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Hydrothermal‐Reaction‐Assisted Laser Machining of Cubic Boron Nitride
Author(s) -
Hidai Hirofumi,
Tokura Hitoshi
Publication year - 2006
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1551-2916.2006.00916.x
Subject(s) - boron nitride , materials science , hydrothermal circulation , boric acid , machining , metallurgy , boron , chemical engineering , composite material , chemistry , organic chemistry , engineering
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 NH 4 + or NH 4 + ‐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.