Quantification and mitigation of uncertainties in thermal conductivity measurements using a modified ASTM D5470 thermal resistance tester

In this paper, we have investigated the effect of thermal interface materials (TIMs) on the accuracy and uncertainty of thermal conductivity measurements. A modified ASTM D5470 thermal resistance tester (TRT) has been developed to measure the out-of-plane thermal conductivity of pyrolytic graphite (PG) and titanium grade 2 (TiG2) with and without TIMs. Compared to the ASTM D5470 standard, this modified design uses three thermocouples per side to support regressive analysis of the temperature profile and quantifies the uncertainty of the measurements with and without TIMs. Nine PG samples and four TiG2 samples of varying thickness have been tested to obtain thermal resistance as a function of sample thickness. The steady-state temperature profiles were used for heat flux and thermal resistance calculation. The results reveal that TIMs significantly reduce measurement uncertainty for both samples, i.e., 38.8% for TiG2 and 27.8% for PG. The effect of TIMs on the measurement accuracy diverg..., , # Data from: Quantification and mitigation of uncertainties in thermal conductivity measurements using a modified ASTM D5470 thermal resistance tester

Dataset DOI: [10.5061/dryad.mcvdnckck](10.5061/dryad.mcvdnckck)

## Description of the data and file structure

This dataset includes temperature measurements over time for 6 thermocouples for steady state analysis of thermal resistance and thermal conductivity of Pyrolytic Graphite and Titanium Grade 2. The temperature data is measured using OMEGA TJ36-CPSS-032G-3 T-type thermocouples with a 0.032” probe diameter connected to a NI-9210 Thermocouple DAQ with Spring Terminals, attached to a NI-cDAQ-9174 DAQ Chassis which is connected to a computer running Windows 10. Time data is sampled at 1000 Hz (every 1 ms), starting at 0 s and continuing until manually stopped. The data acquisition setup is used in the facility described in the manuscript.

### Files and variables

**File:** DatasetsAndCode.zip

**Description:** The zip file \"ned3-00...,