Wear-resistant and stable low-friction nanodiamond composite superhard coatings against Al2O3 counter-body in dry condition

Mohamed Ragab Diab, Koki Murasawa, Ahmed Mohamed Mahmoud Ibrahim, Hiroshi Naragino, Tsuyoshi Yoshitake, Mohamed Egiza

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

Conventional machining lubricants pose environmental hazards and increase production costs. This study addresses this challenge by investigating nanodiamond composite (NDC) coatings deposited on WC–Co substrates as a lubricant-free alternative for sustainable machining. The NDC films show superior hardness (65 GPa) compared to the substrate (22 GPa) and enhanced adhesion (HF2). The NDC's unique self-lubrication results in a low and stable friction coefficient (COF ≤ 0.095) and exceptional wear resistance (7.45 × 10−8 mm3/N·m) in dry tesing against Al2O3 counter-body. Compared to CVD diamond, NDC coatings show a 47.8 % reduction in COF and a 31.65 % enhancement in wear resistance, promoting environmentally friendly machining practices.

Original languageEnglish
Article number106955
JournalInternational Journal of Refractory Metals and Hard Materials
Volume126
DOIs
Publication statusPublished - Jan 2025

All Science Journal Classification (ASJC) codes

  • Ceramics and Composites
  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

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