Abstract
Accompanying with the extensive applications of micro-structured surfaces on hard and brittle material in MEMS and NEMS sensors, optical elements, electronic devices and medical products, efficiently fabricating of these surface has gradually become the focus of manufacturing community. Basing on precision grinding with conditioned and laser micro-structured coarse-grained diamond grinding wheel, a novel high efficiency technique for micro-structured surfaces on hard and brittle material, such as silicon carbide, was developed in this paper. Firstly, the maximum undeformed chip thickness for conditioned coarse-grained wheel and the ductile grinding of silicon carbide was theoretically and experimentally studied. Silicon carbide surface formed mainly in ductile regime was successfully achieved. And then, the strategy for micro-structuring the conditioned wheel with designed micro-structure geometry, sharp edge and small inclination angle side-wall was investigated. Finally, the linear and square micro-structured surfaces with high form accuracy and ultra-precision surface roughness were successfully and efficiently fabricated on silicon carbide by the technique developed in this paper.
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Abbreviations
- a p :
-
Grinding depth
- v s :
-
Grinding speed
- v w :
-
Feed rate
- N s :
-
Grinding wheel rotation
- C :
-
Abrasive grain density
- b :
-
Grinding wheel width
- V c :
-
Average material volume per chip
- d :
-
Grinding wheel diameter
- d s :
-
Equivalent wheel diameter
- l c :
-
Cutting chip length
- h m :
-
Maximum undeformed chip thickness
- E :
-
Elastic modulus
- H :
-
Vikers hardness
- K IC :
-
Fracture toughness
- d c :
-
Critical ductile–brittle transition depth
- δ 1 :
-
Overlap ratio of two adjacent lines
- Δ 1 :
-
Laser pulse pitch between two consecutive pulses
- Δ 2 :
-
Laser ablation line pitch
- ω 0 :
-
Laser focus radius
- z:
-
Defocusing quantity
- ω z :
-
Laser spot radius at defocusing quantity z
- ω s :
-
Laser spot radius
- Z R :
-
Rayleigh length
- f L :
-
Laser pulse repetition
- θ :
-
Inclination angle of the abrasive grain side edge
- θ 1 :
-
Estimation of micro-structure side-wall inclination angle
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Acknowledgements
This research work is supported by National Natural Science Foundation of China (No. 51405108), National Natural Science Foundation of Heilongjiang Province (No. E2018037) and postdoctoral scientific research developmental fund of Heilongjiang Province (No. LBH-Q17058).
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Wu, M., Guo, B., Zhao, Q. et al. High Efficiency Precision Grinding of Micro-structured SiC Surface Using Laser Micro-structured Coarse-Grain Diamond Grinding Wheel. Int. J. of Precis. Eng. and Manuf.-Green Tech. 6, 577–586 (2019). https://doi.org/10.1007/s40684-019-00058-9
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DOI: https://doi.org/10.1007/s40684-019-00058-9