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

被引：22

作者：

Goto, Y ^{[1
]}

Kamegawa, A ^{[1
]}

Takamura, H ^{[1
]}

Okada, M ^{[1
]}

机构：

[1] Tohoku Univ, Grad Sch Engn, Dept Mat Sci, Sendai, Miyagi 9808579, Japan

来源：

MATERIALS TRANSACTIONS | 2002年 / 43卷 / 11期

关键词：

high pressure; hydride; Magnesium-Yttrium;

D O I：

10.2320/matertrans.43.2717

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

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 2 h 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 At 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%.

引用

页码：2717 / 2720

页数：4