Ceramic dies selection for electrical resistance sintering of metallic materials
| Autor: | Jesús Cintas, Yadir Torres, D. Andreouli, J. M. Gallardo, Juan Manuel Montes, V. Oikonomou, Francisco Gómez Cuevas |
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| Rok vydání: | 2019 |
| Předmět: |
010302 applied physics
Sialon Hard metal Materials science business.product_category Process Chemistry and Technology Metallurgy Sintering Mullite 02 engineering and technology 021001 nanoscience & nanotechnology 01 natural sciences Surfaces Coatings and Films Electronic Optical and Magnetic Materials visual_art 0103 physical sciences Materials Chemistry Ceramics and Composites visual_art.visual_art_medium Cemented carbide Die (manufacturing) Cubic zirconia Ceramic 0210 nano-technology business |
| Zdroj: | Ceramics International. 45:14555-14561 |
| ISSN: | 0272-8842 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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