TY - JOUR
T1 - Effects of high pressure on stability of the nanocrystalline LiAlSi 2O6 phase of a glass-ceramic composite
T2 - A synchrotron X-ray diffraction study
AU - Lipinska-Kalita, Kristina E.
AU - Mariotto, Gino
AU - Kalita, Patricia E.
AU - Ohki, Yoshimichi
N1 - Funding Information:
The authors gratefully acknowledge the support from the U.S. Department of Energy Cooperative Agreement No. FC08-01NV14049 with the University of Nevada Las Vegas. We also thank the HPCAT staff at the APS for assistance in the measurements, especially Dr. Haozhe Liu for help with the X-ray diffraction experiments. HPCAT is a collaboration among the Carnegie Institution of Washington, Lawrence Livermore National Laboratory, the University of Hawaii, the University of Nevada Las Vegas, and the Carnegie/DOE Alliance Center. Use of the Advanced Photon Source is supported by the U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences, under Contract No. W-31-109-Eng-38. Part of this work was done under financial support of the Advanced Research Institute for Science and Engineering, Waseda University, Tokyo (Japan). The authors acknowledge the Nippon Electric Glass Company, Kyoto (Japan) for technical advice and the use of their facilities for samples preparation.
PY - 2005/8/1
Y1 - 2005/8/1
N2 - Synchrotron X-ray diffraction studies, under pressures up to 50 GPa, have been performed on a lithium-aluminosilicate glass-ceramic composite with nanometer-sized LiAlSi2O6 crystals embedded in a host matrix. The pressure-induced evolution of X-ray diffraction patterns was followed in a diamond anvil cell on compression and decompression cycles with the aim of probing the effect of high-pressure compression on the nanocomposite structure. On the compression cycle from ambient pressure up to 20 GPa the unit cell volume of the LiAlSi2O6 phase decreased by about 22%. The diffraction patterns also revealed the presence, at high pressures, of the ZrTiO4 phase that was nucleated in the matrix prior to the crystallization of the main LiAlSi2O6 phase. After quenching from 50 GPa to close to ambient conditions the diffraction pattern indicated that the high-pressure phase was retained to some extent although the decompressed structure still carried the signature of the initial ambient LiAlSi2O6 phase. A Birch-Murnaghan fit of the unit cell volume as a function of pressure yielded a zero pressure bulk modulus K0=71±2GPa and its pressure derivative K0′=4.4±0.6GPa for the nanocrystalline phase.
AB - Synchrotron X-ray diffraction studies, under pressures up to 50 GPa, have been performed on a lithium-aluminosilicate glass-ceramic composite with nanometer-sized LiAlSi2O6 crystals embedded in a host matrix. The pressure-induced evolution of X-ray diffraction patterns was followed in a diamond anvil cell on compression and decompression cycles with the aim of probing the effect of high-pressure compression on the nanocomposite structure. On the compression cycle from ambient pressure up to 20 GPa the unit cell volume of the LiAlSi2O6 phase decreased by about 22%. The diffraction patterns also revealed the presence, at high pressures, of the ZrTiO4 phase that was nucleated in the matrix prior to the crystallization of the main LiAlSi2O6 phase. After quenching from 50 GPa to close to ambient conditions the diffraction pattern indicated that the high-pressure phase was retained to some extent although the decompressed structure still carried the signature of the initial ambient LiAlSi2O6 phase. A Birch-Murnaghan fit of the unit cell volume as a function of pressure yielded a zero pressure bulk modulus K0=71±2GPa and its pressure derivative K0′=4.4±0.6GPa for the nanocrystalline phase.
KW - Composites
KW - Glass-ceramics
KW - High-pressure
KW - Nanocrystals
KW - Synchrotron X-ray diffraction
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U2 - 10.1016/j.physb.2005.05.010
DO - 10.1016/j.physb.2005.05.010
M3 - Article
AN - SCOPUS:22344438588
VL - 365
SP - 155
EP - 162
JO - Physica B: Condensed Matter
JF - Physica B: Condensed Matter
SN - 0921-4526
IS - 1-4
ER -