用铸造及快淬工艺制备Mg2Ni型Mg2-xLaxNi(x=0,0.2,0.4,0.6)贮氢合金.用XRD、SEM、HRTEM分析铸态及快淬态合金的微观结构,合金的气态贮氢动力学性能用自动控制的Sieverts设备测试,并用程控电池测试仪测试合金的电化学贮氢动力学.结果发现,La替代Mg明显地改变Mg2Ni型合金的相组成.当x≤0.2时,La替代Mg不改变合金的主相Mg2Ni,但出现少量的LaMg3及La2Mg17相.当La替代量x≥0.4时,合金的主相改变为(La,Mg)Ni3+LaMg3.快淬含La合金显示了以非晶相为主的结构,表明La替代Mg提高了Mg2Ni型合金的非晶形成能力.合金的气态及电化学吸放氢动力学对La含量及快淬工艺敏感,适当的快淬处理可以提高合金的气态及电化学贮氢动力学,但获得最佳贮氢动力学的快淬工艺与合金的成分密切相关.
参考文献
[1] | Jain I P;Lal C;Jain A .[J].International Journal of Hydrogen Energy,2010,35(10):5133. |
[2] | Zhao X Y;Ma L Q .[J].International Journal of Hydrogen Energy,2009,34(11):4788. |
[3] | Spassov T.;Koster U. .Thermal stability and hydriding properties of nanocrystalline melt-spun Mg63Ni30Y7 alloy[J].Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics,1998(2):279-286. |
[4] | Huang L J;Liang G Y;Sun Z B et al.[J].Journal of Power Sources,2006,160(01):684. |
[5] | Kwon S N;Baek S H;Mumm D R et al.[J].International Journal of Hydrogen Energy,2008,33(17):4586. |
[6] | Palade P;Sartori S;Maddalena A et al.[J].Journal of Alloys and Compounds,2006,415(1-2):170. |
[7] | Mulas G;Delogu F;Cocco G .[J].Journal of Alloys and Compounds,2009,473(1-2):180. |
[8] | Fernàndez I G;Meyer G O;Gennari F C .[J].Journal of Alloys and Compounds,2008,464(1-2):111. |
[9] | Tanaka K;Kanda Y;Furuhashi M et al.[J].Journal of Alloys and Compounds,1999,293-295:521. |
[10] | Zhang Y H;Li B W;Ren H P et al.[J].International Journal of Hydrogen Energy,2009,34(06):2684. |
[11] | Friedlmeier G;Arakawa M;Hiraia T et al.[J].Journal of Alloys and Compounds,1999,292(1-2):107. |
[12] | Orimo S;Fujii H;Ikeda K .[J].Acta Materialia,1997,45(01):331. |
[13] | Takahashi Y;Yukawa H;Morinaga M .[J].Journal of Alloys and Compounds,1996,242(1-2):98. |
[14] | Ouyang L Z;Yang X S;Dong H W et al.[J].Scripta Materialia,2009,61(04):339. |
[15] | Ouyang L Z;Wen Y J;Xu Y J et al.[J].International Journal of Hydrogen Energy,2010,35(15):8161. |
[16] | Zheng G.;White RE.;Popov BN. .ELECTROCHEMICAL DETERMINATION OF THE DIFFUSION COEFFICIENT OF HYDROGEN THROUGH AN LANI4.25AL0.75 ELECTRODE IN ALKALINE AQUEOUS SOLUTION[J].Journal of the Electrochemical Society,1995(8):2695-2698. |
[17] | Gasiorowski A;Iwasieczko W;Skoryna D et al.[J].Journal of Alloys and Compounds,2004,364(1-2):283. |
[18] | Zhang Y H;Li B W;Ren H P et al.[J].Journal of Alloys and Compounds,2008,461(1-2):591. |
[19] | Ouyang LZ;Qin FX;Zhu M .The hydrogen storage behavior of Mg3La and Mg3LaNi0.1[J].Scripta materialia,2006(12):1075-1078. |
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%