Microwave sintering of hardmetals

Application of microwave radiation as a heat source for sintering of hardmetal is described. Sintering of hardmetal with microwaves leads to a finer microstructure because of lower sintering temperatures and shorter processing times. A further variant is the microwave reaction sintering of a powder...

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Published in:	International journal of refractory metals & hard materials Vol. 16; no. 4; pp. 409 - 416
Main Authors:	Ro¨diger, K., Dreyer, K., Gerdes, T., Willert-Porada, M.
Format:	Journal Article
Language:	English
Published:	Elsevier Ltd 1998
Subjects:	Hardmetal production Hardmetals Microstructure Microwave sintering Reaction sintering WC-platelets Reaction sintering Microwave sintering Microstructure Hardmetal production Hardmetals WC-platelets
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Abstract	Application of microwave radiation as a heat source for sintering of hardmetal is described. Sintering of hardmetal with microwaves leads to a finer microstructure because of lower sintering temperatures and shorter processing times. A further variant is the microwave reaction sintering of a powder mixture of metallic tungsten, carbon and cobalt to obtain finer microstructures than by the conventional route. Moreover, this process offers a great potential for simplifying and shortening the process sequence in hardmetal production. The in-situ formation of WC-platelets during microwave reaction sintering was observed.
AbstractList	Application of microwave radiation as a heat source for sintering of hardmetal is described. Sintering of hardmetal with microwaves leads to a finer microstructure because of lower sintering temperatures and shorter processing times. A further variant is the microwave reaction sintering of a powder mixture of metallic tungsten, carbon and cobalt to obtain finer microstructures than by the conventional route. Moreover, this process offers a great potential for simplifying and shortening the process sequence in hardmetal production. The in-situ formation of WC-platelets during microwave reaction sintering was observed.
Author	Willert-Porada, M. Gerdes, T. Ro¨diger, K. Dreyer, K.
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Copyright	1998 Elsevier Science Ltd. All rights reserved.
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References	Meadows (bib10) 1972 Gerdes, Willert-Porada, Kolaska, Ro¨diger (bib5) 1995; 59 Gerdes, Willert-Porada, Ro¨diger, Dreyer (bib8) 1996; 430 Willert-Porada, Gerdes, Ro¨diger, Kolaska (bib6) 1996 Kolaska H, Ro¨diger K, Willert-Porada M, Gerdes T. Verbundwerkstoff und Verfahren zu seiner Herstellung (Mikrowellensintern). German Patent Appl. DE 4340652 A1. Ro¨diger, Dreyer, Gerdes, Kassel, Willert-Porada (bib9) 1997; 2 Gerdes, Willert-Porada, Ro¨diger (bib7) 1996; 430 Dreyer, Daub, Holzhauer, Orths, Kassel, Ro¨diger (bib1) 1997; 13 Richter, Ruthendorf, Drobniewski (bib3) 1997; 13 Ko¨nig, Meisel (bib2) 1995; 11 Gerdes (10.1016/S0263-4368(98)00050-X_bib5) 1995; 59 10.1016/S0263-4368(98)00050-X_bib4 Gerdes (10.1016/S0263-4368(98)00050-X_bib7) 1996; 430 Richter (10.1016/S0263-4368(98)00050-X_bib3) 1997; 13 Willert-Porada (10.1016/S0263-4368(98)00050-X_bib6) 1996 Ro¨diger (10.1016/S0263-4368(98)00050-X_bib9) 1997; 2 Gerdes (10.1016/S0263-4368(98)00050-X_bib8) 1996; 430 Meadows (10.1016/S0263-4368(98)00050-X_bib10) 1972 Dreyer (10.1016/S0263-4368(98)00050-X_bib1) 1997; 13 Ko¨nig (10.1016/S0263-4368(98)00050-X_bib2) 1995; 11
References_xml	– volume: 430 start-page: 175 year: 1996 end-page: 180 ident: bib8 article-title: Microwave reaction sintering of tungsten carbide cobalt hardmetals publication-title: Microwaves V contributor: fullname: Dreyer – volume: 11 start-page: 41 year: 1995 end-page: 58 ident: bib2 article-title: Ultrafeine Pulver-Herstellung, Verarbeitung und Anwendungen publication-title: Pulvermetallurgie in Wissenschaft und Praxis contributor: fullname: Meisel – volume: 2 start-page: 197 year: 1997 end-page: 213 ident: bib9 article-title: Neue Wege zur Herstellung von Fein-und Ultrafeinstkorn-Hartmetallen durch das Sintern im Mikrowellenfeld publication-title: Proc of the 14th Intern Plansee Sem Reutte contributor: fullname: Willert-Porada – volume: 13 start-page: 3 year: 1997 end-page: 27 ident: bib1 article-title: Trends in der Hartmetallfertigung: Legierungen, Verfahren, Produkte publication-title: Pulvermetallurgie in Wissenschaft und Praxis contributor: fullname: Ro¨diger – year: 1996 ident: bib6 article-title: Microwave sintering of hardmetals and ceramics publication-title: Proc Eur Conf Advances In Hard Mat Prod contributor: fullname: Kolaska – volume: 59 start-page: 423 year: 1995 end-page: 431 ident: bib5 article-title: Guidelines for large scale MW-processing of hardmetalls publication-title: Ceram Trans contributor: fullname: Ro¨diger – volume: 430 start-page: 45 year: 1996 end-page: 50 ident: bib7 article-title: Microwave sintering of tungsten carbide cobalt hardmetals publication-title: Mat Res Soc Symp Proc contributor: fullname: Ro¨diger – year: 1972 ident: bib10 article-title: Anisodimensional tungsten carbide platelets bonded with cobalt contributor: fullname: Meadows – volume: 13 start-page: 29 year: 1997 end-page: 45 ident: bib3 article-title: Perspektiven feinko¨rniger Hartmetalle publication-title: Pulvermetallurgie in Wissenschaft und Praxis contributor: fullname: Drobniewski – volume: 13 start-page: 3 year: 1997 ident: 10.1016/S0263-4368(98)00050-X_bib1 article-title: Trends in der Hartmetallfertigung: Legierungen, Verfahren, Produkte publication-title: Pulvermetallurgie in Wissenschaft und Praxis contributor: fullname: Dreyer – volume: 430 start-page: 45 year: 1996 ident: 10.1016/S0263-4368(98)00050-X_bib7 article-title: Microwave sintering of tungsten carbide cobalt hardmetals contributor: fullname: Gerdes – ident: 10.1016/S0263-4368(98)00050-X_bib4 – volume: 59 start-page: 423 year: 1995 ident: 10.1016/S0263-4368(98)00050-X_bib5 article-title: Guidelines for large scale MW-processing of hardmetalls publication-title: Ceram Trans contributor: fullname: Gerdes – volume: 430 start-page: 175 year: 1996 ident: 10.1016/S0263-4368(98)00050-X_bib8 article-title: Microwave reaction sintering of tungsten carbide cobalt hardmetals contributor: fullname: Gerdes – volume: 11 start-page: 41 year: 1995 ident: 10.1016/S0263-4368(98)00050-X_bib2 article-title: Ultrafeine Pulver-Herstellung, Verarbeitung und Anwendungen publication-title: Pulvermetallurgie in Wissenschaft und Praxis contributor: fullname: Ko¨nig – year: 1996 ident: 10.1016/S0263-4368(98)00050-X_bib6 article-title: Microwave sintering of hardmetals and ceramics contributor: fullname: Willert-Porada – volume: 13 start-page: 29 year: 1997 ident: 10.1016/S0263-4368(98)00050-X_bib3 article-title: Perspektiven feinko¨rniger Hartmetalle publication-title: Pulvermetallurgie in Wissenschaft und Praxis contributor: fullname: Richter – volume: 2 start-page: 197 year: 1997 ident: 10.1016/S0263-4368(98)00050-X_bib9 article-title: Neue Wege zur Herstellung von Fein-und Ultrafeinstkorn-Hartmetallen durch das Sintern im Mikrowellenfeld contributor: fullname: Ro¨diger – year: 1972 ident: 10.1016/S0263-4368(98)00050-X_bib10 contributor: fullname: Meadows
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Title	Microwave sintering of hardmetals
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