Measurement of Thermal Expansion Coefficient of MgZnY Alloys with Synchronized Long-Period Stacking Ordered Phase

Shigeru Kimura; Nobuhiro Yasuda

doi:10.4028/www.scientific.net/MSF.941.1123

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HomeMaterials Science ForumMaterials Science Forum Vol. 941Measurement of Thermal Expansion Coefficient of...

Measurement of Thermal Expansion Coefficient of MgZnY Alloys with Synchronized Long-Period Stacking Ordered Phase

Abstract:

We measured the thermal expansion coefficients of 18R-LPSO phase and α-Mg phase in a Mg₉₇Zn₁Y₂ alloy polycrystal. This was achieved by using a Gandolfi camera, which was attached on a high precision diffractometer at SPring-8 BL40XU beamline. By using this system, fine diffraction data were obtained from a Mg₉₇Zn₁Y₂ polycrystal at 6 different temperatures between 90 and 450 K. We succeeded to determine cell parameters of 18R-LPSO phase and α-Mg phase separately in the Mg₉₇Zn₁Y₂ alloy polycrystal. The thermal expansion coefficients were determined from the refined cell parameters. The differences of the thermal expansion coefficients of 18R-LPSO phase and α-Mg phase in the Mg₉₇Zn₁Y₂ alloy were much smaller than those of single-phase 18R-LPSO and α-Mg polycrystals.

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Periodical:

Materials Science Forum (Volume 941)

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1123-1126

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https://doi.org/10.4028/www.scientific.net/MSF.941.1123

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Online since:

December 2018

Authors:

Shigeru Kimura*, Nobuhiro Yasuda

Keywords:

LPSO, Magnesium Alloy, Synchrotron Radiation, Thermal Expansion Coefficient, X-Ray Diffraction

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