马研,杨卿,孙少东,梁淑华.烧结多孔Cu-Zn合金的脱合金行为[J].稀有金属材料与工程,2019,48(4):1336~1344.[Ma Yan,Yang Qing,Sun Shaodong,Liang Shuhua.Dealloying Behaviors of Sintered Porous Cu-Zn Alloys[J].Rare Metal Materials and Engineering,2019,48(4):1336~1344.]
烧结多孔Cu-Zn合金的脱合金行为
投稿时间:2017-12-27  修订日期:2018-01-28
中文关键词:  微纳米多孔铜  粉末冶金  脱合金  微观结构  腐蚀行为
基金项目:国家自然科学基金(51471132);陕西省杰出青年科学基金
中文摘要:
      本文采用粉末冶金工艺制备微米多孔Cu-Zn合金前驱体,进而脱合金制备微纳米多孔铜。首先研究了烧结温度对前驱体合金微观结构的影响,然后对比了不同前驱体在不同浓度盐酸溶液中脱合金后的相组成和微观形貌,最后分析了前驱体合金在脱合金过程中的电化学行为。结果表明,以粉末冶金法与脱合金法相结合,可制备出微纳米双级多孔铜。不同烧结温度会造成前驱体合金的物相含量和孔结构发生变化,进而造成其脱合金过程的显著差异。Cu30Zn70前驱体包含Cu5Zn8与CuZn5两相,脱合金时CuZn5相优先被腐蚀;而Cu50Zn50前驱体仅含CuZn相,腐蚀速率更慢。在0.1mol/L腐蚀液中,试样不能完全脱合金;腐蚀液浓度增大至0.5mol/L时,前驱体中的Zn完全脱去,微米级韧带由纳米多孔结构构成,其微米孔孔径约3.02~3.68μm,纳米孔孔径约157~183nm。
Dealloying Behaviors of Sintered Porous Cu-Zn Alloys
英文关键词:micro-/nano-porous copper  powder metallurgy  dealloying  microstructure  corrosion behavior
英文摘要:
      Microporous Cu-Zn were prepared by powder metallurgy, which were then employed as precursors to prepare micro-/nano-porous coppers by dealloying. Firstly, the effect of sintering temperature on the microstructures of Cu-Zn precursors was investigated. Then, the phase constitution and microstructures of Cu-Zn alloys after dealloying in HCl solutions with different concentration were compared. Finally, the electrochemical behavior of Cu-Zn precursors during dealloying process was analyzed. The results showed that micro-/nano-porous coppers can be prepared by powder metallurgy and dealloying. Different sintering temperature contributed to the variation of phase content and porous structure of Cu-Zn precursors, which then caused significant differences during delloying process. Cu30Zn70 precursors consisted of Cu5Zn8 and CuZn5, and CuZn5 was corroded preferentially during dealloying process. While Cu50Zn50 precursors consisting of single phase CuZn showed a much slower corrosion rate. Both precursors were dealloyed incompletely in 0.1mol/L HCl solution. When the concentration of HCl solution was increased to 0.5mol/L, Zn was completely dealloyed from both precursors and nanoporous structures were formed in micro-scale ligaments. The diameters of micro pores and nano pores were about 3.02~3.68μm and 157~ 183nm, respectively.
作者单位E-mail
马研 西安理工大学材料科学与工程学院 125815262@qq.com 
杨卿 西安理工大学材料科学与工程学院 yangqing@xaut.edu.cn 
孙少东 西安理工大学材料科学与工程学院  
梁淑华 西安理工大学材料科学与工程学院  
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