Method of synthesizing metal -based composite material by melt reaction in coupling magnetic field and ultrasonic field

Abstract

A method of synthesizing metal matrix composite material by melt reaction in coupling magnetic field and ultrasonic field comprises: adjusting metal-base melt to the onset reaction temperature after refining, then adding reactants which generate reinforced particles by in-situ synthesis reaction with melt, keeping the reacted melt stand until it is cooled to casting temperature after the reaction, and then casting. Magnetic field and high-energy ultrasonic field are exerted simultaneously during the reaction. The magnetic field can be high-power pulse magnetic filed, high-frequency oscillating magnetic field or low-frequency alternating magnetic field. The metal matrix composite material produced by the above-mentioned method exhibits that reinforced particles are much finer, more uniformly distributed, and fit with metal matrix better.

1 - 7 . (canceled) 
     
     
         8 . A method of synthesizing metal matrix in-situ composite material by coupling a magnetic field and an ultrasonic field, comprising the steps of:
 a) adjusting a metal-base melt to an onset reaction temperature after refining;   b) adding reactants which generate a particle phase by an in-situ synthesis reaction with the metal base melt;   c) allowing the reacted metal-base melt to stand until it is cooled to a proper casting temperature after the in-situ synthesis reaction; and   d) casting the metal-base melt; wherein by simultaneously exerting the magnetic field and the ultrasonic field during the reaction to realize synthesizing an in situ particle reinforced metal matrix composite material by coupling the magnetic field and the ultrasonic field.   
     
     
         9 . The method of preparing metal matrix in-situ composite material by coupling a magnetic field and an ultrasonic field according to  claim 8 , wherein the magnetic field and the ultrasonic field are simultaneously exerted during the reaction in a manner of:
 a) preparing the composite material melt in a bath made of thermal-insulating refractory material;   b) inserting a high-energy ultrasonic amplitude transformer into the upper part of the bath ;   c) carrying out the ultrasonic treatment to the melt; and   d) exerting the magnetic field on the outer side of the bath .   
     
     
         10 . The method of preparing metal matrix composite material by coupling a magnetic field and an ultrasonic field according to  claim 9 , wherein further steps comprise:
 a) adjusting the metal-base melt to the onset reaction temperature after refining;   b) adding a reactant powder which generates a reinforced particle phase by an in-situ synthesis reaction with the metal base melt;   c) turning on the magnetic field;   d) inserting the ultrasonic amplitude transformer below the reinforced particle phase liquid level about 5-6 mm after the magnetic field is stable,   e) turning on an ultrasonic device;   f) treating the reinforced particle phase ultrasonically for approximately 60 s-600 s;   g) turning off the ultrasonic device after the appropriate amount of time,   h) turning off the magnetic field;   i) allowing the metal-base melt to stand until it is cooled to the casting temperature; and   j) casting the metal-base melt.   
     
     
         11 . The method of preparing metal matrix in-situ composite material by coupling a magnetic field and an ultrasonic field according to  claim 8 , wherein, the magnetic field can be a high-power pulse magnetic filed, a high-frequency oscillating magnetic field or a low-frequency alternating magnetic field. 
     
     
         12 . The method of preparing metal matrix composite material by coupling a magnetic field and an ultrasonic field according to  claim 11 , wherein the composite material is prepared by coupling the high-power pulse magnetic field and the high-energy ultrasonic field, under a range of electromagnetic parameters of the high-power pulse magnetic field as follows:
 a) a pulse current frequency approximately 0.1 Hz-10 Hz;   b) a pulse current density approximately 1 KA/m 2 -10 KA/m 2 ;   c) a charging voltage approximately 1 kV-20 kV;   d) a central magnetic field intensity of a coil approximately 0.5-20 T; and a range of electromagnetic parameters of the high-energy ultrasonic field are as follows:   a) a frequency approximately 10 kHz-30 kHz, and   b) an intensity approximately 0.5 kW/m 2 -60 kW/m 2 .   
     
     
         13 . The method of preparing metal matrix composite material by coupling a magnetic field and an ultrasonic field according to  claim 11 , wherein the composite material is prepared by coupling the high-frequency oscillating magnetic field and the high-energy ultrasonic field under a range of electromagnetic parameters of the high-frequency oscillating magnetic field is as follows:
 a) a high-frequency reference wave frequency approximately 10 kHz-30 kHz;   b) an amplitude modulation oscillating wave frequency approximately 1 Hz-30 Hz;   c) a power range approximately 0-100 kW; and a range of electromagnetic parameters of the high-energy ultrasonic field as follows:   a) a frequency approximately 10 kHz-30 kHz; and   b) an intensity approximately 0.5 kW/m 2 -60 kW/m 2 .   
     
     
         14 . The method of preparing metal matrix composite material in coupling a magnetic field and an ultrasonic field according to  claim 11 , wherein the composite material is prepared by coupling the low-frequency alternating magnetic field and the high-energy ultrasonic field, under a range of electromagnetic parameters of the low-frequency alternating magnetic field as follows:
 a) a frequency of approximately 0.1 Hz-60 Hz,   b) a working current of approximately 1 A-10000 A; and a range of electromagnetic parameters of the high-energy ultrasonic field as follows:   a) a frequency of approximately 10 kHz-30 kHz; and   b) an intensity of approximately 0.5 kW/m 2 -60 kW/m 2 .