Orientation and growth of grains in copper-activated hot-pressed hexagonal boron nitride

Journal Article · Sun Dec 31 23:00:00 EST 1995 · Journal of the American Ceramic Society

DOI:https://doi.org/10.1111/j.1151-2916.1996.tb07911.x· OSTI ID:203559

Hubacek, M; Ueki, Masanori ^[1]; Sato, Tadao ^[2]

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1. Nippon Steel Corp., Kawasaki (Japan). Advanced Technology Research Labs.
2. National Inst. for Research in Inorganic Materials, Tsukuba, Ibaraki (Japan)

Hexagonal boron nitride powder was hot pressed in an environment of metallic copper. When compared with a copper-free system, the sintered body exposed to the copper was composed of substantially thicker grains having an unusual arrangement, consisting of preferred alignment of (0001) basal planes parallel to the pressure axis. The character of the orientation of the boron nitride grains substantially influenced the mechanical strength of the ceramics. The difference in the orientation of the grains is explained by the interaction between copper atoms and boron nitride crystals selectively occurring on the (0001) basal planes of the latter.

• Sponsoring Organization: USDOE
• OSTI ID: 203559
• Journal Information: Journal of the American Ceramic Society, Journal Name: Journal of the American Ceramic Society Journal Issue: 1 Vol. 79; ISSN 0002-7820; ISSN JACTAW
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ANISOTROPY
BORON NITRIDES
COPPER ADDITIONS
FLEXURAL STRENGTH
GRAIN GROWTH
GRAIN ORIENTATION
HOT PRESSING
MICROSTRUCTURE
PARTICLE SIZE
POWDERS
SCANNING ELECTRON MICROSCOPY
X-RAY DIFFRACTION