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Reciprocating sliding tribology of brake oil treated carbon fiber reinforced ceramic matrix composites

Transactions of Nonferrous Metals Society of China 2019年第9期29卷 1903-1913页

作者： parshant kumar Vijay kumar SRIVASTAVA Department of Mechanical Engineering Indian Institute of Technology (Banaras Hindu University)

The effect of brake oil on sliding behavior of carbon/carbon(C/C) and carbon/carbon-silicon carbide(C/C-SiC) composites was investigated with the variation of laminate orientation and surface conformity. The partial and low conformity contacts with the normal and parallel orientations of laminates were considered. The normal load was varied from 50 to 90 N in a step of 10 N. The friction and wear behavior was investigated under reciprocating sliding conditions. The results showed that friction coefficient and wear loss of composites with normal orientation of laminates were larger as compared to those of composites with parallel orientation of laminates. C/C composites with normal orientation of laminates yielded the highest value of friction coefficient. Wear loss decreased by a maximum of 78%, and friction coefficient decreased by a maximum of 49% in low conformity contacts as compared to partial conformity contacts. The presence of brake oil reduced the adhesion tendency of compacted wear debris because the formation of friction film was difficult, and thus, friction behavior was affected. The wear debris retention between the contact surfaces due to confined area motion in reciprocating sliding depicted the tribological behavior.

关键词： reciprocating sliding tribology C/C composites C/C-SiC composites friction coefficient wear resistance laminate orientation

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Tribological behaviour of C/C-SiC composites-A review

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Journal of Advanced Ceramics 2016年第1期5卷 1-12页

作者： parshant kumar V.K.SRIVASTAVA Department of Mechanical Engineering Indian Institute of Technology(BHU) Varanasi-221005 India

Ceramic matrix composites made of carbon fibres and carbon matrix (C/C) are generally used for aircraft structures and brake discs due to their low density, and good thermal, mechanical, and tribological properties. Silicon carbide (SiC) can be introduced to the matrix to improve the performance of C/C composites, because it increases the hardness and thermal stability, and decreases the chemical reactivity, which leads to the improvement of tribological properties of C/C composites. Thus carbon–carbon silicon carbide (C/C–SiC) composites can be used at high temperature for the application of brake discs, friction clutches, etc. C/C–SiC composites are fabricated by three different methods: (i) chemical vapour infiltration (CVI), (ii) polymer infiltration and pyrolysis (PIP), and (iii) liquid silicon infiltration (LSI), among which LSI method is widely used for the fabrication of C/C–SiC composites due to higher mechanical and thermal properties.

关键词： carbon-carbon (C/C) composites coefficient of friction wear

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