Noncured Graphene Thermal Interface Materials for High-Power Electronics: Minimizing the Thermal Contact Resistance
We report on experimental investigation of thermal contact resistance, <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><msub><mi>R</mi><mi>C</mi></msub></mrow><...
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doaj-d991faee158f464cb40fc65a83154e132021-07-23T13:57:22ZengMDPI AGNanomaterials2079-49912021-06-01111699169910.3390/nano11071699Noncured Graphene Thermal Interface Materials for High-Power Electronics: Minimizing the Thermal Contact ResistanceSriharsha Sudhindra0Fariborz Kargar1Alexander A. Balandin2Phonon Optimized Engineered Materials Center, Department of Electrical and Computer Engineering, University of California, Riverside, CA 92521, USAPhonon Optimized Engineered Materials Center, Department of Electrical and Computer Engineering, University of California, Riverside, CA 92521, USAPhonon Optimized Engineered Materials Center, Department of Electrical and Computer Engineering, University of California, Riverside, CA 92521, USAWe report on experimental investigation of thermal contact resistance, <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><msub><mi>R</mi><mi>C</mi></msub></mrow></semantics></math></inline-formula>, of the noncuring graphene thermal interface materials with the surfaces characterized by different degree of roughness, <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><msub><mi>S</mi><mi>q</mi></msub></mrow></semantics></math></inline-formula>. It is found that the thermal contact resistance depends on the graphene loading, <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mi>ξ</mi></semantics></math></inline-formula>, non-monotonically, achieving its minimum at the loading fraction of <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mi>ξ</mi><mo> </mo><mo>~</mo><mn>15</mn><mo> </mo><mrow><mi>wt</mi><mo>%</mo></mrow></mrow></semantics></math></inline-formula>. Decreasing the surface roughness by <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><msub><mi>S</mi><mi>q</mi></msub><mo>~</mo><mn>1</mn><mrow><mo> </mo><mi mathvariant="sans-serif">μ</mi><mi mathvariant="normal">m</mi></mrow></mrow></semantics></math></inline-formula> results in approximately the factor of ×2 decrease in the thermal contact resistance for this graphene loading. The obtained dependences of the thermal conductivity, <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><msub><mi>K</mi><mrow><mi>T</mi><mi>I</mi><mi>M</mi></mrow></msub></mrow></semantics></math></inline-formula>, thermal contact resistance, <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><msub><mi>R</mi><mi>C</mi></msub></mrow></semantics></math></inline-formula>, and the total thermal resistance of the thermal interface material layer on <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mi>ξ</mi></semantics></math></inline-formula> and <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><msub><mi>S</mi><mi>q</mi></msub></mrow></semantics></math></inline-formula> 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.https://www.mdpi.com/2079-4991/11/7/1699surface roughnessthermal contact resistancethermal conductivitygraphenesilicone oilthermal interface materials |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Sriharsha Sudhindra Fariborz Kargar Alexander A. Balandin |
spellingShingle |
Sriharsha Sudhindra Fariborz Kargar Alexander A. Balandin Noncured Graphene Thermal Interface Materials for High-Power Electronics: Minimizing the Thermal Contact Resistance Nanomaterials surface roughness thermal contact resistance thermal conductivity graphene silicone oil thermal interface materials |
author_facet |
Sriharsha Sudhindra Fariborz Kargar Alexander A. Balandin |
author_sort |
Sriharsha Sudhindra |
title |
Noncured Graphene Thermal Interface Materials for High-Power Electronics: Minimizing the Thermal Contact Resistance |
title_short |
Noncured Graphene Thermal Interface Materials for High-Power Electronics: Minimizing the Thermal Contact Resistance |
title_full |
Noncured Graphene Thermal Interface Materials for High-Power Electronics: Minimizing the Thermal Contact Resistance |
title_fullStr |
Noncured Graphene Thermal Interface Materials for High-Power Electronics: Minimizing the Thermal Contact Resistance |
title_full_unstemmed |
Noncured Graphene Thermal Interface Materials for High-Power Electronics: Minimizing the Thermal Contact Resistance |
title_sort |
noncured graphene thermal interface materials for high-power electronics: minimizing the thermal contact resistance |
publisher |
MDPI AG |
series |
Nanomaterials |
issn |
2079-4991 |
publishDate |
2021-06-01 |
description |
We report on experimental investigation of thermal contact resistance, <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><msub><mi>R</mi><mi>C</mi></msub></mrow></semantics></math></inline-formula>, of the noncuring graphene thermal interface materials with the surfaces characterized by different degree of roughness, <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><msub><mi>S</mi><mi>q</mi></msub></mrow></semantics></math></inline-formula>. It is found that the thermal contact resistance depends on the graphene loading, <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mi>ξ</mi></semantics></math></inline-formula>, non-monotonically, achieving its minimum at the loading fraction of <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mi>ξ</mi><mo> </mo><mo>~</mo><mn>15</mn><mo> </mo><mrow><mi>wt</mi><mo>%</mo></mrow></mrow></semantics></math></inline-formula>. Decreasing the surface roughness by <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><msub><mi>S</mi><mi>q</mi></msub><mo>~</mo><mn>1</mn><mrow><mo> </mo><mi mathvariant="sans-serif">μ</mi><mi mathvariant="normal">m</mi></mrow></mrow></semantics></math></inline-formula> results in approximately the factor of ×2 decrease in the thermal contact resistance for this graphene loading. The obtained dependences of the thermal conductivity, <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><msub><mi>K</mi><mrow><mi>T</mi><mi>I</mi><mi>M</mi></mrow></msub></mrow></semantics></math></inline-formula>, thermal contact resistance, <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><msub><mi>R</mi><mi>C</mi></msub></mrow></semantics></math></inline-formula>, and the total thermal resistance of the thermal interface material layer on <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mi>ξ</mi></semantics></math></inline-formula> and <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><msub><mi>S</mi><mi>q</mi></msub></mrow></semantics></math></inline-formula> 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. |
topic |
surface roughness thermal contact resistance thermal conductivity graphene silicone oil thermal interface materials |
url |
https://www.mdpi.com/2079-4991/11/7/1699 |
work_keys_str_mv |
AT sriharshasudhindra noncuredgraphenethermalinterfacematerialsforhighpowerelectronicsminimizingthethermalcontactresistance AT fariborzkargar noncuredgraphenethermalinterfacematerialsforhighpowerelectronicsminimizingthethermalcontactresistance AT alexanderabalandin noncuredgraphenethermalinterfacematerialsforhighpowerelectronicsminimizingthethermalcontactresistance |
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1721286825922789376 |