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<p>Carbon fiber-reinforced plastics (CFRP) are widely used due to their excellent properties, and drilling is essential for their manufacturing. While previous studies have optimized drill geometry and extended tool life with chemical vapor deposition (CVD) diamond coatings, the wear mechanisms of these coatings remain insufficiently understood. This study examines the wear behavior of microcrystalline diamond (MCD) and nanocrystalline diamond (NCD) coatings in CFRP drilling using Raman spectroscopy. Spectral analysis confirms that graphitization is the primary factor influencing wear. The results indicate that NCD-coated drills maintain performance longer with minimal spectral shifts, whereas MCD-coated drills experience accelerated wear due to increased graphitization. These findings provide insight into diamond coating degradation, contributing to the development of more durable CFRP drilling tools.</p>

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Analysis of wear resistance differences between microcrystalline and nanocrystalline diamond coatings in cutting tools for carbon fiber-reinforced plastics

  • 期刊论文

  • 发表日期：

    2025年7月8日

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  • Byeong-Chan Kwon,
  • Dong-Gyu Kim

摘要

Carbon fiber-reinforced plastics (CFRP) are widely used due to their excellent properties, and drilling is essential for their manufacturing. While previous studies have optimized drill geometry and extended tool life with chemical vapor deposition (CVD) diamond coatings, the wear mechanisms of these coatings remain insufficiently understood. This study examines the wear behavior of microcrystalline diamond (MCD) and nanocrystalline diamond (NCD) coatings in CFRP drilling using Raman spectroscopy. Spectral analysis confirms that graphitization is the primary factor influencing wear. The results indicate that NCD-coated drills maintain performance longer with minimal spectral shifts, whereas MCD-coated drills experience accelerated wear due to increased graphitization. These findings provide insight into diamond coating degradation, contributing to the development of more durable CFRP drilling tools.