Short-Range and Medium-Range Order in Liquid Cu-Ni Alloy
Authors:
- 1 February 2002
- journal article
- Published by IOP Publishing in Chinese Physics Letters
- Vol. 19 (2) , 233-235
Abstract
The liquid structure of the 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 clearly exists up to a 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 the liquid Cu70Ni30 alloy mainly consist of Cu atoms with centred Ni atoms. The appearance of the pre-peak in the structure factor of the liquid Cu70Ni30 alloy is caused by the interaction between centred Ni atoms locating in the neighbouring atomic clusters.Keywords
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