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Ceramic Composites With SiC Matrix Produced By Liquid Silicon Infiltration Process For Frictional Applications

Victor I. Kulik 1Alexey S. Nilov 1Anatoliy P. Garshin 2Vadim Savich 3Nikolay A. Shipitsa 3Alexandr P. Ilyuschenko 3Alexandr A. Dmitrovich 3

1. Baltic State Technical University (BSTU), 1st Krasnoarmeyskaya st. 1, Saint-Petersburg 190005, Russian Federation
2. St.-Petersburg State Polytechnical University, Saint-Petersburg 194064, Russian Federation
3. Research institute of powder metallurgy, Platonova 41, Minsk 220071, Belarus

Abstract

The present work is on production of silicon carbide-based ceramic matrix composites (CMC) reinforced with carbon fibers, the so called Сf/SiС-composites. Because of the extreme hardness and high abrasion resistance of SiC such CMCs belong to the most promising advanced materials for frictional applications. In particular Сf/SiС-composites-based brake disks and pads for passenger cars have been developed in the last few years. An efficient way to obtain Сf/SiС-composites is a methods based on Liquid Silicon Infiltration (LSI) process. In this work the production of the Сf/SiС-composite involved forming the Cf-reinforced plastic preforms from chopped carbon fibre and phenolic resin, carbonization of the perform to produce Cf-reinforced coke matrix (Сf/С-composite) with subsequent perform siliconizing by silicon melt. The phenolic resin contained powdered carbon, silicon carbide and other fillers. Different CMC samples were produced with varying composition and ratio of initial components. The obtained CMC samples were characterized for their residual porosity, composition, microstructure, mechanical and tribotechnical prameters. Mechanical tests were used to determine the flexural strength and fracture toughness of the CMCs. Tribotechnical parameters (coefficient of friction and wear) were measured on the inertial stands which allow carrying out tests of frictional materials by the “plane-plane” scheme in conditions maximally close to real friction centres (frictional coupling, braces, clutches and etc.). Tribotechnical tests of Сf/SiС-composite have been carried out in combination with different riders. The correlation between the initial composition of the composite and its microstructure, physical-mechanical and tribotechnical properties is found and discussed.

 

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Related papers

Presentation: Poster at E-MRS Fall Meeting 2008, Symposium I, by Victor I. Kulik
See On-line Journal of E-MRS Fall Meeting 2008

Submitted: 2008-05-20 13:46
Revised:   2009-06-07 00:48