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铁道科学与工程学报

JOURNAL OF RAILWAY SCIENCE AND ENGINEERING

Vol. 7    No. 1    March 1997

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INFLUENCE OF CERIUM CONTENT ON DAMPING CAPACITIES OF AS-SPRAY DEPOSITED HIGH SILICON ALLOY ZA27
Liu Yongchang1; Lu Yili1; Yang Gencang1; Zhu Zhengang2

1.State Key Laboratory of Solidification Processing; Northwestern Polytechnic University; Xi’an 710072;
2.Laboratory of Internal Friction and Defects in Solids; Chinese Academy of Sciences; Hefei 230031

Abstract:To improve the damping capacity of metals and alloys, the microstructures and damping capacities of as spray deposited high silicon alloy ZA27 modified by 0.3%, 0.5%, 0.7% cerium were studied. The microstructure of the alloy ZA27 is made up of fine lamellar eutectoid, porosity, light dot like phase and polygonal silicon rich phase. The damping capacities of the as spray deposited alloy ZA27 modified by 0.5% cerium were greatly improved. The high damping capacities attributed primarily to phase interface thermoelastic damping between the lamellar phases with various crystal substructures, except for porosities and fine grain boundaries.

 

Key words: spray deposition damping capacity cerium modification

ISSN 1672-7029
CN 43-1423/U

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