Title: Tribological Behaviour of the Si/SiC and the Si/SiC/Graphite Composites
Abstract:The dense sintered bodies of Si/SiC composite with various Si contents could be fabricated by changing the green density in the forming process. The Si/SiC/graphite composites with various graphite co...The dense sintered bodies of Si/SiC composite with various Si contents could be fabricated by changing the green density in the forming process. The Si/SiC/graphite composites with various graphite contents could be also fabricated by changing a graphite content in the starting composition. Their mechanical and tribological properties were characterized and wear mechanism was also studied. The hardness and strength of the Si/SiC and the Si/SiC/graphite were decreased with increasing the contents of free Si and graphite, respectively. However, the friction coefficient and specific wear rate had no specific relations to their hardness and strength. Adhesion of free Si was a main factor to determine a wear resistance of the Si/SiC composite. In the case of the Si/SiC/graphite, solid lubrication and liquid reservoir of the graphite particles played the main role of the reduction of the friction force. In the torque test to estimate the possibility of practical applications, the value of torque between the Al₂O₃ disk and Si/SiC/graphite disk was 1/6 lower compared with two Al₂O₃ disks on the basis of 100,000 cycles.Read More
Publication Year: 1997
Publication Date: 1997-03-01
Language: en
Type: article
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