Magnesium alloy

Abstract

The present invention relates to creep resistant magnesium alloys. The magnesium alloy includes aluminum in an amount by mass of 5 to 20 percent, nanoparticles in an amount by mass of 0.1 to 10 percent, and the remainder being magnesium and unavoidable impurities. The nanoparticles contain Y2O3 in an amount by mass of 5 to 15 percent, ZrO2 in an amount by mass of 85 to 95 percent. The sizes of nanoparticles are in the range from 5 nm to 200 nm. The present magnesium alloys have higher creep resistance compared with conventional magnesium alloys, such as AE42 alloy.

1 . A magnesium alloy comprising: 
 aluminum in an amount by mass of 5 to 20 percent;    nanoparticles in an amount by mass of 0.1 to 10 percent;    remainder being magnesium; and    unavoidable impurities; wherein    the nanoparticles contains Y2O3 in an amount by mass of 5 to 15 percent, Al2O3 in an amount by mass of 3 to 8 percent, AlN in an amount by mass of 1 to 3 percent, with the remainder being ZrO2.    
   
   
       2 . The magnesium alloy as claimed in  claim 1 , wherein the nanoparticles are in an amount by mass of 0.5 to 2 percent.  
   
   
       3 . The magnesium alloy as claimed in  claim 1 , wherein the remainder further containing strontium in an amount by mass of 0.3 to 1.5 percent.  
   
   
       4 . The magnesium alloy as claimed in  claim 1 , wherein the sizes of nanoparticles are in the range from 5 nm to 200 nm.  
   
   
       5 . The magnesium alloy as claimed in  claim 4 , wherein the preferred sizes of nanoparticles are in the range from 10 nm to 100 nm.  
   
   
       6 . A magnesium alloy comprising: 
 aluminum in an amount by mass of 5 to 20 percent;    nanoparticles in an amount by mass of 0.1 to 10 percent;    remainder being magnesium, and    unavoidable impurities; wherein    the nanoparticles contains Y2O3 in an amount by mass of 5 to 15 percent, Al2O3 in an amount by mass of 3 to 8 percent, and ZrO2 in an amount by mass of 77 to 92 percent.    
   
   
       7 . The magnesium alloy as claimed in  claim 6 , wherein the nanoparticles are in an amount by mass of 0.5 to 2 percent.  
   
   
       8 . The magnesium alloy as claimed in  claim 6 , wherein the remainder further comprises strontium in an amount by mass of 0.3 to 1.5 percent.  
   
   
       9 . The magnesium alloy as claimed in  claim 6 , wherein the sizes of nanoparticles are in the range from 5 nm to 200 nm.  
   
   
       10 . The magnesium alloy as claimed in  claim 9 , wherein the preferred sizes of nanoparticles are in the range from 10 nm to 100 nm.  
   
   
       11 . A magnesium alloy comprising: 
 aluminum in an amount by mass of 5 to 20 percent;    nanoparticles in an amount by mass of 0.1 to 10 percent;    reminder being magnesium and    unavoidable impurities; wherein    the nanoparticles contains Y2O3 in an amount by mass of 5 to 15 percent, and ZrO2 in an amount by mass of 85 to 95 percent.    
   
   
       12 . The magnesium alloy as claimed in  claim 11 , wherein the nanoparticles are in an amount by mass of 0.5 to 2 percent.  
   
   
       13 . The magnesium alloy as claimed in  claim 11 , wherein the reminder further comprises strontium in an amount by mass of 0.3 to 1.5 percent.  
   
   
       14 . The magnesium alloy as claimed in  claim 11 , wherein the sizes of nanoparticles are in the range from 5 nm to 200 nm.  
   
   
       15 . The magnesium alloy as claimed in  claim 14 , wherein the preferred sizes of nanoparticles are in the range from 10 nm to 100 nm.