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

作者:Huang, LJ (Huang, L. J.)^[1 ]; Wang, H (Wang, H.)^[1 ]; Liu, JW (Liu, J. W.)^[1 ]; Zhang, C (Zhang, C.)^[1 ]; Ouyang, LZ (Ouyang, L. Z.)^[1 ]; Zhu, M (Zhu, M.)^[1 ]

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.

作者关键词:Hydrogen storage; Mg-based amorphous alloy; Ball milling; Nanocrystalline; Milling process control agent

KeyWords Plus:HYDROGEN-STORAGE PROPERTIES; HYDRIDING/DEHYDRIDING PROPERTIES; MG; ALLOYS; CU; KINETICS; ND; COMPOSITE; NANOCRYSTALLINE; THERMODYNAMICS

通讯作者地址:Zhu, M (通讯作者)

South China Univ Technol, Key Lab Adv Energy Storage Mat Guangdong Prov, Guangzhou 510641, Guangdong, Peoples R China.   增强组织信息的名称     South China University of Technology

地址:

[ 1 ] South China Univ Technol, Key Lab Adv Energy Storage Mat Guangdong Prov, Guangzhou 510641, Guangdong, Peoples R China   增强组织信息的名称     South China University of Technology

电子邮件地址:memzhu@scut.edu.cn

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