新型轻质高阻尼Mn-27Cu多孔合金的制备及其性能研究  

Preparation and Properties of Novel Mn-27Cu Porous Alloy with a Low Density and High Damping Capacity

作　　者：李刚[1] 王辉[1] 王先平 高云霞 蒋卫斌 方前锋 LI Gang;WANG Hui;WANG Xianping;GAO Yunxia;JIANG Weibin;FANG Qianfeng(Science and Technology on Reactor Fuel and Materials Laboratory,Nuclear Power Institute of China,Chengdu 610041,China;Key Laboratory of Materials Physics,Institute of Solid State Physics,Chinese Academy of Sciences,Hefei 230031,China)

机构地区：[1]中国核动力研究设计院,反应堆燃料及材料重点实验室,成都610041 [2]中国科学院固体物理研究所,材料物理重点实验室,合肥230031

出　　处：《有色金属工程》2020年第5期1-5,共5页Nonferrous Metals Engineering

基　　金：装备部装备预先研究项目(32102030406)。

摘　　要：采用粉末冶金法制备了Mn-27Cu(原子百分比,下同)二元多孔合金,通过扫描电子显微镜(SEM)观察,Mn-27Cu二元多孔合金中亚微米或毫米量级的孔分布均匀。与相同组分的致密Mn-Cu合金相比,多孔材料的密度大幅下降,当孔隙率为71.5%时,密度为2.3 g/cm^3,约是致密Mn-Cu合金密度的1/3;在微应变振幅(10^-6)下,Mn-27Cu二元多孔合金的阻尼性能最高可达0.012,属于微振动敏感型高阻尼材料范畴;其最大抗压强度约为41.2 MPa,但其压缩坍塌过程却表明该Mn-Cu多孔合金属于脆性材料。A novel porous material based on Mn-Cu with spherical pores is prepared by the powder metallurgy principle,and its phase and microstructure were characterized via SEM.The results indicate that the Mn-Cu porous materials exhibit a perfect homogeneous distribution.The damping and mechanical properties were evaluated by multi-functional internal friction apparatus and the testing machines,respectively.The results indicate that comparing with the dense Mn-Cu alloy,Mn-Cu porous materials with a porosity of 71.5%have a much lower density of 2.3 g/cm^3,which is about one third of the density for the dense Mn-Cu alloy.Under the microstrain amplitude(10^-6),the damping peak of Mn-Cu porous material can be up to 0.012,which made it come into the domain of a typical micro-vibration-sensitive high damping materials.The Mn-Cu porous material is typical brittle porous material with a highest compressive strength of about 41.2 MPa.

关 键 词：锰铜合金 多孔材料 高阻尼 孪晶滑移 力学性能 

分 类 号：TB383.4[一般工业技术—材料科学与工程] TG139.6[金属学及工艺—合金]