Effect of heat treatment of Mn-Cu precursors on morphology of dealloyed nanoporous copper  

作　　者：TAN Xiu-lan LI Kai NIU Gao YI zao LUO Jiang-shan LIU Ying HAN shan-jun WU Wei-dong TANG Yong-jian 谭秀兰;李恺;牛高;易早;罗江山;刘颖;韩尚君;吴卫东;唐永建(Research Center of Laser Fusion,China Academy of Engineering Physics,Mianyang 621900,China;College of Physical Science and Technology,Central South University,Changsha 410083,China;Department of Materials Science and Engineering,Sichuan University,Chengdu 610065,China)

机构地区：[1]Research Center of Laser Fusion,China Academy of Engineering Physics,Mianyang 621900,China [2]College of Physical Science and Technology,Central South University,Changsha 410083,China [3]Department of Materials Science and Engineering,Sichuan University,Chengdu 610065,China

出　　处：《Journal of Central South University》2012年第1期17-21,共5页中南大学学报（英文版）

基　　金：Project(10804101) supported by the National Natural Science Foundation of China;Project(9140C6805021008) supported by the State Key Development Program for Basic Research of China;Project(2007B08007) supported by the Science and Technology Development Foundation of Chinese Academy of Engineering Physics

摘　　要：Nanoporous copper with nano-scale pore size was synthesized by dealloying Mn-Cu precursor alloy using a free corrosion method. The effects of heat treatment of Mn-Cu precursors on alloy phase, morphology and composition of the resultant nanoporous copper were investigated. It is revealed that the compositions distribute homogeneously in the bulk Mn-Cu precursors, which consequently results in a more fully dealloying for forming nanoporous copper. The alloy phase changes from Cuo.a9Mno.51 and Cuo.21Mno.79 of non-thermally treated precursor to Cuo.33Mn0.67 of heat treated alloy. The residual Mn content in nanoporous copper is decreased from 12.97% to 2.04% （molar fraction） made from the precursor without and with 95 h heat treatment. The typical pore shape of nanoporous copper prepared by dealloying the precursor without the heat treatment is divided into two different zones： the uniform bi-continuous structure zone and the blurry or no pore structure zone. Nanoporous copper is of a uniform sponge-like morphology made from the heat-treated precursor, and the average ligament diameter is 40 nm, far smaller than that from the non-thermally treated precursor, in which the average ligament diameter is estimated to be about 70 nm.Nanoporous copper with nano-scale pore size was synthesized by dealloying Mn-Cu precursor alloy using a free corrosion method.The effects of heat treatment of Mn-Cu precursors on alloy phase,morphology and composition of the resultant nanoporous copper were investigated.It is revealed that the compositions distribute homogeneously in the bulk Mn-Cu precursors,which consequently results in a more fully dealloying for forming nanoporous copper.The alloy phase changes from Cu0.49Mn0.51 and Cu0.21Mn0.79 of non-thermally treated precursor to Cu0.33Mn0.67 of heat treated alloy.The residual Mn content in nanoporous copper is decreased from 12.97% to 2.04%(molar fraction) made from the precursor without and with 95 h heat treatment.The typical pore shape of nanoporous copper prepared by dealloying the precursor without the heat treatment is divided into two different zones:the uniform bi-continuous structure zone and the blurry or no pore structure zone.Nanoporous copper is of a uniform sponge-like morphology made from the heat-treated precursor,and the average ligament diameter is 40 nm,far smaller than that from the non-thermally treated precursor,in which the average ligament diameter is estimated to be about 70 nm.

关 键 词：nanoporous copper PREPARATION DEALLOYING heat treatment MORPHOLOGY 

分 类 号：TG166.2[金属学及工艺—热处理]