Self-lubricating SiC matrix composite
Agnieszka Gubernat, Ludosław Stobierski, Sławomir Zimowski, Paweł Hydzik
Quarterly No. 4, 2012 pages 219-227
DOI:
keywords: pressureless sintering, SiC matrix composite, face seal, self-lubricant, solid lubricant
abstract The research presented here was devoted to the pressureless sintering of composites consisting of a SiC matrix and intentionally introduced particles of solid lubricants as a dispersed phase. The goal of using such materials is to achieve a selflubrication effect in friction seal elements during sliding contact. In the first part of the investigations, the optimal conditions of sintering, as well as the best composition and concentration of the solid lubricants were established. The second part of the work consisted in characterizing such mechanical and tribological properties of the materials as: hardness (HV and HK), bending strength, abrasive wear resistance, friction coefficient and linear wear in contact parts made of homonymous and heteronymous materials. Based on the tribological and mechanical studies correlated with microstructure investigations (SEM), the material fulfilling the requirements for the construction of self-lubricating seal elements was selected.