US2012087823A1PendingUtilityA1

Method for producing porous metal sintered molded bodies

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Assignee: JOSHI KETANPriority: Jun 2, 2009Filed: Jun 1, 2010Published: Apr 12, 2012
Est. expiryJun 2, 2029(~2.9 yrs left)· nominal 20-yr term from priority
Inventors:Ketan JoshiIngo BellinJan Kurt WalterNorbert WagnerKlaus HahnChristoffer KieburgJulien CourtoisAlexander Traut
B22F 3/1125B22F 3/11C08J 9/0066C08J 9/232C08J 2203/14C08J 9/00
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Claims

Abstract

The invention relates to a method for producing porous metal sintered molded bodies, wherein expandable polymer particles, in which a sinterable metal powder is dispersed, are expanded to form a molded body. The molded body is subjected to a heat treatment, wherein the polymer is expelled and the sinterable metal powder is sintered to form a porous metal sintered molded body. Preferably, styrol polymers are used. The sinterable metal powder is selected, for example, from aluminum, iron, copper, nickel, and titanium.

Claims

exact text as granted — not AI-modified
1 - 14 . (canceled) 
     
     
         15 . A process for producing porous sintered shaped metal bodies, wherein expandable polymer particles in which a sinterable metal powder is dispersed are foamed to form a shaped body and the shaped body is subjected to a heat treatment in which the polymer is driven off and the sinterable metal powder sinters to give a porous sintered shaped metal body. 
     
     
         16 . The process according to  claim 15 , wherein the expandable polymer particles are introduced into a mold and foamed. 
     
     
         17 . The process according to  claim 16 , wherein the expandable polymer particles are prefoamed before introduction into the mold. 
     
     
         18 . The process according to  claim 15 , wherein the proportion by weight of the dispersed sinterable metal powder, based on the total weight of polymer and sinterable metal powder, is from 60 to 95% by weight. 
     
     
         19 . The process according to  claim 15 , wherein the expandable polymer particles comprise a physical blowing agent. 
     
     
         20 . The process according to  claim 19 , wherein the expandable polymer particles are obtained by impregnating polymer particles in which the sinterable metal powder is dispersed with a blowing agent. 
     
     
         21 . The process according to  claim 19 , wherein the blowing agent is an aliphatic hydrocarbon or a halogenated hydrocarbon. 
     
     
         22 . The process according to  claim 21 , wherein the blowing agent is pentane. 
     
     
         23 . The process according to  claim 15 , wherein the polymer is a polymer or copolymer of styrene. 
     
     
         24 . The process according to  claim 15 , wherein the sinterable metal powder has an average particle size of from 0.1 to 80 μm 
     
     
         25 . The process according to  claim 15 , wherein the sinterable metal powder is aluminum, iron, copper, nickel or titanium. 
     
     
         26 . The process according to  claim 15 , wherein the sinterable metal powder is carbonyl iron powder. 
     
     
         27 . The process according to  claim 15 , wherein the expandable polymer particles are essentially spherical. 
     
     
         28 . The process according to  claim 15 , wherein the expandable polymer particles have a diameter of from 0.5 to 30 mm

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