Method for combining components made of different materials

Abstract

A method for combining two components together includes the following steps: a) surface treating the two components; b) placing them within a heating apparatus while they contact with each other, a force being applied to the two components to push then against each other on the contacting surfaces thereof; c) heating the two components to a predetermined temperature which is hold for a predetermined period time to cause the two components to diffuse at the contacting interface to thereby combine the two components together; d) cooling the combined two components and taking them out of the heating apparatus.

1 . A method for combining two components each having a predetermined combining surface, the method comprising the following steps: 
 a) surface treating the predetermined combining surfaces to smooth them;    b) placing the two components with treated combining surfaces within a heating apparatus with the treated combining surfaces contacting with each other;    c) heating the two components at a predetermined temperature for a predetermined period time to cause atoms of the two components to diffuse to each other to form a layer of alloy at an interface of the two components to thereby combine the two components together;    d) cooling the combined two components and taking them out of the heating apparatus.    
   
   
       2 . The method as described in  claim 1 , wherein one of the two components is made of one of Al, the other of the two components is made of Cu, and the alloy is Al 3 Cu 2 .  
   
   
       3 . The method as described in  claim 2 , wherein at the step b) a pair of forces is applied to the two components to induce a pressure stress at each of the combining surfaces.  
   
   
       4 . The method as described in  claim 1 , wherein the predetermined temperature is in the range of 350-420° C.  
   
   
       5 . The method as described in  claim 4 , wherein the predetermined temperature is in the range of 350-370° C.  
   
   
       6 . The method as described in  claim 5 , wherein the predetermined temperature is about 360° C.  
   
   
       7 . The method as described in  claim 1 , wherein the predetermined time is in the range of 2-3 hours.  
   
   
       8 . The method as described in  claim 7 , wherein the predetermined time is about 3 hours.  
   
   
       9 . The method as described in  claim 1 , wherein the oven is filled with a mixture of N 2  and H 2  for preventing the two component from oxidization due to heating.  
   
   
       10 . A product comprising first and second components made of two different metals, respectively, and an alloy of made from diffusion of the two metals and formed at an interface of the two components to combine the two components together.  
   
   
       11 . The product as described in  claim 10 , wherein one of the two components is made of Al, the other of the two components is made of Cu, and the alloy is Al 3 Cu 2 .  
   
   
       12 . A method for combining two components together which are made of copper and aluminum, respectively, comprising the following steps: 
 a) placing the two components in an oven while the two components are subjected to a pair of forces pushing them against each other at a combining interface of the two components;    b) heating the two components with a predetermined temperature for a predetermined period of time until a diffusion of the two components occurs at the combining interface to form an alloy of the two components so that the two components are combined together by the alloy; and    c) cooling the combined two components.    
   
   
       13 . The method of  claim 12  further comprising the following step before step a): 
 surface treating the two components to reduce roughness thereof.    
   
   
       14 . The method of  claim 13 , wherein the surface treating step further comprises removing oil and oxide from the two components.  
   
   
       15 . The method of  claim 12 , wherein the forces applied on the two components induces a stress of 30 Mpa at the combining interface.  
   
   
       16 . The method of  claim 12 , wherein the two components are heated with a temperature of about 350° C.-420° C. for a period of time of about 2-3 hours.  
   
   
       17 . The method of  claim 12 , where the oven is filled with a mixture of N 2  and H 2 .  
   
   
       18 . The method of  claim 16 , wherein the two components are heated with a temperature of about 360° C. for a period of time of about 3 hours.  
   
   
       19 . The method of  claim 18 , wherein the oven is filled with a mixture of N 2  and H 2 .