Korean Journal of Materials Research (한국재료학회지)

Materials Research Society of Korea (한국재료학회)
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Observation on the Microstructures of Cu-TiB2 Composites with Wear Behavior

Cu-TiB2 복합재료의 마모거동에 따른 미세조직 관찰

  • Lee, Tae-Woo (Department of Materials Science and Engineering, Seoul National University of Technology) ;
  • Kang, Kae-Myung (Department of Materials Science and Engineering, Seoul National University of Technology)
  • 이태우 (서울산업대학교 신소재공학과) ;
  • 강계명 (서울산업대학교 신소재공학과)
  • Published : 2006.08.27
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Abstract

The dispersion hardened $Cu-TiB_2$ composites are a promising candidate for applications as electrical contact materials. The $Cu-TiB_2$ composites for electrical contact materials can reduce material cost and resource consumption caused by wear, due to their good mechanical and electrical properties. In this study, we investigated the wear phenomenon for $Cu-TiB_2$ composites fabricated with hot extrusion, by varying particle sizes and volume fractions of $TiB_2$. The wear tests were performed under the dry sliding condition with a fixed total sliding distance of 40 m. The contact loads at a constant speed of 3.5 Hz were 20, 40, 60, and 80 N. The friction coefficients and wear losses were measured during wear tests. Worn surfaces and wear debris after wear tests were investigated using the scanning electron microscope and the optical microscope. The microstructures of interface between Cu matrix and $TiB_2$ particle before and after wear tests were studied by the transmission electron microscope.

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References

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