Metal Foams: A Design Guide

54 Metal Foams: A Design Guide
Table 4.2 (continued)
(b) Scaling laws for thermal properties
Thermal properties Open-cell foam Closed-cell foam
Melting point (K), Tm As solid As solid
Max. service temp.
(K), Tmax
As solid As solid
Min. service temp.
(K), Tmin
As solid As solid
Specific heat (J/kg.K), As solid As solid
Cp
Thermal cond.
(W/m.K),
� �1.8 <
s
�
<
s
�1.65 s
� �1.8 <
s
�
<
s
Thermal exp.
(10 6 /K), ˛
As solid As solid
Latent heat (kJ/kg), L As solid As solid
(c) Scaling laws for electrical properties
Electrical properties Open-cell foam Closed-cell foam
Resistivity (10 8
ohm.m), R
�
s
� 1.6
< R Rs <
�
s
� 1.85
�
s
� 1.6
< R Rs <
�
s
� 1.65
s
� 1.85
whether a metal foam is a potential candidate. Examples of their use in this
way are given in Chapters 10 and 11.
References
Banhart, J. (1999) Private communication.
CES (1999) The Cambridge Engineering Selector, Granta Design Ltd, Trumpington Mews, 40B
High Street, Trumpington, Cambridge CB2 2LS, UK; tel: C44 1223 518895; fax: C44 1223
506432; web site: http//www.granta.co.uk
Degisher, P. (1999) Private communication.
Evans, A.G. (1997/1998/1999) (ed.) Ultralight Metal Structures, Division of Applied Sciences,
Harvard University, Cambridge, Mass, USA: the annual report on the MURI programme
sponsored by the Defence Advanced Research Projects Agency and Office of Naval Research.
Gibson, L.J. and Ashby, M.F. (1997) Cellular Solids, Structure and Properties, 2nd edition,
Cambridge University Press, Cambridge.
Simancik, F. (1999) Private communication.