In situ X-ray powder diffraction study on stability of icosahedral Al–Pd–Mn high quality single quasi-crystal under high pressure up to 70 GPa
1999; Elsevier BV; Volume: 250-252; Linguagem: Inglês
10.1016/s0022-3093(99)00191-x
ISSN1873-4812
AutoresMasashi Hasegawa, A. P. Tsai, Tadashi Kondo, T. Yagi, Takumi Kikegawa,
Tópico(s)X-ray Diffraction in Crystallography
ResumoStability of icosahedral Al72Pd18.5Mn9.5 single quasi-crystals has been investigated under pressure up to 70 GPa by means of an in situ angular-dispersive X-ray powder diffraction method using synchrotron radiation and diamond anvil cell. It is found that the quasi-crystal structure of icosahedral Al72Pd18.5Mn9.5 is stable under pressures ⩽70 GPa. The zero-pressure bulk modulus and its pressure derivative are estimated to be 100 ± 12 GPa and 5.3 ± 0.9, respectively, using the Birch–Murnaghan equation of state. The residual strain in the quasi-crystal sample recovered from 70 GPa is estimated to be about 0.53%.
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