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Effect of Contact Pressure on the Performance of Carbon Nanotube Arrays Thermal Interface Material
Vertically aligned carbon nanotube (CNT) arrays are promising candidates for advanced thermal interface materials (TIMs) since they possess high mechanical compliance and high intrinsic thermal conductivity. Some of the previous works indicate that the CNT arrays in direct dry contact with the targe...
Autores principales: | , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
MDPI
2018
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6163777/ https://www.ncbi.nlm.nih.gov/pubmed/30227621 http://dx.doi.org/10.3390/nano8090732 |
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author | Pei, Yu Zhong, Hongmei Wang, Mengyu Zhang, Peng Zhao, Yang |
author_facet | Pei, Yu Zhong, Hongmei Wang, Mengyu Zhang, Peng Zhao, Yang |
author_sort | Pei, Yu |
collection | PubMed |
description | Vertically aligned carbon nanotube (CNT) arrays are promising candidates for advanced thermal interface materials (TIMs) since they possess high mechanical compliance and high intrinsic thermal conductivity. Some of the previous works indicate that the CNT arrays in direct dry contact with the target surface possess low contact thermal conductance, which is the dominant thermal resistance. Using a phase sensitive transient thermo-reflectance (PSTTR) technique, we measure the thermal conductance between CNT arrays and copper (Cu) surfaces under different pressures. The experiments demonstrated that the contact force is one of the crucial factors for optimizing the thermal performance of CNT array-based TIMs. The experimental results suggest that the Cu-CNT arrays’ contact thermal conductance has a strong dependence on the surface deformation and has an order of magnitude rise as the contact pressure increases from 0.05 to 0.15 MPa. However, further increase of the contact pressure beyond 0.15 MPa has little effect on the contact thermal resistance. This work could provide guidelines to determine the minimum requirement of packaging pressure on CNT TIMs. |
format | Online Article Text |
id | pubmed-6163777 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2018 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
spelling | pubmed-61637772018-10-10 Effect of Contact Pressure on the Performance of Carbon Nanotube Arrays Thermal Interface Material Pei, Yu Zhong, Hongmei Wang, Mengyu Zhang, Peng Zhao, Yang Nanomaterials (Basel) Article Vertically aligned carbon nanotube (CNT) arrays are promising candidates for advanced thermal interface materials (TIMs) since they possess high mechanical compliance and high intrinsic thermal conductivity. Some of the previous works indicate that the CNT arrays in direct dry contact with the target surface possess low contact thermal conductance, which is the dominant thermal resistance. Using a phase sensitive transient thermo-reflectance (PSTTR) technique, we measure the thermal conductance between CNT arrays and copper (Cu) surfaces under different pressures. The experiments demonstrated that the contact force is one of the crucial factors for optimizing the thermal performance of CNT array-based TIMs. The experimental results suggest that the Cu-CNT arrays’ contact thermal conductance has a strong dependence on the surface deformation and has an order of magnitude rise as the contact pressure increases from 0.05 to 0.15 MPa. However, further increase of the contact pressure beyond 0.15 MPa has little effect on the contact thermal resistance. This work could provide guidelines to determine the minimum requirement of packaging pressure on CNT TIMs. MDPI 2018-09-17 /pmc/articles/PMC6163777/ /pubmed/30227621 http://dx.doi.org/10.3390/nano8090732 Text en © 2018 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/). |
spellingShingle | Article Pei, Yu Zhong, Hongmei Wang, Mengyu Zhang, Peng Zhao, Yang Effect of Contact Pressure on the Performance of Carbon Nanotube Arrays Thermal Interface Material |
title | Effect of Contact Pressure on the Performance of Carbon Nanotube Arrays Thermal Interface Material |
title_full | Effect of Contact Pressure on the Performance of Carbon Nanotube Arrays Thermal Interface Material |
title_fullStr | Effect of Contact Pressure on the Performance of Carbon Nanotube Arrays Thermal Interface Material |
title_full_unstemmed | Effect of Contact Pressure on the Performance of Carbon Nanotube Arrays Thermal Interface Material |
title_short | Effect of Contact Pressure on the Performance of Carbon Nanotube Arrays Thermal Interface Material |
title_sort | effect of contact pressure on the performance of carbon nanotube arrays thermal interface material |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6163777/ https://www.ncbi.nlm.nih.gov/pubmed/30227621 http://dx.doi.org/10.3390/nano8090732 |
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