Yd. Chung et al., THERMAL-DIFFUSIVITY OF PARTICULATE COMPOSITES MADE FROM ALUMINUM-OXIDE AND NICKEL ALUMINIDE BY A PHOTOTHERMAL DEFLECTION TECHNIQUE, Acta materialia, 45(7), 1997, pp. 2983-2993
Citations number
15
Categorie Soggetti
Material Science","Metallurgy & Metallurigical Engineering
The photothermal deflection technique is used to measure the thermal d
iffusivity of a metal-ceramic composite. The present, as well as other
data on composites are analyzed to estimate a value for the Kapitza r
adius, r(k), which represents the effective value of the thermal bound
ary resistance of heterointerfaces. Remarkably, the data from differen
t metal-ceramic composite materials lead to a similar value (within a
factor of about two), r(k) approximate to 1 mu m. Possible reasons for
this outcome are discussed in terms of the acoustic mismatch model fo
r thermal boundary resistance. Analysis of the data also suggests poss
ible anomalous effects in nanostructured materials. (C) 1997 Acm Metal
lurgica Inc.