Basic study on ultraprecision machining of single-crystal calcium fluoride

Research output: Chapter in Book/Report/Conference proceedingConference contribution

15 Citations (Scopus)

Abstract

Calcium fluoride (CaF 2) has a wide range of change of refractive index and permeability of wavelength from vacuum ultraviolet range to infrared range so that it is utilized for lenses or prisms. CaF 2 has been fabricated using conventionally grinding and polishing combined with interferometry and local surface correction to form the desired flat, sphere or aspherical surface. In this study, the mechanical properties and crack initiation on the (100), (110) and (111) planes of CaF 2 are examined by nanoindentation and micro-Vickers hardness tests. In addition, brittle-ductile transition is investigated by performing an orthogonal cutting test with ultraprecision machine tool. The results of these tests show that the critical depth of cut remarkably changes on the basis of the crystal orientation on each plane. We have discussed these changes from the viewpoint of slip system and cleavage.

Original languageEnglish
Title of host publicationProcedia Engineering
Pages264-269
Number of pages6
Volume19
DOIs
Publication statusPublished - 2011
Event1st CIRP Conference on Surface Integrity, CSI 2012 - Bremen, Germany
Duration: 2012 Jan 302012 Feb 1

Other

Other1st CIRP Conference on Surface Integrity, CSI 2012
CountryGermany
CityBremen
Period12/1/3012/2/1

Fingerprint

Calcium fluoride
Machining
Single crystals
Vickers hardness
Nanoindentation
Prisms
Polishing
Crack initiation
Machine tools
Interferometry
Crystal orientation
Lenses
Refractive index
Vacuum
Infrared radiation
Wavelength
Mechanical properties

Keywords

  • Nanoindentation
  • Single-crystal CaF
  • Ultra-precision machining

ASJC Scopus subject areas

  • Engineering(all)

Cite this

Basic study on ultraprecision machining of single-crystal calcium fluoride. / Mizumoto, Y.; Aoyama, Tojiro; Kakinuma, Yasuhiro.

Procedia Engineering. Vol. 19 2011. p. 264-269.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Mizumoto, Y, Aoyama, T & Kakinuma, Y 2011, Basic study on ultraprecision machining of single-crystal calcium fluoride. in Procedia Engineering. vol. 19, pp. 264-269, 1st CIRP Conference on Surface Integrity, CSI 2012, Bremen, Germany, 12/1/30. https://doi.org/10.1016/j.proeng.2011.11.110
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