Method for producing multiphase particle-reinforced metal matrix composites

Abstract

A method for producing multiphase particle-reinforced metal matrix composites is provided. The method is characterized by the combination of an in-situ reaction process under an external electromagnetic field and an in-situ crystallization process under an external electromagnetic field. A traveling wave magnetic field or a rotating magnetic field is employed during the in-situ reaction process, and a rotating magnetic field or a high frequency magnetic field is employed during the in-situ crystallization process. Said method can obtain homogeneous, gradient enhanced or surface reinforced composite materials.

1 - 9 . (canceled) 
     
     
         10 . A method for preparing multiphase particle-reinforced metal matrix composites, the method comprising:
 utilizing in-situ reaction generated particles and in-situ crystallization generated particles as a reinforcement of the multiphase particle-reinforced metal matrix composites;   controlling the in-situ reaction generated particles with a first electromagnetic field; and   controlling the in-situ crystallization generated particles with a second electromagnetic field.   
     
     
         11 . The method of  claim 10 , wherein the first electromagnetic field is at least one of a traveling wave magnetic field and a rotating magnetic field. 
     
     
         12 . The method of  claim 10 , wherein the second electromagnetic field is at least one of a rotating magnetic field and a high frequency magnetic field. 
     
     
         13 . The method of  claim 10 , further comprising at least one of a homogeneous, gradient enhanced, or surface reinforced composite material. 
     
     
         14 . The method of  claim 11 , wherein a plurality of electromagnetic parameters of at least one of the traveling wave magnetic field and rotating electromagnetic stirring field have a frequency of 1˜50 Hz, a working current: 1-1000 A, and a magnetic strength of a melt centre controlled at 0.001˜1 T, wherein the electromagnetic parameters are adjusted according to a stirring intensity of the melt. 
     
     
         15 . The method of  claim 14 , wherein the magnetic strength of the melt centre is controlled at 0.02˜0.1 T. 
     
     
         16 . The method  12 , wherein a plurality of electromagnetic parameters of the rotating magnetic field include a frequency of 1˜50 Hz, a working current: 1-1000 A, and a magnetic strength of a melt centre controlled at 0.001˜1 T, wherein the electromagnetic parameters are adjusted according to a stirring intensity of the melt in the crystallizer. 
     
     
         17 . The method of  claim 16 , wherein the magnetic strength at the melt centre in the crystallizer is controlled in a range of 0.02˜0.1 T. 
     
     
         18 . The method of  claim 12 , wherein a frequency range of the high frequency magnetic field is 1 kHz˜30 kHz, a power range is 0˜100 kW, and a magnetic strength range in an unloaded crystallizer is controlled in a range of 0.005˜1 T. 
     
     
         19 . The method of  claim 18 , wherein the magnetic strength range in the unloaded crystallizer is controlled in the range of 0.1˜0.5 T.