Ti/tic composite, production method and use thereof

Abstract

The present invention provides a Ti material extremely high in mechanical strength. A Ti/TiC composite, wherein no simple substance of carbon essentially exists in a TiC, and wherein 0.3 mass % or more of oxygen is solidified in the composite. A Ti/TiC composite has an upper yield point in a relation between a tensile strength and an elongation.

What is claimed is: 
     
         1 . A Ti/TiC composite,
 wherein no simple substance of carbon essentially exists in a TiC, and   wherein 0.3 mass % or more of oxygen is solidified in the composite.   
     
     
         2 . The Ti/TiC composite as recited in  claim 1 , wherein 0.04 mass % or more of nitrogen is solidified in the composite. 
     
     
         3 . The Ti/TiC composite as recited in  claim 1 , wherein TiC is dispersed in a Ti matrix and no carbon is precipitated in the Ti matrix. 
     
     
         4 . The Ti/TiC composite as recited in  claim 1 , wherein a size of the TiC is 0.5 to 5 μm. 
     
     
         5 . The Ti/TiC composite as recited in  claim 1 , wherein a crystal grain size of the Ti is 3 to 10 μm. 
     
     
         6 . The Ti/TiC composite as recited in  claim 1 , wherein a crystal grain texture has no preferred orientation and an orientation difference of each crystal grain is 15° or more. 
     
     
         7 . The TI/TiC composite as recited in  claim 1 , wherein the Ti/Ti composite has an upper yield point in a relation between a tensile strength and an elongation. 
     
     
         8 . The Ti/TiC composite as recited in  claim 1 , wherein the Ti/TiC composite contains one or more metals selected from the group consisting of Fe, Co, Ni, Sc, V, Cr, Mn, Cu, Y, Zr, Nb, W, Mo, Mg, Al, and Si. 
     
     
         9 . A Ti/TiC composite having an upper yield point in a relation between a tensile strength and an elongation. 
     
     
         10 . A production method of a Ti/TiC composite, comprising:
 alloying by giving mechanical energy and/or thermal energy to a mixture of pure titanium powder and carbon and solidifying oxygen and nitrogen; and thereafter sintering it.   
     
     
         11 . The production method of a Ti/TiC composite as recited in  claim 10 , wherein the carbon is a carbon fiber. 
     
     
         12 . The production method of a Ti/TiC composite as recited in  claim 11 , wherein the carbon fiber is a carbon fiber obtained by a vapor phase growth method. 
     
     
         13 . The production method of a Ti/TiC composite as recited in  claim 11 , wherein a fiber diameter of the carbon fiber of 90% or more is 50 to 300 nm in a fiber diameter distribution of a number standard of the carbon fiber. 
     
     
         14 . The production method of a Ti/TiC composite as recited in  claim 10 , wherein the Ti/TiC composite obtained by sintering reaction is hot extruded. 
     
     
         15 . A production equipment using the Ti/TiC composition as recited in  claim 1 . 
     
     
         16 . An engine equipment using the Ti/TiC composition as recited in  claim 1 . 
     
     
         17 . A heat exchange facility using the Ti/TiC composition as recited in  claim 1 . 
     
     
         18 . A building using the Ti/TiC composition as recited in  claim 1 . 
     
     
         19 . An automotive using the Ti/TiC composition as recited in  claim 1 . 
     
     
         20 . An airplane using the Ti/TiC composition as recited in  claim 1 .