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Scratch with double-tip tool: Crack behavior during simultaneous double scratch on BK7 glass

Journal Article


Abstract


  • Over the past decade, successive double-scratch tests have been extensively performed to study the grinding mechanism of brittle materials. However, the grits sometimes interact with the surface simultaneously. In this study, double tips with a tip separation of 0.6–1.8 μm are fabricated by focused ion beam. Subsequently, double-scratch tests on BK7 optical glass are conducted using the double-tip scratch tool with a scratch depth of 200–600 nm. The typical crack system and its evolution mechanism for double-tip scratch are discovered, before being explained using an analytical stress model. The ductile–brittle transition and the material-removal mechanism are discussed. An influential radius for the interference between cracks and the stress field in the double scratch is obtained, which can serve as a reference for the design of textured grinding wheels. Subsequently, the advantages and disadvantages of double-tip scratches are discussed considering different applications, such as microstructure fabrication and grinding.

Publication Date


  • 2020

Citation


  • Feng, J., Wan, Z., Wang, W., Huang, X., Ding, X., & Jiang, Z. (2020). Scratch with double-tip tool: Crack behavior during simultaneous double scratch on BK7 glass. Journal of the European Ceramic Society, 40(12), 4202-4216. doi:10.1016/j.jeurceramsoc.2020.04.008

Scopus Eid


  • 2-s2.0-85083662385

Start Page


  • 4202

End Page


  • 4216

Volume


  • 40

Issue


  • 12

Abstract


  • Over the past decade, successive double-scratch tests have been extensively performed to study the grinding mechanism of brittle materials. However, the grits sometimes interact with the surface simultaneously. In this study, double tips with a tip separation of 0.6–1.8 μm are fabricated by focused ion beam. Subsequently, double-scratch tests on BK7 optical glass are conducted using the double-tip scratch tool with a scratch depth of 200–600 nm. The typical crack system and its evolution mechanism for double-tip scratch are discovered, before being explained using an analytical stress model. The ductile–brittle transition and the material-removal mechanism are discussed. An influential radius for the interference between cracks and the stress field in the double scratch is obtained, which can serve as a reference for the design of textured grinding wheels. Subsequently, the advantages and disadvantages of double-tip scratches are discussed considering different applications, such as microstructure fabrication and grinding.

Publication Date


  • 2020

Citation


  • Feng, J., Wan, Z., Wang, W., Huang, X., Ding, X., & Jiang, Z. (2020). Scratch with double-tip tool: Crack behavior during simultaneous double scratch on BK7 glass. Journal of the European Ceramic Society, 40(12), 4202-4216. doi:10.1016/j.jeurceramsoc.2020.04.008

Scopus Eid


  • 2-s2.0-85083662385

Start Page


  • 4202

End Page


  • 4216

Volume


  • 40

Issue


  • 12