Study of Employing Rapid-Solidifying Atomization to Make Mg-Ni-Gd Metallic Glass Powders and Their Hydrogen Absorption Behavior

• Main Authors: Yu-HanChen, 陳育翰
• Other Authors: Chi-Yuan Tsao
• Format: Others
• Language: zh-TW
• Published: 2012
• Online Access: http://ndltd.ncl.edu.tw/handle/62793369840393940945

碩士 === 國立成功大學 === 材料科學及工程學系碩博士班 === 100 === The Mg-Ni-Gd metallic glass powders were manufactured by the gas-atomization. The main powders size were measured as 70~90μm. Under the examinations as X-Ray Diffraction (XRD), Differential Scanning Calorimeter (DSC) and Transmission Electronic Microscope (TEM) powders show up as amorphous. The gas-atomization process in our lab can manufacture low glass-forming ability amorphous powders stably. The powders’ glass-transition temperature and crystal temperature was synthesized by DSC, which phases under characteristic temperature was made by heat treatment and analyzed by XRD. Powders’ compositions are Mg78Ni13Gd9 verified by Inductively Coupled Plasma Mass Spectrometry (ICP). As the aim of developing hydrogen storage metallic glass powders, powders were put on hydrogen storage process. The metallic glass powders atomic structure and thermal-stability under hydrogen atmosphere are discussed, hydrides formed after hydrogen storage are analyzed their morphology and phases. With the changes of heating process under hydrogen storage experiment, those phenomena mentioned before are also discussed and compared. Those conclusions will be summarized to figure out the hydrogen storage properties and mechanism of Mg78Ni13Gd9 metallic glass powders.