Phase transformations induced by mechanical alloying of Ag-28 at.-%Al alloy

作者：Esquivel Gonzalez R^*; Dorantes Rosales H J; Lopez Hirata V M; Gonzalez Velazquez J L; Contreras Piedras E; Saucedo Munoz M L; Hernandez Santiago F

来源：Materials Science and Technology, 2010, 26(1): 53-57.

DOI：10.1179/174328408X389760

• Phase transformation
• Intermetallics
• Mechanical alloying
• Milling parameters
• Ag-Al alloys

Published by Maney Publishing (c) IOM Communications Ltd A Ag-28 at.-%Al alloy was obtained by mechanical alloying in a SPEX 8000D mill from elemental Ag and Al powders. Two vials with different internal volume and two ball powder weight ratios were used to analyse the phase evolution. Microstructural characterisation was carried out by Xray diffraction, SEM and TEM. The sequence of phase transformation during the milling process was as follows: Ag+Al (powders)->alpha ->alpha+zeta ->alpha+zeta+mu ->mu+zeta ->mu. The formation of the alpha and zeta phases is favoured by the energy of the impacts in the early stage of milling, while the formation kinetics rate of the mu phase was faster for the higher vial volume and ball/powder weight ratio. TEM images confirm the presence of the mu phase with a nanometric grain size.

• 出版日期2010-1