Synthesis of new hydrides in Mg-Y systems by using high pressure

Yasuyuki Goto; Atsunori Kamegawa; Hitoshi Takamura; Masuo Okada

doi:10.2320/matertrans.43.2717

Synthesis of new hydrides in Mg-Y systems by using high pressure

Yasuyuki Goto, Atsunori Kamegawa, Hitoshi Takamura, Masuo Okada

ENG - Materials Science

Tohoku University

Research output: Contribution to journal › Article › peer-review

24 Citations (Scopus)

Abstract

A new hydride in the MgH₂-YH₃ system was found by using a high pressure of 5 GPa, and their crystal structure, thermal stability and hydrogen content were studied. The high-pressure synthesis was carried out at 1073 K for 2h under 5 GPa by using an anvil-type apparatus. In the MgH₂-xat%YH₃ system (x = 33-100), novel hydride was synthesized near x = 67 (MgY₂H_y). This phase exhibited a FCC-type structure with a cell parameter of a = 0.516 nm. This high-pressure phase was dehydrogenated at about 600 K under an Ar atmosphere of 0.05 MPa, and the FCC structure was maintained after dehydrogenation. The amount of hydrogen desorbed at about 600 K was 1.4 mass%.

Original language	English
Pages (from-to)	2717-2720
Number of pages	4
Journal	Materials Transactions
Volume	43
Issue number	11
DOIs	https://doi.org/10.2320/matertrans.43.2717
Publication status	Published - 2002 Nov

Keywords

High pressure
Hydride
Magnesium-Yttrium

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10.2320/matertrans.43.2717

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title = "Synthesis of new hydrides in Mg-Y systems by using high pressure",

abstract = "A new hydride in the MgH2-YH3 system was found by using a high pressure of 5 GPa, and their crystal structure, thermal stability and hydrogen content were studied. The high-pressure synthesis was carried out at 1073 K for 2h under 5 GPa by using an anvil-type apparatus. In the MgH2-xat%YH3 system (x = 33-100), novel hydride was synthesized near x = 67 (MgY2Hy). This phase exhibited a FCC-type structure with a cell parameter of a = 0.516 nm. This high-pressure phase was dehydrogenated at about 600 K under an Ar atmosphere of 0.05 MPa, and the FCC structure was maintained after dehydrogenation. The amount of hydrogen desorbed at about 600 K was 1.4 mass%.",

keywords = "High pressure, Hydride, Magnesium-Yttrium",

author = "Yasuyuki Goto and Atsunori Kamegawa and Hitoshi Takamura and Masuo Okada",

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T1 - Synthesis of new hydrides in Mg-Y systems by using high pressure

AU - Goto, Yasuyuki

AU - Kamegawa, Atsunori

AU - Takamura, Hitoshi

AU - Okada, Masuo

PY - 2002/11

Y1 - 2002/11

N2 - A new hydride in the MgH2-YH3 system was found by using a high pressure of 5 GPa, and their crystal structure, thermal stability and hydrogen content were studied. The high-pressure synthesis was carried out at 1073 K for 2h under 5 GPa by using an anvil-type apparatus. In the MgH2-xat%YH3 system (x = 33-100), novel hydride was synthesized near x = 67 (MgY2Hy). This phase exhibited a FCC-type structure with a cell parameter of a = 0.516 nm. This high-pressure phase was dehydrogenated at about 600 K under an Ar atmosphere of 0.05 MPa, and the FCC structure was maintained after dehydrogenation. The amount of hydrogen desorbed at about 600 K was 1.4 mass%.

AB - A new hydride in the MgH2-YH3 system was found by using a high pressure of 5 GPa, and their crystal structure, thermal stability and hydrogen content were studied. The high-pressure synthesis was carried out at 1073 K for 2h under 5 GPa by using an anvil-type apparatus. In the MgH2-xat%YH3 system (x = 33-100), novel hydride was synthesized near x = 67 (MgY2Hy). This phase exhibited a FCC-type structure with a cell parameter of a = 0.516 nm. This high-pressure phase was dehydrogenated at about 600 K under an Ar atmosphere of 0.05 MPa, and the FCC structure was maintained after dehydrogenation. The amount of hydrogen desorbed at about 600 K was 1.4 mass%.

KW - High pressure

KW - Hydride

KW - Magnesium-Yttrium

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Synthesis of new hydrides in Mg-Y systems by using high pressure

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Keywords

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