The application of heat resistant magnesium alloys in automotive and/or aerospace industry has the advantages of energy saving and emission reduction. Si and Ca element are usually used to design heat resistance magnesium due to their low cost and the formation of stable compound when they are combined with Mg element. Therefore it has theoretical and practical significance to research the modification of Mg_2Si phase and the creep properties of Ca-containing heat resistant magnesium alloys. In this paper, ...