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2015 Fiscal Year Final Research Report

Texture and strain analyses of polycrystalline materials using two-dimensional X-ray diffraction patterns under high-pressure experiments

Research Project

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Project/Area Number 25287143
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypePartial Multi-year Fund
Section一般
Research Field Petrology/Mineralogy/Economic geology
Research InstitutionKobe University

Principal Investigator

SETO YUSUKE  神戸大学, 理学(系)研究科(研究院), 講師 (10399818)

Co-Investigator(Renkei-kenkyūsha) MIYAKE AKIRA  京都大学, 大学院理学研究科, 准教授 (10324609)
HAMANE DAISUKE  東京大学, 物性研究所, 技術職員 (20579073)
Project Period (FY) 2013-04-01 – 2016-03-31
Keywords格子選択配向 / X線回折 / 高温高圧実験 / 地球深部物質
Outline of Final Research Achievements

Angle dispersive X-ray diffraction experiments using area detectors provide wide opportunity for the determination of lattice preferred crystallite orientation (LPO) and lattice strain under stress condition in polycrystalline materials. LPO is reflected in circumferential oscillations along Debye rings, while the effect of lattice strain appears in elliptic distortions of the each ring and a deviation of the original crystallographic geometry among rings. These are substantial factors of bulk physical properties in polycrystalline materials, including seismic velocity, thermal/electric conductivity and so on. In the present study, software code was developed, in which a two-dimensional diffraction pattern is simulated based on given experimental parameters and (poly)crystalline properties. The method in the present study is potentially an applicable technique to analyze LPO and stress field of polycrystalline material under extreme conditions including deforming experiments.

Free Research Field

鉱物学

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Published: 2017-05-10  

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