skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Wavelength dependence of boron nitride ablation by TEA CO{sub 2} lasers

Abstract

Transversely excited atmospheric (TEA) CO{sub 2} laser ablation of boron nitride ceramics in both cubic and hexagonal phases (cBN, hBN) was demonstrated. A TEA CO{sub 2} laser oscillating at a wavelength of 9.2 {mu}m, which coincides with a TO-phonon spectrum of the cBN, could ablate the cBN ceramics more efficiently than with 10 {mu}m band radiation. The hBN samples were also ablated well with 9.2 {mu}m laser irradiation, however, the ablated site color changed to black due to a boron rich phase left on the surface. In the case of hBN sintered with Al{sub 2}O{sub 3} and SiO{sub 2}, the ablation threshold fluence is determined by the one of Al{sub 2}O{sub 3}, which is the highest threshold among the three elements. {copyright} {ital 1996 American Institute of Physics.}

Authors:
; ; ;  [1];  [2]
  1. Department of Electrical Engineering, Faculty of Science and Technology, Keio University 3-14-1 Hiyoshi, Kohoku-ku, Yokohama, 223 (Japan)
  2. Enrichment Technology Development Section Nuclear Fuel Development Division, Tokai Works, Power Reactor and Nuclear Fuel Development Corporation, Muramatsu, Tokaimura, Nakagun, Ibaraki, 319-11 (Japan)
Publication Date:
OSTI Identifier:
397372
Report Number(s):
CONF-950476-
Journal ID: APCPCS; ISSN 0094-243X; TRN: 96:029439
Resource Type:
Journal Article
Journal Name:
AIP Conference Proceedings
Additional Journal Information:
Journal Volume: 369; Journal Issue: 1; Conference: 12. international conference on laser interaction and related plasma phenomena, Osaka (Japan), 24-28 Apr 1995; Other Information: PBD: May 1996
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION; LASER TARGETS; ABLATION; BORON NITRIDES; CARBON DIOXIDE LASERS; PULSES; ENERGY ABSORPTION; FREQUENCY DEPENDENCE

Citation Formats

Sumiyoshi, T, Tomita, H, Takahashi, A, Obara, M, and Ishii, K. Wavelength dependence of boron nitride ablation by TEA CO{sub 2} lasers. United States: N. p., 1996. Web. doi:10.1063/1.50420.
Sumiyoshi, T, Tomita, H, Takahashi, A, Obara, M, & Ishii, K. Wavelength dependence of boron nitride ablation by TEA CO{sub 2} lasers. United States. doi:10.1063/1.50420.
Sumiyoshi, T, Tomita, H, Takahashi, A, Obara, M, and Ishii, K. Wed . "Wavelength dependence of boron nitride ablation by TEA CO{sub 2} lasers". United States. doi:10.1063/1.50420.
@article{osti_397372,
title = {Wavelength dependence of boron nitride ablation by TEA CO{sub 2} lasers},
author = {Sumiyoshi, T and Tomita, H and Takahashi, A and Obara, M and Ishii, K},
abstractNote = {Transversely excited atmospheric (TEA) CO{sub 2} laser ablation of boron nitride ceramics in both cubic and hexagonal phases (cBN, hBN) was demonstrated. A TEA CO{sub 2} laser oscillating at a wavelength of 9.2 {mu}m, which coincides with a TO-phonon spectrum of the cBN, could ablate the cBN ceramics more efficiently than with 10 {mu}m band radiation. The hBN samples were also ablated well with 9.2 {mu}m laser irradiation, however, the ablated site color changed to black due to a boron rich phase left on the surface. In the case of hBN sintered with Al{sub 2}O{sub 3} and SiO{sub 2}, the ablation threshold fluence is determined by the one of Al{sub 2}O{sub 3}, which is the highest threshold among the three elements. {copyright} {ital 1996 American Institute of Physics.}},
doi = {10.1063/1.50420},
journal = {AIP Conference Proceedings},
number = 1,
volume = 369,
place = {United States},
year = {1996},
month = {5}
}