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Author Sumiyoshi, T. ♦ Tomita, H. ♦ Takahashi, A. ♦ Obara, M. ♦ Ishii, K.
Source United States Department of Energy Office of Scientific and Technical Information
Content type Text
Language English
Subject Keyword PLASMA PHYSICS AND FUSION ♦ LASER TARGETS ♦ ABLATION ♦ BORON NITRIDES ♦ CARBON DIOXIDE LASERS ♦ PULSES ♦ ENERGY ABSORPTION ♦ FREQUENCY DEPENDENCE
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.}
ISSN 0094243X
Educational Use Research
Learning Resource Type Article
Publisher Date 1996-05-01
Publisher Place United States
Volume Number 369
Issue Number 1
Technical Publication No. CONF-950476-


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