欢迎登录材料期刊网

材料期刊网

高级检索

采用金相显微镜、X射线衍射(XRD)、扫描电镜(SEM)、结合能谱(EDS)研究了Sn对镁阳极材料显微组织、相结构、表面形貌及成分分布的影响;并通过恒电流法、动电位极化法、排水集气法等研究了该镁合金的腐蚀行为和电性能.结果表明:合金元素Sn、Pb的加入可以抑制棒状β-Mg17Al12相沿晶界析出,合金晶粒尺寸均匀,随着Sn含量的增大,颗粒相Mg2Sn增多;均匀化处理使大部分β-Mg17Al12相溶解,而残留Mg2Sn和Mg2Pb未溶相;Sn的加入可以提高镁合金自腐蚀电位,降低析氢率,当Sn含量为2wt%时,镁合金阳极的放电电压和电流效率最大.由于镁合金的“负差数效应”使得析氢率随电流密度的增大而增大,当电流密度为10 mA/cm2时,电流效率最高,可达88%;腐蚀产物主要成分为Mg(OH)2、SnO2及MgSnO3,且疏松,易脱落,使镁合金阳极的工作电极电位负而且稳定,可促进电池反应深入进行.

参考文献

[1] Schlapbach L;Züttel A .[J].Nature,2001,414:353.
[2] Simi(c)i(c) M V;Zduji(c) M;Dimitrijevi(c) R et al.[J].Journal of Power Sources,2006,158:730.
[3] Spassov T;K(o)ster U .[J].Journal of Alloys and Compounds,1999,287:243.
[4] Orimo S;Fujii H .[J].Journal of Alloys and Compounds,1996,232:L16.
[5] Hong T W;Kim Y J .[J].Journal of Alloys and Compounds,2002,330-332:584.
[6] Spassov T;Solsona P;Suri(n)ach S et al.[J].Journal of Alloys and Compounds,2002,345:123.
[7] Song M Y;Kwon S N;Bae J S et al.[J].International Journal of Hydrogen Energy,2008,33:1711.
[8] 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.
[9] Orimo S;Fujii H .[J].Applied Physics A:Materials Science and Processing,2001,72:167.
[10] Tanaka K;Kanda Y;Furuhashi M et al.[J].Journal of Alloys and Compounds,1999,295:521.
[11] Mulas G;Schiffini L;Cocco G .[J].Journal of Materials Research,2004,19:3279.
[12] Woo J H;Lee K S .[J].Journal of the Electrochemical Society,1999,146:819.
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:
  • 1
    0%
  • 2
    0%
  • 3
    0%
  • 4
    0%
  • 5
    0%