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Author Drory, M. D. ♦ Ager, J. W. III ♦ Suski, T. ♦ Grzegory, I. ♦ Porowski, S.
Source United States Department of Energy Office of Scientific and Technical Information
Content type Text
Language English
Subject Keyword MATERIALS SCIENCE ♦ GALLIUM NITRIDES ♦ HARDNESS ♦ FRACTURE PROPERTIES ♦ MONOCRYSTALS ♦ LASER MATERIALS ♦ VERY HIGH PRESSURE ♦ DEFORMATION ♦ INDENTATION
Abstract Basic mechanical properties of single crystal gallium nitride are measured. A Vickers (diamond) indentation method was used to determine the hardness and fracture toughness under an applied load of 2N. The average hardness was measured as 12{plus_minus}2 GPa and the average fracture toughness was measured as 0.79{plus_minus}0.10 MPa{radical}m. These values are consistent with the properties of brittle ceramic materials and about twice the values for GaAs. A methodology for examining fracture problems in GaN is discussed. {copyright} {ital 1996 American Institute of Physics.}
ISSN 00036951
Educational Use Research
Learning Resource Type Article
Publisher Date 1996-12-01
Publisher Department Lawrence Berkeley National Laboratory
Publisher Place United States
Journal Applied Physics Letters
Volume Number 69
Issue Number 26
Organization Lawrence Berkeley National Laboratory


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