Abstract
This work is focused on the analysis high-density infrared (HDI) sheet fabrication process of powder compacts. Measurements of material properties and distribution of incident heat flux on processed powder sheet surfaces have been conducted with the aim of obtaining a complete set of data that can be used as input in computer simulation software. It was found that these materials exhibit significant anisotropy in thermal conductivity. Indirect measurements indicate that there are small variations in density across the thickness of the powder compacts. Temperature data were obtained from thermocouples placed on the backside of the sheet. The evolution of thermal profile during a static pulse was investigated by using a three-dimensional finite volume model. Numerical simulation results are very sensitive to the surface emissivity. Numerical simulation results agree very well with experimental results for the case in which no liquid pool was formed during HDI processing.
| Original language | English |
|---|---|
| Pages (from-to) | 3043-3054 |
| Number of pages | 12 |
| Journal | Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science |
| Volume | 34 |
| Issue number | 12 |
| DOIs | |
| State | Published - Dec 2003 |
Funding
The authors thank D.B. Kothe, Los Alamos National Laboratory, for providing access to the Telluride code for the computations done in this study. The authors also thank R. Keith Bird, NASA Langley Research Center, and Leo Christodolou, DARPA, for their support and for funding this research. This research was performed at the Oak Ridge National Laboratory (ORNL) and sponsored under the Work-for-Others Program with the United States Department of Energy under Contract No. DE-AC05-00OR22725 with UT–Battelle, LLC. The authors thank T.N. Tiegs and S. Babu for reviewing the articles.