Thermal insulation material and production method thereof

Abstract

A thermal insulation material containing an Al—Cu—Fe-based alloy, wherein at least part of the Al—Cu—Fe-based alloy comprises a quasicrystalline phase, wherein the Al—Cu—Fe-based alloy contains one or more transition elements selected from the group of Ru, Rh, Pd, Ag, Os, Jr, Pt, and Au, and wherein the total of the transition elements is from 0.25 to 0.75 atom % when the whole of the Al—Cu—Fe-based alloy is 100 atom %.

1 . A thermal insulation material containing an Al—Cu—Fe-based alloy,
 wherein at least part of the Al—Cu—Fe-based alloy comprises a quasicrystalline phase, 
 wherein the Al—Cu—Fe-based alloy contains one or more transition elements selected from the group consisting of Ru, Rh, Pd, Ag, Os, Ir, Pt, and Au, and 
 wherein the total of the transition elements is from 0.25 to 0.75 atom %, when the whole of the Al—Cu—Fe-based alloy is 100 atom %. 
 
     
     
         2 . The thermal insulation material according to  claim 1 , wherein the Al—Cu—Fe-based alloy has a composition represented by AlaCubFecXd (wherein X is one or more members of the transition elements, 20.0≦b≦28.0, 10.0≦c≦14.0, 0.25≦d≦0.75, and a+b+c+d=100). 
     
     
         3 . The thermal insulation material according to  claim 2 , wherein b is from 23.5 to 26.0 and c is from 11.7 to 13.0. 
     
     
         4 . A method for producing the thermal insulation material according to  claim 1 , comprising:
 weighing and mixing raw material powder, and   heating the mixed raw material powder in a non-oxidizing atmosphere to mutually solid-phase diffuse respective elements contained in the raw material powder,   wherein the raw material powder contain powder of respective metals or alloys of Al, Cu and Fe and powder of metals or alloys of one or more transition elements selected from the group consisting of Ru, Rh, Pd, Ag, Os, Ir, Pt, and Au.   
     
     
         5 . The method according to  claim 4 , wherein the raw material powder contain an Al powder, a Cu powder, an Fe powder, and powder of metals of one or more transition elements selected from the group consisting of Ru, Rh, Pd, Ag, Os, Ir, Pt, and Au. 
     
     
         6 . The method according to,  claim 4  wherein the heating temperature is from 550 to 800° C.