...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics >Effect of annealing treatment on structure and electrochemical performance of quenched MmNi_(4.2)Co_(0.3)Mn_(0.4)Al_(0.3)Mg_(0.03) hydrogen storage alloy
【24h】

Effect of annealing treatment on structure and electrochemical performance of quenched MmNi_(4.2)Co_(0.3)Mn_(0.4)Al_(0.3)Mg_(0.03) hydrogen storage alloy

机译：退火处理对淬火MmNi_（4.2）Co_（0.3）Mn_（0.4）Al_（0.3）Mg_（0.03）储氢合金组织和电化学性能的影响

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

MmNi_(4.2)Co_(0.3)Mn_(0.4)Al_(0.3)Mg_(0.03) hydrogen storage alloy was prepared by single-roll rapid quenching followed by different annealing treatments for 8 h at 1133 K, 1173 K, 1213 K, and 1253 K, respectively. Alloy structure, phase composition, pressure-composition-temperature (PCT) properties, and electrochemical performance of different annealed alloys have been investigated by X-ray diffraction (XRD), field-emission scanning electron microscope (FESEM), energy dispersion spectrometer (EDS), automatic Sieverts-type apparatus, and electrochemical experiments. Electrochemical experiments indicate that the annealing treatment at 1213 K extends cycle life from 193 cycles to 358 cycles, increases the maximum discharge capacity, and slightly decreases the activation befiavior. Alloy structure analyses show that the improvement in cycle life is attributed to the formation of a single CaCu_5-type structure or the relief of an Mg-containing AlMnNi_2-type second phase. Pressure composition isotherms results illustrate that both the hydrogen absorption capability and the dehydriding equilibrium pressure go up with increased annealing temperature. For its good performance/cost ratio, the Mg-added low-Co alloy annealed at 1213 K would be a promising substitution for MmNi_(4.05)Co_(0.45)Mn_(0.4)Al_(0.3) alloy product.
机译：MmNi_（4.2）Co_（0.3）Mn_（0.4）Al_（0.3）Mg_（0.03）储氢合金是通过单辊快速淬火，然后在1133 K，1173 K，1213 K和分别为1253K。通过X射线衍射（XRD），场发射扫描电子显微镜（FESEM），能谱仪（EDS）研究了不同退火合金的合金结构，相组成，压力组成温度（PCT）特性和电化学性能。 ），自动Sieverts型仪器和电化学实验。电化学实验表明，在1213 K下进行的退火处理将循环寿命从193个循环延长到358个循环，增加了最大放电容量，并略微降低了活化性能。合金结构分析表明，循环寿命的改善归因于单个CaCu-5型结构的形成或含Mg的AlMnNi_2型第二相的释放。压力组成等温线结果表明，随着退火温度的升高，吸氢能力和脱水平衡压力均升高。由于其良好的性能/成本比，在1213 K退火的添加Mg的低钴合金将有望替代MmNi_（4.05）Co_（0.45）Mn_（0.4）Al_（0.3）合金产品。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号