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<p>Self-sintering technology is a promising technology for preparing carbon or carbon-related materials with high strength and density, and the resulting materials are well suited for mechanical seals. In the present work, the self-sintering behavior of uncalcined materials (the raw materials used in this work), including mesophase carbon microbeads (MCMBs), pitch coke, and petroleum coke was studied. Characterization techniques including XRD, TG-DSC, and SEM were used for analysis. The results showed that decreasing the calcination heating rate from 2 to 0.2 °C/min significantly influenced the volume shrinkage of the samples. Among the three materials, MCMBs exhibited the largest increase in volume shrinkage rate, rising from 21.5 to 27.8%, while the other two materials showed little response to the heating rate change. When the calcination temperature was between 1200 and 2000 °C, the hardness of all samples increased with temperature, peaking at 2000 °C with values of 92 Hs (MCMBs), 78 Hs (pitch coke), and 42 Hs (petroleum coke). However, the hardness started to decrease when the temperature exceeded 2000 °C.</p>

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Study on the Self-sintering behavior of Uncalcined Materials toward Outstanding Mechanical Seal Performance

  • 期刊论文

  • 发表日期：

    2025年9月2日

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  • Mingyang Li,
  • Zhang Wu,
  • Kun Luo

摘要

Self-sintering technology is a promising technology for preparing carbon or carbon-related materials with high strength and density, and the resulting materials are well suited for mechanical seals. In the present work, the self-sintering behavior of uncalcined materials (the raw materials used in this work), including mesophase carbon microbeads (MCMBs), pitch coke, and petroleum coke was studied. Characterization techniques including XRD, TG-DSC, and SEM were used for analysis. The results showed that decreasing the calcination heating rate from 2 to 0.2 °C/min significantly influenced the volume shrinkage of the samples. Among the three materials, MCMBs exhibited the largest increase in volume shrinkage rate, rising from 21.5 to 27.8%, while the other two materials showed little response to the heating rate change. When the calcination temperature was between 1200 and 2000 °C, the hardness of all samples increased with temperature, peaking at 2000 °C with values of 92 Hs (MCMBs), 78 Hs (pitch coke), and 42 Hs (petroleum coke). However, the hardness started to decrease when the temperature exceeded 2000 °C.