Microstructure and mechanical properties of an Al-11La-6Mg alloy prepared by the melt spinning and spark plasma sintering

In order to refine the precipitate and grain, the combination of melt spinning and spark plasma sintering were used to prepare Al-11La-6Mg alloy. The results show that melt spun ribbon consists of some coarse precipitates. After spark plasma sintering, there are dual-scale precipitates in the matrix. As a result, the alloy exhibits a high compressive strength of 933 MPa and strain of 34% at room temperature. Unfortunately, the strength, at 300°C, is inferior to as-cast sample due to the fine grain.