Dear Abdul Rahman;

By adding ca to the mg alloy the intermetallic phase will precipitate along the grain boundary by eutectic reaction, this will strengthen the produced alloy. the process can be conducted by using a vortex stirs casting process with a furnace, reinforcement feeder, a mechanical stirrer, and a pouring set up at the bottom to transfer the molten slurry to mold. In stir casting, the base metal is heated at elevated temperature in an inert atmosphere to avoid the oxidation process. more details in the following references;

file:///C:/Users/USER/Desktop/Microstructureandnano-scalemechanicalbehaviorofMg-AlandMg-Al-CaalloysMater.Sci.Eng.A473200816-27.pdf

Article Development and influence of tribomechanical properties on m...

The development and influence of Magnesium based metal matrices have been reviewed extensively. The methods of development, like stir casting and powder metallurgy, were most commonly used in a majority of works. It is evident that the addition of particles in the micro and nanolevel, especially ceramics, has enhanced the wear and mechanical characteristics of all the metal matrices developed. However, it has to be noted that the research works conducted on ZE41 Magnesium alloy are very less when compared to other alloys of magnesium. So the development of Hybrid metal matrices, which utilizes ZE41 Magnesium as a base matrix in specific applications, can open the doors of research in the composite material field.

Thanks@Safwan al-qawabah