Heat resistant magnesium alloy

Abstract

A heat resistant magnesium alloy contains 1 to 6 percentage by mass of aluminum, 0.5 to 3 by mass ratio of calcium to aluminum, and the remainder made from magnesium and unavoidable impurities.

What is claimed is:  
     
         1 . A heat resistant magnesium alloy comprising: 
 aluminum in an amount by weight of about 1 to about 6 percent;    calcium in an amount such that the weight ratio of calcium to aluminum is from about 0.5 to about 3; and    the remainder magnesium and unavoidable impurities.    
     
     
         2 . The heat resistant magnesium alloy of  claim 1 , wherein aluminum is present in an amount by weight of about 2 to about 4 percent.  
     
     
         3 . The heat resistant magnesium alloy of  claim 1 , wherein calcium is present in an amount such that the weight ratio of calcium to aluminum is from about 1 to about 2.  
     
     
         4 . The heat resisting magnesium alloy of  claim 1  further comprising manganese in an amount by weight of about 0.2 to about 1 percent.  
     
     
         5 . The heat resistant magnesium alloy of  claim 4 , wherein the manganese is present in an amount by weight of about 0.5 to about 0.7 percent.