Abstract
The effect of surface conditions and secondary phase addition on the dry sliding friction and wear characteristics of five yttria-stabilized ZrO2-based composites with 40 vol% WC, TiCN or TiN was investigated using an ASTM G133 pin-on-flat sliding contact configuration. WC–6wt%Co-cemented carbide pins were used as mating material. The friction and wear level were higher for wire-EDMed ZrO2-based composites compared to their equivalent ground specimens. This finding could be correlated to flexural strength measurements, revealing strong discrepancy between wire-EDMed and ground surfaces. The most favorable tribological characteristics were encountered with ZrO2–WC composites compared to ZrO2–TiCN and ZrO2–TiN grades.
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