Wavelength dependence of boron nitride ablation by TEA CO{sub 2} lasers
- Department of Electrical Engineering, Faculty of Science and Technology, Keio University 3-14-1 Hiyoshi, Kohoku-ku, Yokohama, 223 (Japan)
- Enrichment Technology Development Section Nuclear Fuel Development Division, Tokai Works, Power Reactor and Nuclear Fuel Development Corporation, Muramatsu, Tokaimura, Nakagun, Ibaraki, 319-11 (Japan)
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.}
- OSTI ID:
- 397372
- Report Number(s):
- CONF-950476-; ISSN 0094-243X; TRN: 96:029439
- Journal Information:
- AIP Conference Proceedings, Vol. 369, 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
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