Hydrothermal-Reaction-Assisted Laser Machining of Cubic Boron Nitride

Although the high hardness and chemical stability of cubic boron nitride (cBN) complicate its machining, the mass decrease of cBN in a steam environment at high temperature has been reported. In this study, we investigated hydrothermal‐reaction‐assisted laser drilling of cBN in various environments....

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Bibliographic Details
Published in:Journal of the American Ceramic Society 2006-05, Vol.89 (5), p.1621-1623
Main Authors: Hidai, Hirofumi, Tokura, Hitoshi
Format: Article
Language:English
Subjects:
Applied sciences
Boric acids
Building materials. Ceramics. Glasses
Ceramic industries
Ceramics
Chemical industry and chemicals
Chemical reactions
Cubic boron nitride
Exact sciences and technology
Laser machining
Laser sintering
Lasers
Machining
Miscellaneous
Single crystals
Sintering
Technical ceramics
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Summary:Although the high hardness and chemical stability of cubic boron nitride (cBN) complicate its machining, the mass decrease of cBN in a steam environment at high temperature has been reported. In this study, we investigated hydrothermal‐reaction‐assisted laser drilling of cBN in various environments. A single‐crystalline cBN grain, binder‐containing sintered cBN, and binderless sintered cBN were irradiated with an Ar ion laser in water and steam, and in gas atmospheres. The cBN reacted with water, and NH4+ or NH4+‐N and boric acid were produced. Hydrothermal‐reaction‐assisted machining was not effective for binder‐containing sintered cBN, but was effective for single‐crystalline cBN and binderless sintered cBN.
ISSN:0002-7820
1551-2916
DOI:10.1111/j.1551-2916.2006.00916.x