Inclined-mirror Hugoniot measurements were performed on pure AlN polycrystals in the pressure range up to 150 GPa to study the yield properties, phase transition, and equation of state. The Hugoniot-elastic limit (HEL) stress was approximately 9.4 GPa. Above the HEL, the Hugoniot data converged to a static compression curve despite the high thermal conductivity, which indicated that the thermal property is not an important factor in determining the shock yield property. The phase transformation from wurtzite-type (B4) to rock salt-type (B1) structure took place at approximately 19.4 GPa, and was completed by about 75 GPa. The corrected transition pressure at 298 K was 19.2 GPa. Shock velocity versus particle velocity relation of the final phase was given by The Birch–Murnaghan fitting curve of the calculated isothermal compression curve of the B1-type phase roughly coincided with the recent static x-ray diffraction data up to over 100 GPa. The Grüneisen parameter, bulk moduli and the pressure derivative at zero pressure of the B1-type phase were estimated to be 1.51±0.03, 304±4 GPa, and 3.9±0.2 respectively.
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15 December 1999
Research Article|
December 15 1999
Yield properties, phase transition, and equation of state of aluminum nitride (AlN) under shock compression up to 150 GPa
Tsutomu Mashimo;
Tsutomu Mashimo
Shock Wave and Condensed Matter Research Center, Kumamoto University, Kumamoto 860-8555, Japan
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Masakazu Uchino;
Masakazu Uchino
Shock Wave and Condensed Matter Research Center, Kumamoto University, Kumamoto 860-8555, Japan
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Akira Nakamura;
Akira Nakamura
Shock Wave and Condensed Matter Research Center, Kumamoto University, Kumamoto 860-8555, Japan
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Takamichi Kobayashi;
Takamichi Kobayashi
National Institute for Research in Inorganic Materials, Tsukuba, Ibaraki 305-0044, Japan
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Eiichi Takasawa;
Eiichi Takasawa
National Institute for Research in Inorganic Materials, Tsukuba, Ibaraki 305-0044, Japan
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Toshimori Sekine;
Toshimori Sekine
National Institute for Research in Inorganic Materials, Tsukuba, Ibaraki 305-0044, Japan
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Yuichi Noguchi;
Yuichi Noguchi
Institute for Materials Science, Tohoku University, Katahira 2-1-1, Sendai 980-8577, Japan
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Hideaki Hikosaka;
Hideaki Hikosaka
Institute for Materials Science, Tohoku University, Katahira 2-1-1, Sendai 980-8577, Japan
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Kiyoto Fukuoka;
Kiyoto Fukuoka
Institute for Materials Science, Tohoku University, Katahira 2-1-1, Sendai 980-8577, Japan
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Yasuhiko Syono
Yasuhiko Syono
Institute for Materials Science, Tohoku University, Katahira 2-1-1, Sendai 980-8577, Japan
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J. Appl. Phys. 86, 6710–6716 (1999)
Article history
Received:
June 15 1999
Accepted:
September 08 1999
Citation
Tsutomu Mashimo, Masakazu Uchino, Akira Nakamura, Takamichi Kobayashi, Eiichi Takasawa, Toshimori Sekine, Yuichi Noguchi, Hideaki Hikosaka, Kiyoto Fukuoka, Yasuhiko Syono; Yield properties, phase transition, and equation of state of aluminum nitride (AlN) under shock compression up to 150 GPa. J. Appl. Phys. 15 December 1999; 86 (12): 6710–6716. https://doi.org/10.1063/1.371749
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