Measurement of thermal conductivity of nanofluids and thermal interface materials using the laser-based transient thermoreflectance method

We report on experimental investigation of thermal contact resistance, RC, of the noncuring graphene thermal interface materials with the surfaces characterized by different degree of roughness, Sq. It is found that the thermal contact resistance depends on the graphene loading, ξ, non-monotonically, achieving its minimum at the loading fraction of ξ ~15 wt %. Decreasing the surface roughness by Sq~1 μm results in approximately the factor of ×2 decrease in the thermal contact resistance for this graphene loading. The obtained dependences of the thermal conductivity, KTIM, thermal contact resistance, RC, and the total thermal resistance of the thermal interface material layer on ξ and Sq can be utilized for optimization of the loading fraction of graphene for specific materials and roughness of the connecting surfaces. Our results are important for the thermal management of high-power-density electronics implemented with diamond and other wide-band-gap semiconductors.

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“…Figure 3 b shows the data for the graphene loading of

and more so that the trends can be seen more clearly. The total thermal resistance increases linearly with

as expected [ 55 , 56 ]. The data were used to plot a linear regression fitting for each loading fraction.…”

Section: Resultssupporting

confidence: 76%

Noncured Graphene Thermal Interface Materials for High-Power Electronics: Minimizing the Thermal Contact Resistance

2021

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“…Another commercial high performing grease is ShinEtsu G751, with a conductivity close to 4.5 W/ mK. [41][42][43] Today, various grease TIMs are available on the market, and researchers continue to find ways to enhance existing greases for multiple applications. The main drawback of grease TIMs is the pump-out effect, dry out, the time required for it to cure and the difficulty when applying.…”

Section: Introductionmentioning

confidence: 99%

Advances in thermal contact resistance studies

Murwamadala

Veeredhi

2022

Proceedings of the Institution of Mechanical Engineers, Part C:

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The demand for accurate Thermal Contact Resistance analysis and prediction continues to increase with the advancement of technology. In applications such as manufacturing, it is beneficial to understand the Thermal Contact resistance between the workpiece and tool, or between the tool and debris or shavings to accurately predict the tool wear rate. It is essential to understand and analyze this parameter in aerospace, nuclear power generation, supercar braking systems, and similar applications where close tolerances are used. The continued technological advancements indicate further opportunities for research in Thermal Contact Resistance. This article surveys and summarizes industrial applications’ as well as experimental and theoretical studies. In addition recent advances in both experimental methods and predictive studies are also comprehensively summarized and highlight the trends and future needs of studies in Thermal Contact Resistance, these included recent advances in transient and steady state experimental methods. There is a clear need for optimization, versatility, and economical improvement of these methods. Moreover, the rise in advanced metrological technologies, instrumentation, and thermal measurement systems.

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Thermal Interface Materials

Prasher

Chiu

2016

Materials for Advanced Packaging

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Measurement of thermal conductivity of nanofluids and thermal interface materials using the laser-based transient thermoreflectance method

Cited by 4 publications

References 29 publications

Noncured Graphene Thermal Interface Materials for High-Power Electronics: Minimizing the Thermal Contact Resistance

Noncured Graphene Thermal Interface Materials for High-Power Electronics: Minimizing the Thermal Contact Resistance

Advances in thermal contact resistance studies

Thermal Interface Materials

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