 0.1×10-6 mm2/N. The observations of the surfaces after friction tests showed that the frictional surface of the modified C/C composites was covered with a film produced by the friction. This study found that synthesizing SiC around surface and internal vacancies of C/C composites was effective to moderate the dependence on the frictional coefficient and reduce to the abrasion of C/C composites.

Keywords: C/C composites, frictional coefficient, SiC, wear.

Digital Object Identifier (DOI): doi.org/10.5281/zenodo.1129658

Procedia APA BibTeX Chicago EndNote Harvard JSON MLA RIS XML ISO 690 PDF

References:


[1] W.Buchgraber, Carbon/Carbon Composite Friction Discs for Aerospace, Mat.-wiss. u. Werkstofftech. 34, pp.317–321, 2003
[2] Norio Iwashita, Yoshihiro Sawada, Effect of Oxidative Surface and Sizing Treatments of Carbon Fiber on Tensile Strength of C/C Composites, Journal of Society of Material Science, Japan, Vol.58, No.5, pp.402-407, 2009
[3] Haytam Kasem, Sylvie Bonnamy, Yves Berthier, Pascale Jacquemard, Fiber–matrix unbonding and plastic deformation in C/C composites under tribological loading, Wear Vol.269, pp.104–111, 2010
[4] Xuan Zhou, Dongmei Zhu, Qiao Xie, Fa Luo, Wancheng Zhou, Friction and wear properties of C/C–SiC braking composites, Ceramics International Vol.38, pp.2467–2473, 2012
[5] Christopher Byrne, Zhiyuan Wang, Influence of thermal properties on friction performance of carbon composites, Carbon Vol.39 pp. 1789–1801, 2012
[6] Kiyotaka Obunai, Kazuya Okubo, Toru Fujii, Synthesization of CNT on Surface of C/C Composites to Stabilize the Coefficient of Friction through a Wide Environmental Temperature Range, Journal of Materials Science Research; Vol.2, No.1; pp.15-22, 2013
[7] Xiang Zhang, Ke-Zhi Lin, He-Jun Li, Ye-Wei Fu, Jie Fei, Tribological and mechanical properties of glass fiber reinforced paper-based composite friction material, Tribology International Vol.69, pp.156–167 2014
[8] Lu Yafei, A combinatorial approach for automotive friction materials: Effects of ingredients on friction performance, Composites Science and Technology Vol.66, Issues 3-4, pp.591-598, 2006.