Tailoring ultra-strong nanocrystalline tungsten nanofoams by reverse phase dissolution
作者: Mingyue ZhaoInas IssaManuel J. PfeifenbergerMichael WurmshuberDaniel Kiener
作者单位: 1Chair of Materials Physics, Montanuniversität Leoben, Jahnstraße 12, 8700 Leoben, Austria
2Erich Schmid Institute of Materials Science, Austrian Academy of Sciences, Jahnstraße 12, 8700 Leoben, Austria
刊名: Acta Materialia, 2020, Vol.182 , pp.215-225
来源数据库: Elsevier Journal
DOI: 10.1016/j.actamat.2019.10.030
关键词: Nanoporous tungstenSelective phase dissolutionMicrostructure characterizationNanoindentation
原始语种摘要: Abstract(#br)Bulk nanoporous tungsten as an extremely strong and low density nanocrystalline material was for the first time created to satisfy the need for advanced high performance materials that can endure harsh environments. Synthesis of nanoporous tungsten was achieved by a unique procedure involving severe plastic deformation of a coarse-grained tungsten-copper composite followed by selective dissolution of the nobler copper phase. The used ammonium persulfate etching solution, in which the less noble tungsten is chemically stable, is proved to be effective in removing the nobler copper phase. A nanoporous microstructure characterized by a network of interconnected nanocrystalline tungsten ligaments and interconnected nanopores was obtained. Based on a high-resolution interface...
全文获取路径: Elsevier  (合作)
影响因子:3.941 (2012)

  • tungsten 
  • dissolution 溶解
  • reverse 逆的
  • formation 建造
  • microstructure 微结构
  • plastic 可塑性的
  • material 充填料
  • copper 
  • extremely 极端
  • interconnected 相互联系的