Yu-ping MA, Yao ZHANG, Chao WEI, et al. Surface polishing of CVD diamond coating by femtosecond laser[J]. Optics and precision engineering, 2019, 27(1): 164-171.
DOI:
Yu-ping MA, Yao ZHANG, Chao WEI, et al. Surface polishing of CVD diamond coating by femtosecond laser[J]. Optics and precision engineering, 2019, 27(1): 164-171. DOI: 10.3788/OPE.20192701.0164.
Surface polishing of CVD diamond coating by femtosecond laser
and scanning speed on diamond roughness were examined for the purpose of diamond coating surface Ra improvements. The morphology and roughness of fs-laser polished regions were analyzed with white-light interferometry. The experimental results showed that the diamond coating roughness decreased if the laser power decreased
and when the laser power was less than 100 mW
the roughness increased slightly with the reduced power. The laser repetitive frequency did not exhibit deteriorative effects on the roughness. The roughness decreased with decreasing scanning speed; however
a slight increase in the surface roughness was observed when the scanning velocity increased to 1.6 mm/s. Finally
under the conditions of 100 mW laser power
1 KHz repetition rate
and 1.6 mm/s scanning speed
a minimum surface roughness of approximately 0.14 μm was obtained
reaching as low as 100 nm in certain local areas. Furthermore
the polished region had a higher compactness compared to the unpolished areas
and it met the requirements for low friction diamond coatings.
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references
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