|About this Abstract
||2017 TMS Annual Meeting & Exhibition
||Ceramic Materials for Nuclear Energy Research and Applications
||Anisotropic Thermal Conductivity and Interface Resistance in Pyrolytic Carbon Coated Zirconia Particles
||Yuzhou Wang, David Hurley, Erik Luther, Miles Beaux, Venkateswara Rao, Igor Usov, Marat Khafizov
|On-Site Speaker (Planned)
Pyrolytic carbon (PyC) is used in composite materials. Its primary function is to act as an interphase layer that arrests crack propagation offering greater mechanical integrity to the composite. Its anisotropic properties due to layered structure of graphene sheets can be a limiting factor in nuclear applications. Here we investigate thermal transport in a composite consisting of zirconia (ZrO2) spherical kernels coated with a thin PyC layer. We implement laser-based thermal wave microscopy to measure anisotropic thermal conductivity in PyC and PyC/ZrO2 interface thermal resistance. The conductivity in circumferential direction is about 15 W/mĚK whereas radial conductivity is less than 1 W/mĚK. The interface resistance is on the order of 10-8 m2ĚK/W. The results of this work have implications for development of accident tolerant fuels where precise knowledge of conductivity is a critical design parameter and measurement of anisotropy in PyC layers of TRISO fuels to assess their mechanical integrity.
||Planned: Supplemental Proceedings volume