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Short-Range and Medium-Range Order in Liquid Cu-Ni Alloy |
| WANG Huan-Rong1;TIAN Xue-Lei1;TENG Xin-Ying1;SHI Zhi-Qiang1;YE Yi-Fu1,2;MIN Guang-Hui1;Jing-Yu1 |
| 1Key Laboratory of Liquid Structure and Heredity of Materials, Ministry of Education, Shandong University, Ji’nan 250061
2College of Resource and Environmental Engineering, East China University of Science and Technology, Shanghai 200237
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| Cite this article: |
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WANG Huan-Rong, TIAN Xue-Lei, TENG Xin-Ying et al 2002 Chin. Phys. Lett. 19 233-235 |
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Abstract The liquid structure of Cu70Ni30 alloy has been investigated using a θ - θ high-temperature x-ray diffractometer. At all temperatures above its liquidus, a distinct pre-peak has been found around a scattering vector magnitude of 13.5nm-1. The height of the pre-peak decreases gradually with increasing temperature but it is clearly existent up to temperature of 1400°C. This behaviour indicates that stable medium-range order atomic clusters exist in the melt. It is concluded that the short-range order atomic clusters of liquid Cu70Ni30 alloy mainly consist of Cu atoms with centered Ni atoms. The appearance of the pre-peak in the structure factor of liquid Cu70Ni30 alloy is caused by the interaction between centered Ni atoms locating in the neighbouring atomic clusters.
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61.10.Eq
61.25.Mv
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Published: 01 February 2002
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