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Descripción
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| The combination of tungsten carbide and copper as a thermal barrier could effectively reduce the thermal mismatch between tungsten and copper alloy, which are proposed as base armour and heat sink, respectively, in the divertor of future fusion reactors. Hence, the aim of this work is to study the thermo-mechanical properties of WC-Cu cermets fabricated by hot pressing. Focus is placed on the temperature effect and composition dependence, as the volume fraction of copper varies from 25 to 50 and 75 %. To explore this behaviour, fracture experiments are performed within a temperature range from room temperature to 800 ºC under vacuum. In addition, elastic modulus and thermal expansion coefficient are estimated from these tests. Results reveal a strong dependence of the performance on temperature and on the volume fraction of copper and, surprisingly, a slight percent of Cu (25 vol. %) can effectively reduce the large difference in thermal expansion between tungsten and copper alloy, what is a critical point for in service applications. | |
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Internacional
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Si |
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Nombre congreso
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European Congress and Exhibition on Advanced Materials and Processes |
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Tipo de participación
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960 |
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Lugar del congreso
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Revisores
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Si |
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ISBN o ISSN
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0000-0000 |
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DOI
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Fecha inicio congreso
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17/09/2017 |
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Fecha fin congreso
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22/09/2017 |
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Desde la página
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1 |
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Hasta la página
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1 |
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Título de las actas
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High temperature mechanical behavior of WC-Cu thermal barriers for fusion applications |