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Effects of matrix characteristics on diamond composites

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Abstract

A series of cobalt-matrix diamond composites was fabricated by hot pressing, and their microstructure, physical properties, transverse rupture strength and resulting fracture surface were studied in detail. Segments of the diamond composites were manufactured, and a one-segment circular sawblade was used for the evaluation of the sawing performance. Results show that the fracture surface of composites containing a cobalt matrix exhibits an excellent ductile appearance, while the fracture surface of composites containing an additive of tin powder in the cobalt matrix displays a less ductile behaviour due to the existence of a tin-rich brittle phase. It is also found that a diamond composite having low porosity, high hardness, and less surface attack of diamond particles will result in a low value of radial sawblade wear.

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Authors and Affiliations

  1. Department of Mechanical Engineering, National Taiwan University, Taipei, Taiwan

    Y. S. Liao & S. Y. Luo

Authors
  1. Y. S. Liao
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  2. S. Y. Luo
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Liao, Y.S., Luo, S.Y. Effects of matrix characteristics on diamond composites. J Mater Sci 28, 1245–1251 (1993). https://doi.org/10.1007/BF01191959

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  • DOI: https://doi.org/10.1007/BF01191959

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