Ceramic dies selection for electrical resistance sintering of metallic materials |
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| Affiliation: | 1. Department of Chemical Engineering, Physical Chemistry and Materials Science, Escuela Técnica Superior de Ingeniería, Universidad de Huelva, Campus El Carmen, Avda. Tres de Marzo S/n, 21071, Huelva, Spain;2. MIRTEC (Materials Industrial Research & Technology Center), 72nd Km of Athens-Lamia National Road, P.O. Box 18646, 34100, Chalkida, Greece;3. Metallurgy and Materials Engineering Group, Escuela Técnica Superior de Ingeniería, Universidad de Sevilla, Camino de Los Descubrimientos, S/n, 41092, Sevilla, Spain;1. Laboratory of Advanced Science and Technology for Industry, University of Hyogo, Japan;2. Okayama Prefectural University, Japan;3. Minerva Light Lab. inc, Japan;1. Department of Chemistry, Faculty of Science, Cairo University, Giza, Egypt;2. Chemistry Department, College of Science, King Faisal University, Al-Hassa, Saudi Arabia;1. State Key Laboratory of Powder Metallurgy, Central South University, Changsha, 410083, People''s Republic of China;2. Research Centre for Materials Science and Engineering, Guangxi University of Science and Technology, Liuzhou, 545006, People''s Republic of China;3. School of Materials Science and Engineering, Xiangtan University, Xiangtan, 411105, People''s Republic of China;1. Institute of Materials Science and Engineering, National Taipei University of Technology,Taipei 10608, Taiwan;2. Department of Chemical and Materials Engineering, Chinese Culture University, Taipei 11114, Taiwan;3. School for Materials Science and Engineering, Beijing Institute of Technology, Beijing 100081, China;1. Departamento de Ingeniería Hidráulica y Ambiental, Pontificia Universidad Católica de Chile, Avda. Vicuña Mackenna, 4860, Macul, Santiago, Chile;2. Centro de Desarrollo Urbano Sustentable (CEDEUS), CONICYT/FONDAP/15110020, Santiago, RM, Chile;3. Center for Solar Energy Technologies (CSET), Santiago, RM, Chile;4. Departamento de Ecosistemas y Medio Ambiente, Facultad de Agronomía e Ingeniería Forestal, Pontificia Universidad Católica de Chile, Avda. Vicuña Mackenna, 4860, Macul, Santiago, Chile;5. Centro Interdisciplinario de Cambio Global, Pontificia Universidad Católica de Chile, Avda. Vicuña Mackenna, 4860, Macul, Santiago, Chile;6. Aquasec, IAI Center of Excellence for Water Security, Santiago, Chile;7. Centro de Excelencia en Geotermia de los Andes (CEGA), Santiago, RM, Chile |
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| Abstract: | Processing metallic powders by electrical resistance sintering requires the use of insulating ceramics dies. Selecting the appropriate ceramic material according to the electrical, thermal and mechanical properties is a need. Dies produced with several ceramic materials have been tested during the production of cemented carbide in order to check their behaviour in the process and final product properties. Tialite/mullite, zircon/mullite, zirconium phosphate based ceramic, yttria-stabilized zirconia and sialon, in most cases with modified compositions and shaping processes in order to achieve a high density, have been tested. Dry powder processing by cold isostatic pressing and furnace sintering resulted to be the better process for dies production. The effect of die properties on the produced cemented carbide, and the behaviour and life of the die during the production have been analysed. Very smooth die surface increases the number of cycles withstood during metallic parts production, because of lower extraction stresses, as checked for sialon dies. Zirconium phosphate based dies, with low thermal conductivity, show the most densified hard metal parts surface. |
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| Keywords: | Ceramic materials Insulating dies Electrical resistance sintering Cemented carbide |
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