Abstract
Thermal conductivity of pyrolytic carbon and silicon carbide coatings on spherical particles has been mapped using time-domain thermoreflectance. The thermal conductivities measured for pyrolytic carbon ranged between 3.4 and 13.5 W/m K. The effect of porosity, pore-size distribution, anisotropy, in-plane disorder and domain sizes is discussed. A thermal conductivity of 168 W/m K was obtained for SiC. Mapping of the thermal conductivity of coated fuel particles provides useful data for modeling fuel performance during the operation of nuclear reactors.
| Original language | English |
|---|---|
| Pages (from-to) | 35-39 |
| Number of pages | 5 |
| Journal | Journal of Nuclear Materials |
| Volume | 378 |
| Issue number | 1 |
| DOIs | |
| State | Published - Aug 15 2008 |
| Externally published | Yes |
Funding
The authors gratefully acknowledge the valuable assistance of X. Zhao and P.J. Meadows. The authors would also like to thank Nexia Solutions Ltd. for the financial support provided and CONACYT-México for a PhD Grant to E. López-Honorato. C.C. and D.G.C. acknowledge support from DOE BES, Division of Materials Sciences under Award No. DEFG02-91ER45439, through Materials Research Laboratory at the University of Illinois at Urbana-Champaign. Thermal conductivity measurements were performed in the Laser and Spectroscopy Facility at Frederick Seitz Materials Research Laboratory, University of Illinois, which is partially supported by the US Department of Energy under Grant DEFG02-91-ER45439.
| Funders | Funder number |
|---|---|
| CONACYT-México | |
| Division of Materials Sciences | DEFG02-91ER45439 |
| Nexia Solutions Ltd. | |
| U.S. Department of Energy | DEFG02-91-ER45439 |
| Basic Energy Sciences | |
| Materials Research Laboratory, University of Illinois at Urbana-Champaign |