Cr-si co-doped dlc protective coating and method for producing the same
By constructing a Cr-Si dual-element synergistic doped DLC protective coating in surface engineering, the stability and wear resistance of the coating under high load or fretting wear conditions were improved, the friction coefficient was reduced, and the film-substrate bonding strength was increased.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
- Filing Date
- 2026-06-15
- Publication Date
- 2026-07-17
AI Technical Summary
Existing diamond-like carbon films tend to accumulate extremely high internal stress during deposition, resulting in limited film-substrate bonding strength and difficulty in maintaining stability under high load or fretting wear conditions. Traditional doping modification methods are unable to achieve synergistic optimization between reducing internal stress, improving bonding strength, and low friction characteristics.
A Cr-Si dual-element synergistic doped DLC protective coating is adopted. By constructing a single-layer micro-composite structure in which a rigid CrC nanophase and a flexible Si-C amorphous network coexist, combined with a Cr/CrC gradient transition layer and a Cr/Si-DLC functional layer, the internal residual stress is released and the film-substrate bonding strength is improved.
This study improved the stability and wear resistance of the coating under high load or fretting wear conditions, reduced the coefficient of friction, and increased the film-substrate bonding strength.
Smart Images
Figure CN122406154A_ABST