Title :
Structural correlations between liquid and solid Ag70Au30 alloy
Author :
Bai, Yanwen ; Bian, Xiufang ; Yang, Lei ; Qin, Xubo ; Guo, Kai
Author_Institution :
Key Lab. for Liquid-Solid Struct. Evolution & Process. of Mater., Shandong Univ., Jinan, China
Abstract :
Through the high temperature X-ray diffraction, structural evolution of Ag70Au30 alloy with varying temperatures has been investigated. The liquid alloy experiences a sudden structure change nearby 1150°C, which has been further thermodynamically confirmed by Differential Scanning Calorimetry (DSC). Small pre-peaks have been found in the structure factor (S(Q)) curves, indicating the stable medium range order (MRO) structure in the melt. As the temperature decreases from 1100°C to 1000°C, MRO structure gets more pronounced. Compared with the structures of Ag90Au10, Transmission Electron Microscope (TEM) results reveal that Ag70Au30 alloy possesses much finer grains. It is concluded that there are strong correlations between melt and solid in Ag70Au30 alloy, and MRO structure in the liquid favors refined solid microstructure.
Keywords :
X-ray diffraction; differential scanning calorimetry; gold alloys; grain refinement; high-temperature effects; liquid alloys; liquid structure; melting; silver alloys; solidification; transmission electron microscopy; Ag70Au30; DSC; TEM; differential scanning calorimetry; grain refinement; high temperature X-ray diffraction; liquid alloy; melt structure; solid alloy; solid microstructure; solidification; structural correlations; structure factor curves; temperature 1100 degC to 1000 degC; transmission electron microscopy; Diffraction; Gold; Solids; Temperature; Temperature dependence; Temperature measurement; MRO structure; X-ray diffraction; liquid/solid structure; structural correlation;
Conference_Titel :
Mechanic Automation and Control Engineering (MACE), 2011 Second International Conference on
Conference_Location :
Hohhot
Print_ISBN :
978-1-4244-9436-1
DOI :
10.1109/MACE.2011.5987266
