Preparation of Al-Cu-Fe-(Sn,Si) quasicrystalline bulks by laser multilayer cladding  

作　　者：Li-ping Feng Eric Fleury Guo-sheng Zhang 

机构地区：[1]Tianjin Research Institute of Construction Machinery, Tianjin 300409, China [2]State Key Laboratory of Tribology, Tsinghua University, Beijing 100084, China [3]Center for High Temperature Energy Materials, Korea Institute of Science ＆ Technology （K/ST）, Seou1130 650, Korea

出　　处：《International Journal of Minerals,Metallurgy and Materials》2012年第5期434-440,共7页矿物冶金与材料学报（英文版）

基　　金：supported by the National Key Technologies R&D Program of China (No.2011BAF11B00)

摘　　要：（A165Cu20Fe15）100-xSnx （x=0, 12, 20, 30） and A157SitoCulsFe15 powders were cladded on a medium carbon steel （45# steel） substrate by laser multilayer cladding, respectively. The phases and properties of the produced quasicrystalline bulks were investigated. It was found that the main phases in the A165Cu2oFe15 sample were crystalline L-Al13Fe4 and icosahedral quasicrystal together with a small volume fraction of 0-A12Cu phase. The volume fraction of icosahedral phase decreased as the Sn content in the （A165Cu20Fe18）100-xSnx samples increased owing to the formation of β-CuSn phase. The increase of Sn content improved the brittleness of the quasicrystal samples. The morphology of the solidification microstructure in the Al57Si10Cu18Fe15 sample changed from elongated shape to spherical shape due to the addition of Si. The nanohardness of the laser multilayer cladded quasicrystal samples was equal to that of the as-cast sample prepared by vacuum quenching. In terms of hardness, the laser cladded A157Si10Cu18Fe15 quasicrystalline alloy has the highest value among all the investigated samples.（A165Cu20Fe15）100-xSnx （x=0, 12, 20, 30） and A157SitoCulsFe15 powders were cladded on a medium carbon steel （45# steel） substrate by laser multilayer cladding, respectively. The phases and properties of the produced quasicrystalline bulks were investigated. It was found that the main phases in the A165Cu2oFe15 sample were crystalline L-Al13Fe4 and icosahedral quasicrystal together with a small volume fraction of 0-A12Cu phase. The volume fraction of icosahedral phase decreased as the Sn content in the （A165Cu20Fe18）100-xSnx samples increased owing to the formation of β-CuSn phase. The increase of Sn content improved the brittleness of the quasicrystal samples. The morphology of the solidification microstructure in the Al57Si10Cu18Fe15 sample changed from elongated shape to spherical shape due to the addition of Si. The nanohardness of the laser multilayer cladded quasicrystal samples was equal to that of the as-cast sample prepared by vacuum quenching. In terms of hardness, the laser cladded A157Si10Cu18Fe15 quasicrystalline alloy has the highest value among all the investigated samples.

关 键 词：QUASICRYSTALS laser cladding phase composition MORPHOLOGY mechanical properties nanohardness 

分 类 号：TG161.93[金属学及工艺—热处理] TG156.99[金属学及工艺—金属学]