Abstract
Engineered ceramics are widely used in a variety of industries in demanding thermal environments. In power electronics, for example, the thermal contact resistance (TCR) between ceramic insulators and metallic heat sinks can be a significant bottleneck to heat transfer. Despite this, the existing TCR literature has (for the most part) focused on metal–metal contacts. In this study, the thermal contact resistance between aluminum oxide, alumina nitride, and stainless steel is experimentally measured using the guarded heat flow meter technique, as per ASTM E1530 (“Standard Test Method for Evaluating the Resistance to Thermal Transmission of Materials by the Guarded Heat Flow Meter Technique,” ASTM International STD E1530-11, West Conshohocken, PA, 2016). Tests are conducted both under vacuum and under atmospheric pressure in order to compare results with existing metal–metal TCR models. Experimental results are within a 25% rms relative difference of existing statistical-based conforming rough plastic TCR models.
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