EFFECT OF EMBEDDED TUNGSTEN PARTICLES ON IMPACT RESISTANCE OF DIAMOND COATING

Naichao Chen, Dongmei Liu (), Fan Zhou (), Ping He () and Musen Liu ()
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Naichao Chen: School Energy and Mechanical Engineering, Shanghai University of Electric Power, Shanghai 200090, P. R. China†Shanghai Key Laboratory of Materials Protection and Advanced Materials in Electric Power, Shanghai 200090, P. R. China
Dongmei Liu: School Energy and Mechanical Engineering, Shanghai University of Electric Power, Shanghai 200090, P. R. China
Fan Zhou: School Energy and Mechanical Engineering, Shanghai University of Electric Power, Shanghai 200090, P. R. China
Ping He: School Energy and Mechanical Engineering, Shanghai University of Electric Power, Shanghai 200090, P. R. China
Musen Liu: School Energy and Mechanical Engineering, Shanghai University of Electric Power, Shanghai 200090, P. R. China

Surface Review and Letters (SRL), 2021, vol. 28, issue 11, 1-12

Abstract: For diamond coating, natural fragile property easily leads to fracture, delamination and peeling, which seriously inhibits the applications in many industrial fields. In order to prolong the lifetime, improving the toughness under impact load is essential for diamond coating. In this work, a novel method was proposed by the conventional CVD diamond technique combining with the particles, with which the nanocrystalline diamond (NCD) coating with W particles (W-NCD) was fabricated to evaluate the impact behavior. The pure NCD coating was also produced for comparison. Repeating impact testing was performed to evaluate the impact resistance of the as-deposited NCD coatings. The results showed that the diamond coating can be fabricated on the substrate with W particles. The indentation scar revealed that the W-NCD coating had the stronger impact resistance than the NCD coating. Ratcheting effect was employed to discuss the impact properties of NCD coating for the first time. The coating integrity played a vital role in ratcheting displacement. Repeating impact can make the NCD and W-NCD coatings soft, and the W particles can accelerate the softening process. Hence, embedding particles can provide a potential and valid method to enhance the impact resistance of diamond coating that was very important for the fragile coating.

Keywords: Diamond; coating; particles; impact resistance (search for similar items in EconPapers)
Date: 2021
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DOI: 10.1142/S0218625X21501080

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