(西安理工大學(xué) 材料科學(xué)與工程學(xué)院， 西安 710048)
摘 要: 利用負(fù)壓滲流法制備出稀土泡沫鋅鋁合金，研究稀土La和Ce的添加量對(duì)泡沫鋅鋁合金組織和阻尼性能的影響。結(jié)果表明：在泡沫鋅鋁合金中加入Al-10％Ce或Al-10％La中間合金細(xì)化了組織，同時(shí)提高了泡沫鋅鋁合金的阻尼能力；稀土元素的添加量為0.3%時(shí)(質(zhì)量分?jǐn)?shù))可獲得最佳的變質(zhì)效果和最高的阻尼能力；相對(duì)于未變質(zhì)而言，阻尼能力提高了近3倍；稀土泡沫鋅鋁合金的阻尼機(jī)制與相界面的非彈性粘滯性流動(dòng)有關(guān)，合金的相界面越多，阻尼性能就越好。
關(guān)鍵字: 鑭；鈰；泡沫鋅鋁合金；阻尼性能
（School of Materials Science and Engineering, Xi’an University of Technology,Xi’an 710048, China)）
Abstract:Zn-22%Al foamed alloys with rare earth La or Ce additives were fabricated by the vacuum infiltration casting, the effects of La and Ce on the modification of microstructure and damping capacity of Zn-22%Al alloy foam were investigated. The results show that the addition of Al-10％Ce and Al-10％La master alloy into the Zn-22%Al alloy foam can refine microstructure and improve the damping capacity. The best modification effect and the highest damping capacity can be obtained by the addition of 0.3%RE. The damping mechanism of Zn-22%Al alloy foam is associated with the non-elastic viscous flow of interfaces, and the more the interfaces, the higher the damping capacity of Zn-22%Al alloy foam.
Key words: La; Ce; ZA alloy foam; damping capacity
