...
  • 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 >Metastable phase formation by chemical leaching of Al-Co-Cu ternary alloys
【24h】

Metastable phase formation by chemical leaching of Al-Co-Cu ternary alloys

机译：Al-Co-Cu三元合金化学浸出形成亚稳相

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

The formation of a metastable nanocrystalline Co-Cu alloy was attempted by means of chemical leaching of Alatoms from various ternary Al-Co-Cu alloys prepared by rapidsolidification or mechanical alloying. Almost all Al atmos wereremoved by the chemical leaching and fine particles of asupersaturated metastable Co-Cu solid solution were formed bychanging the chemical composition and the crystallographicstructure from the original one to fcc. Most of the particle sizeswere below one hundred nanometer. A few nanometer sizeparticles were also observed by TEM observation. Thesupersaturated solid solution decomposed into Co and Cu phasesafter a heat treatment. The variation of the saturationmagnetization of the leached specimens gradually decreased withincreasing temperature. After reaching a minimum, the saturationmagnetization increased and approached that normal value of fccCo. This variation was the result of the precipitation of Co fromthe supersaturated fcc phase. The DSC curves also showed anexothermic peak indicative of Co precipitation andcorresponding to the variation of the saturation magnetizationwith temperature. Precipitation was also confirmed by X-raydiffraction. It was concluded that the chemical leaching processmight open the possibility to form new metastable materials.
机译：通过从通过快速凝固或机械合金化制备的各种三元Al-Co-Cu合金中化学浸出Alatom，试图形成亚稳态的纳米晶Co-Cu合金。通过化学浸出去除了几乎所有的Al原子，通过将化学成分和晶体结构从原始的FCC转变为FCC，形成了过饱和的亚稳态Co-Cu固溶体的细颗粒。大多数粒径小于一百纳米。通过TEM观察还观察到一些纳米尺寸的颗粒。热处理后，过饱和固溶体分解为Co和Cu相。随着温度的升高，浸出样品的饱和磁化强度变化逐渐减小。达到最小值后，饱和磁化强度增加并接近fccCo的正常值。这种变化是过饱和fcc相中Co沉淀的结果。 DSC曲线还显示出放热峰，其指示Co的沉淀并且对应于饱和磁化强度随温度的变化。 X射线衍射也证实了沉淀。结论是化学浸出过程可能打开形成新的亚稳材料的可能性。

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