Thermal conductivity of selected cermet materials

Krishnaiah, M. V. ; Seenivasan, G. ; Srirama Murti, P. ; Mathews, C. K. (2003) Thermal conductivity of selected cermet materials Journal of Alloys and Compounds, 353 (1-2). pp. 315-321. ISSN 0925-8388

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Official URL: http://linkinghub.elsevier.com/retrieve/pii/S09258...

Related URL: http://dx.doi.org/10.1016/S0925-8388(02)01326-9

Abstract

Cermets offer the benefits of both ceramics and metals. Due to the benefits associated with cermets, especially high temperature stability and thermal conductivity, there is renewed interest in their thermophysical properties. The present work describes thermal conductivity studies on selected cermets using laser flash technique in the temperature range 673-1373 K. This work describes the preparation and thermal conductivity measurement of urania-nickel cermets of composition 20 and 30 wt.% nickel by the solid-state reaction method. The thermal conductivity value is obtained as a product of the measured thermal diffusivity, estimated specific heat and room temperature density of these cermets. The theoretical value of the thermal conductivity is also computed for these cermets using different models for two-phase solid mixtures, such as parallel, series and Maxwell models. The calculated thermal conductivity, obtained using measured thermal diffusivity, of these cermets is compared with the theoretical values from the above models. Thermal conductivity integral values are also calculated and presented here.

Item Type:Article
Source:Copyright of this article belongs to Elsevier Science.
Keywords:Composite Materials; Nuclear Reactor Materials; Microstructure; Heat Conduction
ID Code:25411
Deposited On:06 Dec 2010 13:26
Last Modified:06 Jun 2011 11:05

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