Effect of Different Carbon Additives on Hydrogen Storage Properties of AZ31 Magnesium Alloy by High Energy Ball Milling (HEBM) or Equal Channel Angular Pressing (ECAP)

Autor: Yong-Lin Chen, 陳永霖
Rok vydání: 2018
Druh dokumentu: 學位論文 ; thesis
Popis: 106
This study investigates the effect of additives on the hydrogen storage properties of AZ31 magnesium alloys. Activated carbon (AC), carbon black (CB), graphene (G) were used as catalysts in different weight percentages (0wt.%, 1wt.%, 3wt.%). Discuss the effect of different carbon additives and their content on the hydrogen storage performance. In addition, this study also explored the effect of different processes on hydrogen storage performance. Use the same process time as a benchmark for comparison. Firstly, the AZ31 magnesium matrix composites with different carbon additives were prepared by casting, and then processed by high energy ball milling (HEBM) or equal channel angular pressing (ECAP). Finally, the measurement of hydrogen absorption and desorption is performed. The results show that after the HEBM process, adding carbon material can effectively improve the hydrogen storage performance of AZ31 magnesium alloys. The increase in hydrogen storage performance from large to small additions of graphene, carbon black and activated carbon. After the ECAP process, only added activated carbon or carbon black can effectively improve the hydrogen storage performance of AZ31 magnesium alloys. The addition of graphene will result in a decrease in hydrogen storage performance. The increase in hydrogen storage performance from large to small addition of carbon black and activated carbon. Compared with the HEBM or ECAP process, the AZ31 magnesium alloy without added carbon has better hydrogen storage performance through the ECAP process, while the AZ31 magnesium matrix composite with carbon added has better hydrogen storage performance through the HEBM process.
Databáze: Networked Digital Library of Theses & Dissertations
Externí odkaz: