(1. 重慶大學(xué) 材料科學(xué)與工程學(xué)院，重慶 400044；
2. 重慶大學(xué) 國(guó)家鎂合金材料工程技術(shù)中心，重慶400044)
摘 要: 采用機(jī)械球磨法制備Mg2Cu合金，并以該合金為基礎(chǔ)，添加質(zhì)量分?jǐn)?shù)為5%的單質(zhì)(C、Co、Ni、Cu)或氧化物(Cr2O3、Fe3O4、TiO2、V2O5)，通過(guò)機(jī)械球磨對(duì)合金進(jìn)行表面復(fù)相改性。采用p—c—T測(cè)試儀測(cè)定合金的儲(chǔ)氫性能，研究添加不同單質(zhì)和氧化物對(duì)Mg2Cu合金儲(chǔ)氫性能的影響。結(jié)果表明：在200 ℃和300 ℃下，添加C或Fe3O4能夠有效提高M(jìn)g2Cu合金的活性，使其易與氫氣反應(yīng)，并縮短吸氫時(shí)間，增大吸氫量，改善放氫效果；在400 ℃下，添加Co、Ni、TiO2或Fe3O4能夠有效縮短吸氫時(shí)間，改善合金的綜合儲(chǔ)氫性能。
關(guān)鍵字: 儲(chǔ)氫合金；Mg2Cu；機(jī)械球磨；表面復(fù)相改性；儲(chǔ)氫性能
Mg2Cu-based hydrogen storage alloys
（1. College of Materials Science and Engineering, Chongqing University, Chongqing 400044, China;
2. National Engineering Research Center for Magnesium Alloys, Chongqing University, Chongqing 400044, China）
Abstract:Mg2Cu alloys were prepared by mechanical grinding. In order to modify the surface performance of the alloys, 5%(mass fraction) of simple substances such as C, Co, Ni and Cu or oxides such as Cr2O3, Fe3O4, TiO2, V2O5 were added into Mg2Cu alloys by mechanical grinding. The hydrogen storage properties of the alloys were determined by p—c—T apparatus. The effects of simple substances and oxides on the hydrogen storage properties of the alloys were investigated. The results show that the addition of C or Fe3O4 into Mg2Cu alloys can improve the reactivities of the alloys at 200 ℃ and 300 ℃. At those temperatures, the alloys containing C or Fe3O4 can react easily with hydrogen, resulting in that the hydriding times of the alloys can be shortened and the hydriding/dehydriding capacities of the alloys can be improved. The hydrogen absorption times of Mg2Cu alloys with Co, Ni, TiO2 or Fe3O4 can be effectively shortened and the comprehensive hydrogen storage properties of the alloys can be improved at 400 ℃.
Key words: hydrogen storage alloy; Mg2Cu; mechanical grinding; multi-phase surface modification; hydrogen storage property
