Green metal composite material

Abstract

The invention provides a green metal composite material, which is prepared by the following method: Provide Mg, Mo, Al, Ni, and Ti powders; weigh the Mg, Mo, Al, Ni, and Ti powders; and perform the first ball milling on the Mg, Mo, Al, Ni, and Ti powders; perform vacuum melting to obtain a Mg-based alloy ingots; crush the Mg-based alloy ingots; provide carbon nano tubes and graphene powders; and perform surface modification; mix well the crushed Mg-based alloy ingots and the surface modified carbon nano tubes and the graphene powders, and perform a second ball milling to obtain a second mixed powder; then perform a first heat treatment to obtain a third mixed powder, then perform a second hot pressed sintering. The process technology of this invention solves the problems of poor compatibility, easy to be segregated and unstable property of the non-metallic particles and metallic matrix.

1 . A green metal composite material, characterized in that: the green metal composite material mentioned in this patent is prepared by the following method:
 Provide Mg, Mo, Al, Ni, and Ti powders;   Weigh the Mg, Mo, Al, Ni, and Ti powders according to a predetermined chemical formula;   Perform a first ball milling on the Mg, Mo, Al, Ni, and Ti powders after weighing to obtain a first mixed powder,   Perform vacuum melting on the first mixed powder to obtain a Mg-based alloy ingots;   Crush the Mg-based alloy ingots;   Provide carbon nano tubes and graphene powders;   Perform surface modification on the mentioned carbon nano tubes and graphene powders;   Mix well the crushed Mg-based alloy ingots and the surface modified carbon nano tubes and the graphene powders, and perform a second ball milling on the mixture to obtain a second mixed powder;   Perform a first heat treatment on the second mixed powder to obtain a third mixed powder;   Perform a second hot pressed sintering on the third mixed powder.   
     
     
         2 . The green metal composite material mentioned in  claim 1 , characterized in that: the predetermined chemical formula mentioned in  claim 1  is Mg100-x-y-z-aMoxAlyNizTia, wherein x=0.5-1.5, y=2-3, z=10-12, a=1-3. 
     
     
         3 . The green metal composite material mentioned in  claim 1 , characterized in that: perform a first ball milling on the Mg, Mo, Al, Ni, and Ti powders after weighing, and the specific methods are as follows: the ball milling atmosphere is argon atmosphere, the ball milling speed is 1500-1800 r/min, the ball milling time is 10-20 h, the ratio of ball to material is 8:1-9:1, in the ball milling process, each ball milling lasts 60-70 min, and suspend the ball milling for 4-5 min, the temperature in the ball milling tank is controlled to be lower than 600° C. during the ball milling process. 
     
     
         4 . The green metal composite material mentioned in  claim 1 , characterized in that: specifically, the vacuum melting performed on the first mixed powder is as follows: the vacuum degree is less than 0.01 Pa, the smelting time is 80-100 min, and the alloy ingots are flipped once every 200-250 s during the smelting process. 
     
     
         5 . The green metal composite material mentioned in  claim 1 , characterized in that: specifically, the surface modification performed on the mentioned carbon nano tubes and graphene powders is as follows: prepare the silane coupling agent organic solvent, wherein the weight percentage of silane coupling agent is 2-3 wt %; place the carbon nano tubes and graphene powders into the organic solution of the silane coupling agent, and stir, the stirring time is 50-70 min, and the stirring temperature is 70-80° C. 
     
     
         6 . The green metal composite material mentioned in  claim 1 , characterized in that: specifically, the second ball milling is as follows: the ball milling atmosphere is argon atmosphere, the ball milling speed is 500-600 r/min, the ball milling time is 5-8 h, the ratio of ball to material is 4:1-5:1, in the ball milling process, each ball milling lasts 30-40 min, and suspend the ball milling for 4-5 min, the temperature in the ball milling tank is controlled to be lower than 300° C. during the ball milling process. 
     
     
         7 . The green metal composite material mentioned in  claim 1 , characterized in that: in the second mixture powder, Mg-based alloy ingots account for 100-120 parts by weight after being crushed, surface modified carbon nano tubes account for 10-20 parts, and surface modified graphene powders account for 3-5 parts. 
     
     
         8 . The green metal composite material mentioned in  claim 1 , characterized in that: the first heat treatment performed on the second mixed powder is as follows: the heat treatment atmosphere is hydrogen atmosphere, the heat treatment temperature is 600-650° C., the heat treatment time is 10-20 min, and the heating rate is 10-20° C./min. 
     
     
         9 . The green metal composite material mentioned in  claim 1 , characterized in that: a second hot pressed sintering performed on the third mixed powder is as follows: the hot pressing pressure is lower than 0.03 Pa, the hot pressing temperature is 700-780° C., the hot pressing pressure is 5-10 MPa, and the hot pressing time is 5-10 min.