Microstructure of Nanocrystalline Fe0.5-xCoxCu0.5 Alloy Powders by Mechanical Alloying

Abstract

Abstract: A series of Fe _0.5-xCo_xCu_0.5 alloys were obtained by mechanical alloying with x=0, 0.1, 0.2, 0.3, 0.4 and 0.5. The microstructure of the samples with different milling times were measured and analyzed by the methods of XRD and DSC considering the transition temperature of γ phase. The results showed that the fcc phases of Fe _0.5-xCo_xCu_0.5 alloys for different compositions had been obtained under60 h milling. The average grain size, the average square root of second strain and the average value of the dislocation density of Fe_0.3Co_0.2Cu_0.5 alloy powders had a little relationship with the composition. ForCo_0.5Cu_0.5, the lattice parameter is smaller than that of pure Cu. The composition and microstructure of the samples with the same milling have a lot of effects on the transition temperature of γ phase and exothermic enthalpy.

Key words: Mechanical alloying, Fe _0.5-xCo_xCu_0.5 alloy, Nanocrystalline powders, Microstructure

CLC Number:

TG146.1

TrendMD:

TONG Fu-Qiang, WANG Chun-Zhong, LI Chang, CHEN Gang, YU Wen-Xue. Microstructure of Nanocrystalline Fe_{_0.5-x}Co_xCu_0.5 Alloy Powders by Mechanical Alloying[J]. Chem. J. Chinese Universities, 2003, 24(6): 964.

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Microstructure of Nanocrystalline Fe_{_0.5-x}Co_xCu_0.5 Alloy Powders by Mechanical Alloying

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