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Thermal diffusivity of sintered stainless steel-alumina composites
KTH, Skolan för industriell teknik och management (ITM), Materialvetenskap, Materialens processvetenskap.
2006 (engelsk)Inngår i: Metallurgical and materials transactions. B, process metallurgy and materials processing science, ISSN 1073-5615, E-ISSN 1543-1916, Vol. 37, nr 4, s. 513-518Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

Thermal diffusivity measurements were carried out as a function of temperature on sintered AISI 304 stainless steel-alumina composites having various compositions (0.001, 0.01, 0, 1, 1, 2, 3, 5, 7, 8, and 10 wt pct Al2O3). The measurements were carried out between room temperature and 1473 K. The thermal diffusivity and the thermal conductivity were found to increase with temperature in all the composite specimens. The thermal diffusivity was found to decrease with increasing weight fraction of alumina. This tendency can clearly be seen at temperatures above 755 K. The experimental results are in good agreement with the simple rule of mixture, the Eucken equation, and the Ohm's law model developed by Hayashi et al. at weight fractions of alumina below 5 wt pct. Beyond this composition, the thermal diffusivity/conductivity shows a large discrepancy from the models. This could probably be attributed to the accumulation of alumina particles during cooled pressing and sintering.

sted, utgiver, år, opplag, sider
2006. Vol. 37, nr 4, s. 513-518
Emneord [en]
conductivity, prediction
Identifikatorer
URN: urn:nbn:se:kth:diva-15906ISI: 000239590300001OAI: oai:DiVA.org:kth-15906DiVA, id: diva2:333948
Merknad
QC 20100525Tilgjengelig fra: 2010-08-05 Laget: 2010-08-05 Sist oppdatert: 2017-12-12bibliografisk kontrollert

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