Mg alloy, method for manufacturing mg alloy, and construction material and biomaterial using mg alloy

Abstract

An Mg alloy is provided the degradation of which is promoted by forming and crystallizing an Al—Mn—Ni system intermetallic compound containing Ni together with the metals included in a magnesium alloy, and thereby dispersing Ni in the magnesium alloy.

1 . A Mg alloy containing Mg, Al, Mn, and Ni, and having a crystallized Al—Mn—Ni system intermetallic compound. 
     
     
         2 . The Mg alloy according to  claim 1 , further containing Zn. 
     
     
         3 . The Mg alloy according to  claim 1 , further containing Ca. 
     
     
         4 . The Mg alloy according to  claim 3 , comprising one or more compounds selected from a group consisting of Al 2 Ca, (Mg, Al) 2 Ca, and Mg 2 Ca. 
     
     
         5 . The Mg alloy according to  claim 1 , wherein the Al is in an amount of 0.1 mass % or more, and the Mn is in an amount of 0.05 mass % or more based on a total amount of the Mg alloy. 
     
     
         6 . The Mg alloy according to  claim 2 , wherein the Zn is in an amount of 0.05 mass % or more and 1.5 mass % or less based on a total amount of the Mg alloy. 
     
     
         7 . The Mg alloy according to  claim 3 , wherein the Ca is in an amount of 0.1 mass % or more and 2.0 mass % or less based on a total amount of the Mg alloy. 
     
     
         8 . The Mg alloy according to  claim 1 , wherein Ni is in an amount of 0.1 mass % or more based on an amount of the Al—Mn—Ni system intermetallic compound. 
     
     
         9 . The Mg alloy according to  claim 1 , wherein the Al—Mn—Ni system intermetallic compounds are present at one compound/cm 2  or more per unit sectional area, and has a size of 1 nm or more and 25 μm or less. 
     
     
         10 . (canceled) 
     
     
         11 . A method for manufacturing an Mg alloy having a crystallized Al—Mn—Ni system intermetallic compound, the method comprising casting, including:
 a step of producing a mixture by blending Mg, Al, Mn, and Ni; 
 a step of producing a molten metal by heating the produced mixture to 720° C. or more; 
 a step of producing a completely molten metal by stirring the produced molten metal; and 
 a step of casting the completely molten metal produced by stirring. 
 
     
     
         12 . The method for manufacturing an Mg alloy according to  claim 11 , wherein the step of producing the mixture further includes a step of blending Zn and/or Ca. 
     
     
         13 . A construction material or a biomaterial each using the Mg alloy according to  claim 1 , wherein collection after use is unnecessary due to degradability of the Mg alloy. 
     
     
         14 . A construction material or a biomaterial each manufactured by the method for manufacturing an Mg alloy according to  claim 11 , wherein collection after use is unnecessary due to degradability of the Mg alloy. 
     
     
         15 . The Mg alloy according to  claim 2 , further containing Ca. 
     
     
         16 . The Mg alloy according to  claim 15 , comprising one or more compounds selected from the group consisting of Al 2 Ca, (Mg, Al) 2 Ca, and Mg 2 Ca. 
     
     
         17 . The Mg alloy according to  claim 2 , wherein the Al is in an amount of 0.1 mass % or more, and the Mn is in an amount of 0.05 mass % or more based on a total amount of the Mg alloy. 
     
     
         18 . The Mg alloy according to  claim 3 , wherein the Al is in an amount of 0.1 mass % or more, and the Mn is in an amount of 0.05 mass % or more based on a total amount of the Mg alloy. 
     
     
         19 . The Mg alloy according to  claim 15 , wherein the Al is in an amount of 0.1 mass % or more, and the Mn is in an amount of 0.05 mass % or more based on a total amount of the Mg alloy. 
     
     
         20 . The Mg alloy according to  claim 15 , wherein the Ca is in an amount of 0.1 mass % or more and 2.0 mass % or less based on a total amount of the Mg alloy. 
     
     
         21 . The Mg alloy according to  claim 2 , wherein Ni is in an amount of 0.1 mass % or more based on the amount of the Al—Mn—Ni system intermetallic compound. 
     
     
         22 . The Mg alloy according to  claim 3 , wherein Ni is in an amount of 0.1 mass % or more based on a amount of the Al—Mn—Ni system intermetallic compound. 
     
     
         23 . The Mg alloy according to  claim 15 , wherein Ni is in an amount of 0.1 mass % or more based on an amount of the Al—Mn—Ni system intermetallic compound.