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Effects of porosity on the thermal properties of a 380-aluminum alloy

Published online by Cambridge University Press:  31 January 2011

A. Manzano Ramírez ,
F. J. Espinoza Beltrán ,
J. M. Yáñez-Limón ,
Yuri V. Vorobiev ,
J. González-Hernández  and
J. M. Hallen
A. Manzano Ramírez
Affiliation:
CINVESTAV-Qro., Laboratorio de Investigación en Materiales, Centro Universitario UAQ, Cerro las Campanas s/n C.P. 76010 Querétaro Qro., México
F. J. Espinoza Beltrán
Affiliation:
CINVESTAV-Qro., Laboratorio de Investigación en Materiales, Centro Universitario UAQ, Cerro las Campanas s/n C.P. 76010 Querétaro Qro., México
J. M. Yáñez-Limón
Affiliation:
CINVESTAV-Qro., Laboratorio de Investigación en Materiales, Centro Universitario UAQ, Cerro las Campanas s/n C.P. 76010 Querétaro Qro., México
Yuri V. Vorobiev
Affiliation:
CINVESTAV-Qro., Laboratorio de Investigación en Materiales, Centro Universitario UAQ, Cerro las Campanas s/n C.P. 76010 Querétaro Qro., México
J. González-Hernández
Affiliation:
CINVESTAV-Qro., Laboratorio de Investigación en Materiales, Centro Universitario UAQ, Cerro las Campanas s/n C.P. 76010 Querétaro Qro., México
J. M. Hallen
Affiliation:
ESIQUIE Departamento de Ingeniería Metalúrgica, Unidad Profesional A. Lopez Mateos, A:P: 75-373 C.P. 07300 México, D.F.
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Abstract

Effective values of the thermal diffusivity, specific heat, and thermal conductivity of a porous 380-aluminum alloy prepared by melting in a gas-fired furnace, were determined as a function of the volume fraction of porosity. For that, photoacoustic, differential calorimetric, density, and image analyzer measurements were done. Thermal conductivity and specific heat capacity decrease with the increase of porosity, whereas the thermal diffusivity shows less dependence. Among the effective models for analysis of the thermal conductivity of a two-phase system, the Maxwell model best fits the experimental data, implying a homogenous distribution of the pores in the aluminum-alloy matrix.

Type
Articles
Information
Journal of Materials Research , Volume 14 , Issue 10 , October 1999 , pp. 3901 - 3906
Copyright
Copyright © Materials Research Society 1999

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