Thermal characteristics of a two-phase composite
Journal
Advanced Powder Technology
Journal Volume
27
Journal Issue
3
Pages
929-934
Date Issued
2016
Author(s)
Abstract
Aluminum oxide (Al2O3) is an electrically insulating ceramic with phonons as heat carriers; nickel aluminide (NiAl) is an intermetallic with free electrons. In the present study, dense NiAl-Al2O3 composites are prepared by hot-pressing. The Al2O3 content in the composites varies from 0% to 100%. The thermal properties of the composites, including thermal diffusivity and heat capacity, are measured independently. The thermal conductivity is then calculated accordingly. Attempts are made to establish the upper and lower bounds for the experimental data. Though the values predicted by the parallel-series bounds cover most of the experimental data, the values for composites with either isolated NiAl or Al2O3 particles are not within these bounds; these composites may offer new opportunities for thermal management applications.
SDGs
Type
journal article