Influence of severe plastic deformation and some additives on hydrogenation of ZK60 alloy. (April 2021)

• Record Type: Journal Article
• Authors: Abbas, Aqeel; Hu, Kun-Che; Lin, Hsin-Chih; Lin, Kun-Ming
• Is Part Of: Journal of physics and chemistry of solids. Volume 151(2021)
• Publication Date: 2021-04
• Subjects: Titanium -- Vanadium -- Activated carbon -- High energy ball milling -- Hydrogen storage materials -- Severe plastic deformation; Solids -- Periodicals; Solides -- Périodiques; Solids; Periodicals; 530.41
• DOI: 10.1016/j.jpcs.2020.109927
• Languages: English
• ISSNs: 0022-3697

Abstract

Abstract: Using ZK60 commercial magnesium alloy as hydrogen storage material, the effects of equal channel angular extrusion (ECAP) passes and different weight percentages of additives (activated carbon, vanadium and titanium) on hydrogen absorption characteristics were studied. ECAPed ZK60 with additives was prepared by high-energy ball milling for 20 h .The rate of hydrogenation was measured at different temperatures for five cycles using a Sievert's apparatus. The results reveal that hydrogen absorption increased to 5.3 wt% after 12 passes of ECAP in monolithic ZK60. The 12-pass ECAPed ZK60 along with the addition of 5 wt% activated carbon, and 2 wt% vanadium has improved hydrogenation to 6.7 wt% at 350 °C. The hydrogen absorption capacity is increased after each cycle for most ECAPed ZK60 samples, except that doped with 10 wt% activated carbon and 2 wt% titanium in which hydrogen absorption capacity is significantly reduced from 5.6 wt% to 3.2 wt% after the first cycle at 300°C . Highlights: ZK60 was deformed using ECAP and ball milled with Vanadium, Activated carbon and Titanium. Hydrogenation capacities was analyzed using Sieverts apparatus. Hydrogenation capacities increase with the increase in number of passes. 12 passed ECAPed ZK60 with 5 wt% activated carbon and 2 wt% Vanadium has maximum hydrogen capacity.