Low temperature de/hydrogenation in the partially crystallized Mg60Ce10Ni20Cu10 metallic glasses induced by milling with process control agents

被引：16

作者：

Huang, L. J. ^{[1
]}

Wang, H. ^{[1
]}

Liu, J. W. ^{[1
]}

Zhang, C. ^{[1
]}

Ouyang, L. Z. ^{[1
]}

Zhu, M. ^{[1
]}

机构：

[1] South China Univ Technol, Key Lab Adv Energy Storage Mat Guangdong Prov, Guangzhou 510641, Guangdong, Peoples R China

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2019年 / 792卷

基金：

中国国家自然科学基金;

关键词：

Hydrogen storage; Mg-based amorphous alloy; Ball milling; Nanocrystalline; Milling process control agent; HYDROGEN-STORAGE PROPERTIES; HYDRIDING/DEHYDRIDING PROPERTIES; MG; ALLOYS; CU; KINETICS; ND; COMPOSITE; NANOCRYSTALLINE; THERMODYNAMICS;

D O I：

10.1016/j.jallcom.2019.04.029

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Slow hydrogen de/absorption kinetics and high hydrogen desorption temperature are still great challenges for both crystalline and amorphous Mg-based alloys. In this work, through using ethanol (E) and ethylene glycol (EG) as milling process control agents (PCAs), partial and controllable crystallization of the melt-spun Mg60Ce10Ni20Cu10 metallic glass was achieved. The microstructure of the as-milled powders and corresponding hydrides was characterized by DSC, SEM, TEM and XRD. De/hydrogenation properties were measured by automatic Sieverts-type apparatus and TG-MS. It was found that the PCAs could lead to partial crystallization of the Mg60Ce10Ni20Cu10 metallic glass due to the dissolving of oxygen into the amorphous structure from PCAs. The introduction of a small amount of the nanocrystals promoted greatly hydrogen de/absorption properties of the melt-spun Mg60Ce10Ni20Cu10 alloy. The hydrogenation temperature could be decreased to below 100 degrees C and the initial hydrogen desorption temperature of the EG-added hydride could be decreased to below 150 degrees C. The structure evolution of the de/hydrogenated samples of the EG-added powder was also studied. The hydrogen-induced crystallizationwas evidently observed in the hydrogenated sample. The ethanol and ethylene glycol was found to be effective milling PCAs to create a composite structure of amorphous and crystalline, and the composite structure greatly enhanced the de/hydrogenation properties. However, the structural stability and reversibility of such composite structure during hydrogenation were still great challenges. (C) 2019 Elsevier B.V. All rights reserved.

引用

页码：835 / 843

页数：9

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