System and method for fabrication of bulk nanocrystal alloy

Abstract

A system and a method for fabrication of bulk nanocrystal alloys is provided. The method may include subjecting powders of at least one material to an ultrasonic vibration at a first amplitude. The method may also include heating the powders in response to the ultrasonic vibration at a first temperature elevating rate corresponding to the first amplitude, and treating the powders in a temperature range corresponding to the first temperature elevating rate. The method may further include obtaining a bulk material composed of a plurality of crystal grains, the plurality of crystal grains having an average linear dimension equal to or larger than 10 nm. The method may further include obtaining a bulk material with amorphous structure with sufficient temperature cooling rate.

1 . A method for fabrication of bulk nanocrystal alloy comprising:
 subjecting powders of at least one material to an ultrasonic vibration at a first amplitude;   heating the powders in response to the ultrasonic vibration at a first temperature elevating rate corresponding to the first amplitude;   treating the powders in a temperature range corresponding to the first temperature elevating rate, wherein the temperature range includes a first temperature configured to be above a characteristic temperature of the at least one material; and   obtaining a bulk material composed of a plurality of crystal grains, the plurality of crystal grains having an average linear dimension equal to or larger than 10 nm.   
     
     
         2 . The method of  claim 1 , wherein the powders are amorphous. 
     
     
         3 . The method of  claim 2 , wherein the powders of at least one material include at least one of polymer powders, metal powders, alloy powders, or ceramic powders. 
     
     
         4 . The method of  claim 2 , wherein the characteristic temperature is a crystallization temperature of the at least one material. 
     
     
         5 . The method of  claim 1 , wherein the average linear dimension of the crystal grains is determined based on the first temperature elevating rate and the first temperature. 
     
     
         6 . The method of  claim 5 , wherein the average linear dimension of the plurality of crystal grains is further determined based on a time duration of the treatment of the powders in the temperature range, a stress imposed on the powders, or a linear dimension of a powder particle corresponding to each of the plurality of crystal grains. 
     
     
         7 . The method of  claim 1 , wherein the ultrasonic vibration is in a frequency range from 10 kHz to 100 kHz. 
     
     
         8 . The method of  claim 1 , further comprising providing the powders in a mold, wherein a shape of the bulk material is determined by a shape of the mold. 
     
     
         9 . A method for fabrication of bulk nanocrystal alloy comprising:
 subjecting powders of at least on material to an ultrasonic vibration at a first amplitude;   heating the powders in response to the ultrasonic vibration at a first temperature elevating rate corresponding to the first amplitude;   treating the powders in a temperature range corresponding to the first temperature elevating rate, wherein the temperature range includes a first temperature configured to be between a first characteristic temperature of the at least one material and a second characteristic temperature of the at least one material; and   obtaining a bulk material at a first temperature cooling rate, wherein the bulk material is in an amorphous state.   
     
     
         10 . The method of the  claim 9 , wherein the powders are amorphous. 
     
     
         11 . The method of the  claim 10 , wherein the powders of at least one material include at least one of polymer powders, metal powders, alloy powders, or ceramic powders. 
     
     
         12 . The method of the  claim 9 , wherein the first characteristic temperature is a glass transition temperature of the at least one material. 
     
     
         13 . The method of the  claim 12 , wherein the second characteristic temperature is a crystallization temperature of the at least one material. 
     
     
         14 . The method of the  claim 12 , wherein the second characteristic temperature is a melting temperature of the at least one material. 
     
     
         15 . (canceled) 
     
     
         16 . (canceled) 
     
     
         17 . The method of the  claim 9 , wherein the amorphous state of the bulk material is further determined based on a time duration of the treatment of the powders in the temperature range, a stress imposed on the powders, or a linear dimension of a powder particle. 
     
     
         18 . A system for fabrication of bulk nanocrystal alloy comprising:
 an ultrasonic generator configured to generate an electric signal;   a transducer configured to generate an ultrasonic vibration at a first amplitude based on the electric signal; and   an indenter configured to heat powders of at least one material in response to the ultrasonic vibration at a first temperature elevating rate corresponding to the first amplitude, and treat the powders in a temperature range corresponding to the first temperature elevating rate, wherein the temperature range includes a first temperature configured to be above a first characteristic temperature of the at least one material.   
     
     
         19 . The system of  claim 18 , wherein the at least one characteristic temperature of the at least one material includes a glass transition temperature, a crystallization temperature, or a melting temperature. 
     
     
         20 . The system of  claim 18 , wherein the powders are amorphous or crystalline. 
     
     
         21 . The system of  claim 18 , wherein the powders of at least one material include at least one of polymer powders, metal powders, alloy powders, or ceramic powders. 
     
     
         22 . (canceled) 
     
     
         23 . The system of the  claim 18 , further comprising a mold configured to place the powders of the at least one material.