Thermal conductivity and interface thermal conductance of amorphous and crystalline Zr47Cu31Al13Ni9 alloys with a Y2O3 coating

Shukla, Nitin C.; Hao-Hsiang Liao; Abiade, Jeremiah T.; Fengxiao Liu; Liaw, Peter K.; Huxtable, Scott T.
February 2009
Applied Physics Letters;2/23/2009, Vol. 94 Issue 8, p081912
Academic Journal
We examine the thermal conductivity k and interface thermal conductance G for amorphous and crystalline Zr47Cu31Al13Ni9 alloys in contact with polycrystalline Y2O3. Using time-domain thermoreflectance, we find k=4.5 W m-1 K-1 for the amorphous metallic alloy of Zr47Cu31Al13Ni9 and k=5.0 W m-1 K-1 for the crystalline Zr47Cu31Al13Ni9. We also measure G=23 MW m-2 K-1 for the metallic glass/Y2O3 interface and G=26 MW m-2 K-1 for the interface between the crystalline Zr47Cu31Al13Ni9 and Y2O3. The thermal conductivity of the crystalline Y2O3 layer is found to be k=5.0 W m-1 K-1, and the conductances of Al/Y2O3 and Y2O3/Si interfaces are 68 and 45 MW m-2 K-1, respectively.


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