On the improvement of subsurface quality of CaF2 single crystal machined by boron-doped nano-polycrystalline diamond tools

Yuta Mizumoto; Hikaru Amano; Hiroi Kangawa; Katsuko Harano; Hitoshi Sumiya; Yasuhiro Kakinuma

doi:10.1016/j.precisioneng.2017.11.005

On the improvement of subsurface quality of CaF₂ single crystal machined by boron-doped nano-polycrystalline diamond tools

Yuta Mizumoto, Hikaru Amano, Hiroi Kangawa, Katsuko Harano, Hitoshi Sumiya, Yasuhiro Kakinuma

Department of System Design Engineering

Research output: Contribution to journal › Article › peer-review

18 Citations (Scopus)

Abstract

The subsurface quality of single-crystal calcium fluoride (CaF₂) is examined by ultra-precision cutting experiments using a boron-doped nano-polycrystalline diamond (B-NPD) tool and compared with that of CaF₂ machined with a single-crystalline diamond tool (SCD). The critical depth of cut, surface morphologies, and process force did not change significantly in the plunge-cut tests. In the ultra-precision cylindrical turning tests, the surface roughness was almost the same, whereas the subsurface damage depth (SSD) changed remarkably, from ten to several hundred nanometers. The SSD depth was reduced by the use of B-NPD. Additionally, shear deformation and rotational deformation of the subsurface layer were observed. The lowering of friction coefficient at the interface between the cutting tool and the machined surface is assumed to affect the subsurface layer.

Original language	English
Pages (from-to)	73-83
Number of pages	11
Journal	Precision Engineering
Volume	52
DOIs	https://doi.org/10.1016/j.precisioneng.2017.11.005
Publication status	Published - 2018 Apr

Keywords

Boron-doped diamond
Cutting tool
Single-crystal CaF
Subsurface damage

ASJC Scopus subject areas

Engineering(all)

Access to Document

10.1016/j.precisioneng.2017.11.005

Cite this

@article{161c0d2f3ae14a61a62caf5b0a06cd9f,

title = "On the improvement of subsurface quality of CaF2 single crystal machined by boron-doped nano-polycrystalline diamond tools",

abstract = "The subsurface quality of single-crystal calcium fluoride (CaF2) is examined by ultra-precision cutting experiments using a boron-doped nano-polycrystalline diamond (B-NPD) tool and compared with that of CaF2 machined with a single-crystalline diamond tool (SCD). The critical depth of cut, surface morphologies, and process force did not change significantly in the plunge-cut tests. In the ultra-precision cylindrical turning tests, the surface roughness was almost the same, whereas the subsurface damage depth (SSD) changed remarkably, from ten to several hundred nanometers. The SSD depth was reduced by the use of B-NPD. Additionally, shear deformation and rotational deformation of the subsurface layer were observed. The lowering of friction coefficient at the interface between the cutting tool and the machined surface is assumed to affect the subsurface layer.",

keywords = "Boron-doped diamond, Cutting tool, Single-crystal CaF, Subsurface damage",

author = "Yuta Mizumoto and Hikaru Amano and Hiroi Kangawa and Katsuko Harano and Hitoshi Sumiya and Yasuhiro Kakinuma",

note = "Funding Information: This study was partially supported by JSPS KAKENHI Grant Number 16K14137 and JSPS Research Fellow Grant Number 16J03359 . The authors would like to express their sincere appreciation for the support. Publisher Copyright: {\textcopyright} 2017",

year = "2018",

month = apr,

doi = "10.1016/j.precisioneng.2017.11.005",

language = "English",

volume = "52",

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AU - Mizumoto, Yuta

AU - Amano, Hikaru

AU - Kangawa, Hiroi

AU - Harano, Katsuko

AU - Sumiya, Hitoshi

AU - Kakinuma, Yasuhiro

N1 - Funding Information: This study was partially supported by JSPS KAKENHI Grant Number 16K14137 and JSPS Research Fellow Grant Number 16J03359 . The authors would like to express their sincere appreciation for the support. Publisher Copyright: © 2017

PY - 2018/4

Y1 - 2018/4

N2 - The subsurface quality of single-crystal calcium fluoride (CaF2) is examined by ultra-precision cutting experiments using a boron-doped nano-polycrystalline diamond (B-NPD) tool and compared with that of CaF2 machined with a single-crystalline diamond tool (SCD). The critical depth of cut, surface morphologies, and process force did not change significantly in the plunge-cut tests. In the ultra-precision cylindrical turning tests, the surface roughness was almost the same, whereas the subsurface damage depth (SSD) changed remarkably, from ten to several hundred nanometers. The SSD depth was reduced by the use of B-NPD. Additionally, shear deformation and rotational deformation of the subsurface layer were observed. The lowering of friction coefficient at the interface between the cutting tool and the machined surface is assumed to affect the subsurface layer.

AB - The subsurface quality of single-crystal calcium fluoride (CaF2) is examined by ultra-precision cutting experiments using a boron-doped nano-polycrystalline diamond (B-NPD) tool and compared with that of CaF2 machined with a single-crystalline diamond tool (SCD). The critical depth of cut, surface morphologies, and process force did not change significantly in the plunge-cut tests. In the ultra-precision cylindrical turning tests, the surface roughness was almost the same, whereas the subsurface damage depth (SSD) changed remarkably, from ten to several hundred nanometers. The SSD depth was reduced by the use of B-NPD. Additionally, shear deformation and rotational deformation of the subsurface layer were observed. The lowering of friction coefficient at the interface between the cutting tool and the machined surface is assumed to affect the subsurface layer.

KW - Boron-doped diamond

KW - Cutting tool

KW - Single-crystal CaF

KW - Subsurface damage

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