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In this paper, the sample of Ag-C composite coating for 550 kV GIL was prepared by discharge plasma sintering (Spark Plasma Sintering, SPS). The hardness, wear resistance, thermal conductivity and other properties of Ag-C coating samples under different graphite content were analyzed to find the best ratio of Ag-C coating. The results show that the thermal conductivity of Ag-C samples decreases with the increase of graphite mass fraction, and the friction coefficient increases first and then stabilizes with time. The friction coefficient of Ag-C samples with 3% graphite content increases first and then stabilizes with time, and the difference of hardness values in different regions decreases gradually. Under the condition of graphite particle size of 4μm, the wear resistance of the Ag-C sample with 7% graphite content is the best, and the overall performance of the contact material can be improved. The research content of this paper can provide reference for the preparation process of GIL contact.

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Study on Properties of Composite Coating for Spring Contact Finger of 550 kV GIL

  • 会议论文

  • 发表日期：

    2025年

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  • Qishen Lv,
  • Fan Zhang,
  • Liguang Hu,
  • Zhiren Tian,
  • Shuo Chen,
  • Ruodong Huang

摘要

In this paper, the sample of Ag-C composite coating for 550 kV GIL was prepared by discharge plasma sintering (Spark Plasma Sintering, SPS). The hardness, wear resistance, thermal conductivity and other properties of Ag-C coating samples under different graphite content were analyzed to find the best ratio of Ag-C coating. The results show that the thermal conductivity of Ag-C samples decreases with the increase of graphite mass fraction, and the friction coefficient increases first and then stabilizes with time. The friction coefficient of Ag-C samples with 3% graphite content increases first and then stabilizes with time, and the difference of hardness values in different regions decreases gradually. Under the condition of graphite particle size of 4μm, the wear resistance of the Ag-C sample with 7% graphite content is the best, and the overall performance of the contact material can be improved. The research content of this paper can provide reference for the preparation process of GIL contact.