TY - JOUR
T1 - Formation of microcracks in cubic boron nitride
AU - Aki, M.
AU - Ohno, Y.
AU - Kohno, H.
AU - Takeda, S.
N1 - Funding Information:
ACKNwO L EDGEM ENTS The authors are indebted to Professor Y. Hirotsu and Dr T. Ohkubo of the Institute of Scientific and Industrial Research of Osaka University for help with the EELS measurements. This work was supported in part by a Grant-in Aid for Science Research from the Ministry of Education, Science, Sports and Culture, Japan.
PY - 2000/3
Y1 - 2000/3
N2 - We have found that microcracks are formed in a cubic boron nitride crystal, grown by a hot-press method, by annealing at temperatures above 673 K. Analyses of the data obtained by transmission electron microscopy and diffraction have shown that these microcracks do not extend on the most easily cleaved {110}-type planes but do extend on {lll}-type planes. The electron- energy-loss spectroscopy data have indicated that the microcracks are formed by the condensation of excess nitrogen atoms into the {111}-type planes. We have shown that a microcrack originates from the segment of a 60° dislocation, and it extends to the dilation side of the dislocation; that is the habit plane of the microcrack is not the glide plane of the dislocation.
AB - We have found that microcracks are formed in a cubic boron nitride crystal, grown by a hot-press method, by annealing at temperatures above 673 K. Analyses of the data obtained by transmission electron microscopy and diffraction have shown that these microcracks do not extend on the most easily cleaved {110}-type planes but do extend on {lll}-type planes. The electron- energy-loss spectroscopy data have indicated that the microcracks are formed by the condensation of excess nitrogen atoms into the {111}-type planes. We have shown that a microcrack originates from the segment of a 60° dislocation, and it extends to the dilation side of the dislocation; that is the habit plane of the microcrack is not the glide plane of the dislocation.
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U2 - 10.1080/01418610008212079
DO - 10.1080/01418610008212079
M3 - Article
AN - SCOPUS:0034160985
SN - 0141-8610
VL - 80
SP - 747
EP - 758
JO - Philosophical Magazine A: Physics of Condensed Matter, Structure, Defects and Mechanical Properties
JF - Philosophical Magazine A: Physics of Condensed Matter, Structure, Defects and Mechanical Properties
IS - 3
ER -