Enhancement of impact resistance of CVD diamond coating by multilayer strategy

Abstract

Poor impact resistance of diamond coating has limited its wide application. In this work, a experimental analysis was conducted to explore the effect of multilayer strategy on impact behaviour of diamond coating. Multilayer diamond coating facilitated the enhancement of impact resistance. Thereafter, four types of chemical vapor deposition coating were deposited to further verify the impact resistance of multilayer diamond coating. Scanning electron microscopy, Raman spectrometer and X-ray diffraction equipment were used to characterize the diamond coatings before and after the impact, respectively. The results showed that MCD/NCD coating had the smallest impact scar. Furthermore, it could be concluded that the multilayer strategy was beneficial for coating to improve the impact resistance.