CAJ | 학술논문

采用机械球磨的方法,制备了不同成分和显微组织的MgxNi（x=1%、1.5%、2%（原子分数））合金粉,并采用X射线衍射（XRD）和扫描电子显微镜的方法研究了Mg/Ni比对机械球磨过程中Mg-Ni合金粉末组织结构演变的影响。在不同的电位扫描速度下,对具有不同Mg/Ni比和显微组织结构的Mg-Ni合金电极循环伏安曲线进行了测量,并由此计算出了氢在这些电极中的扩散系数,分析了合金成分和显微组织对Mg-Ni合金电极中氢扩散能力的影响。其结果表明,降低Mg/Ni比,能提高Mg-Ni合金在球磨过程中非晶相的形成能力,Mg-Ni和Mg1.5Ni合金获得完全非晶相的球磨时间分别是120和160h。在由细小、分散并且完全非晶态的Mg-Ni合金颗粒制备的电极中,氢表现出较强的扩散能力,其扩散系数为1.98×10-8cm2/s。
채용궤계구마적방법,제비료불동성분화현미조직적MgxNi（x=1%、1.5%、2%（원자분수））합금분,병채용X사선연사（XRD）화소묘전자현미경적방법연구료Mg/Ni비대궤계구마과정중Mg-Ni합금분말조직결구연변적영향。재불동적전위소묘속도하,대구유불동Mg/Ni비화현미조직결구적Mg-Ni합금전겁순배복안곡선진행료측량,병유차계산출료경재저사전겁중적확산계수,분석료합금성분화현미조직대Mg-Ni합금전겁중경확산능력적영향。기결과표명,강저Mg/Ni비,능제고Mg-Ni합금재구마과정중비정상적형성능력,Mg-Ni화Mg1.5Ni합금획득완전비정상적구마시간분별시120화160h。재유세소、분산병차완전비정태적Mg-Ni합금과립제비적전겁중,경표현출교강적확산능력,기확산계수위1.98×10-8cm2/s。
In this study,MgxNi（x=1,1.5,2,in atom percent） alloy powders with different microstructures were prepared by using mechanical ball milling method.The effect of Mg/Ni ratio on the microstructure evolution of the alloys during ball milling was investigated by X-ray diffraction（XRD） and scanning electronic microscope（SEM） observation.The cyclic voltammetry curves of the Mg-Ni alloy electrodes with the different compositions and microstructure were measured under the different potential scan rates,and the hydrogen diffusion coefficients in these electrodes were calculated.The results show that lowering Mg/Ni ratio can promote the glass forming ability of Mg-Ni alloys during ball milling,and the complete amorphous structure can be obtained after ball-milled for 120 and 160h for MgNi and Mg1.5Ni alloys,respectively.Hydrogen exhibits high diffusion ability in the electrode made by the fine and disperse MgNi alloy powders in the complete amorphous strcuture.The hydrogen diffusion coefficient was 1.98×10-8 cm2/s in it.