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Effects of boron addition on some properties of hard-type carbons

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Abstract

The boron-containing hard-type (HT) carbons were prepared by heating the raw coke compacts with 1.6 wt% boron at temperatures ranging from 1000 to 2800° C. Some physical and mechanical properties of boron-doped HT carbons have been measured and compared with those for boron-free materials. It was confirmed that the boron enters the HT carbon at a relatively low temperature of 1400° C and enhances the densification process of compacts during heat-treatment above 1800° C. The addition of boron caused increases in Young's modulus and thermal conductivity, and decreases in hardness and electrical conductivity of HT carbons. The effects are discussed, and compared with those for graphitizable carbons.

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Authors and Affiliations

  1. Government Industrial Research Institute, Kyusyu Shuku-machi, Tosu-shi, 841, Saga, Japan

    Tsuyoshi Hagio, Ichitaro Ogawa & Kazuo Kobayashi

Authors
  1. Tsuyoshi Hagio
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  2. Ichitaro Ogawa
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  3. Kazuo Kobayashi
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Hagio, T., Ogawa, I. & Kobayashi, K. Effects of boron addition on some properties of hard-type carbons. J Mater Sci 21, 4147–4150 (1986). https://doi.org/10.1007/BF01106521

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  • DOI: https://doi.org/10.1007/BF01106521

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