用真空电弧熔炼制备AB2型Sc0.8 Zr0.1Y0.1 Mn2-xNix(x=0 ～2.0)储氢合金,利用X射线衍射(XRD)和扫描电镜/能谱分析(SEM/EDS)研究了吸氢前后Ni元素替代Mn对ScMn2基合金微观结构的影响,用Sievert装置和热重-差热分析仪(TG/DSC)测试了合金的压力-组成-温度(P-C-T)曲线和吸放氢动力学.研究结果表明,合金铸态组织主要由Laves主相和少量ScNi及富Y的第二相组成,其中稀土Sc和Y元素易与Ni形成相应的金属间化合物相.随Ni含量x的增加,合金基体的Laves相组织结构由C14型向C15型转变,x=0时,合金组织基本为C14型Laves相单相组织,x=2.0时,合金组织则完全转变为C15型Laves相单相组织.Ni元素替代Mn对合金的气态吸放氢动力学行为和吸氢P-C-T曲线影响较大.随Ni含量的增加,合金吸氢动力学与活化性能逐渐变慢,但其放氢温度明显降低,氢化物生成焓减小(-35.05～-18.72kJ ·mol-1),储氢平台压升高,储氢容量降低;室温时合金最大储氢量达2.18％(质量分数),储氢后其晶格膨胀率△V/V为10.63％～27.32％,吸氢前后合金主相仍保持C14型或C15型相结构,并未发生新的氢致相变,亦无氢致非晶化现象.
参考文献
| [1] | Iosub V;Joubert JM;Latroche M;Cerny R;Percheron-Guegan A .Hydrogen cycling induced diffraction peak broadening in C14 and C15 Laves phases[J].International Journal of Quantum Chemistry,2005(6):1799-1806. |
| [2] | K. Young;T. Ouchi;B. Reichman .Optimization of Co-content in C14 Laves phase multi-component alloys for NiMH battery application[J].Journal of Alloys and Compounds,2010(1):202-210. |
| [3] | K. Young;T. Ouchi;B. Huang;B. Chao;M.A. Fetcenko;L.A. Bendersky;K. Wang;C. Chiu .The correlation of C14/C15 phase abundance and electrochemical properties in the AB_2 alloys[J].Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics,2010(2):841-848. |
| [4] | Antonov VE;Bashkin IO;Fedotov VK;Khasanov SS;Hansen T;Ivanov AS;Kolesnikov AI;Natkaniec I .Crystal structure and lattice dynamics of high-pressure scandium trihydride[J].Physical review, B. Condensed matter and materials physics,2006(5):4107-1-4107-6-0. |
| [5] | Jonas Angstrom;Robert Johansson;Line Holdt Rude;Carsten Gundach;Ralph H. Scheicher;Rajeev Ahuja;Olle Eriksson;Torben R. Jensen;Martin Sahlberg .Hydrogen storage properties of the pseudo binary laves phase (Sc_(1-x)Zr_x)(Co_(1-y)Ni_y)_2 system[J].International journal of hydrogen energy,2013(23):9772-9778. |
| [6] | 李武会,田保红,马坪,吴尔冬.ScMn2合金贮氢（氘）性能[J].金属学报,2012(07):822-829. |
| [7] | Wuhui Li;Erdong Wu .Structure and hydrogen absorbing properties of ScCrMn alloy[J].Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics,2012(1):169-175. |
| [8] | Matsumura T.;Morinaga M.;Yukawa H. .Alloying effects on the electronic structure of ZrMn2 intermetallic hydride[J].Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics,1998(2):192-200. |
| [9] | Figiel H.;Paul-Boncour V.;Lindbaum A.;Gratz E.;Latroche M.;Escorne M.;Percheron-Guegan A.;Mietniowski P.;Przewoznik J. .Hydrogen induced phase transitions in YMn2[J].Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics,1998(1/2):29-37. |
| [10] | R. Yang;Y. M. Wang;Y. Zhao .Transition metal alloying effects on chemical bonding in TiH_2[J].Acta materialia,2002(1):109-120. |
| [11] | Asheesh Kumar;Seemita Banerjee;C.G.S. Pillai;S.R. Bharadwaj .Hydrogen storage properties of Ti_(2-x)CrVM_x(M = Fe, Co, Ni) alloys[J].International journal of hydrogen energy,2013(30):13335-13342. |
| [12] | Qian Li;Kuo-Chih Chou;Qin Lin;Li-Jun Jiang;Feng Zhan .Influence of the initial hydrogen pressure on the hydriding kinetics of the Mg_(2-x)Al_xNi (x = 0, 0.1) alloys[J].International journal of hydrogen energy,2004(13):1383-1388. |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%