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A New Approach to Compute the Porosity and Surface Roughness of Porous Coated Capillary-Assisted Low Pressure Evaporators
The fundamental characteristics of metal coatings that influence heat transfer are porosity and surface roughness. It is a challenge to analyze the porosity and surface roughness due to the inadequate amount of copper per coated area. In this study, a new approach to non-invasively determine the por...
Autores principales: | , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Nature Publishing Group UK
2018
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6076235/ https://www.ncbi.nlm.nih.gov/pubmed/30076333 http://dx.doi.org/10.1038/s41598-018-30090-9 |
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author | Cheppudira Thimmaiah, Poovanna Panda, Asish Kumar Pandey, Upendra Kumar McCague, Claire Dutta, Pradip Bahrami, Majid |
author_facet | Cheppudira Thimmaiah, Poovanna Panda, Asish Kumar Pandey, Upendra Kumar McCague, Claire Dutta, Pradip Bahrami, Majid |
author_sort | Cheppudira Thimmaiah, Poovanna |
collection | PubMed |
description | The fundamental characteristics of metal coatings that influence heat transfer are porosity and surface roughness. It is a challenge to analyze the porosity and surface roughness due to the inadequate amount of copper per coated area. In this study, a new approach to non-invasively determine the porosity of metal films utilizing a helium pycnometer and computed micro-tomography (CMT) is presented. Furthermore, a telescope-goniometer is used to measure the surface roughness. Experiments are conducted on four varieties of thin film samples coated with copper powder using wire flame and plasma thermal spray coating methods. The porosities of the thin films were determined to be between 39 and 43%. The thermal spray coating increased the hydrophobicity of the surface and the plasma coating created super-hydrophobic surfaces. The new approach establishes that the porosity of thin films can be non-invasively determined and may also be applied to a wide variety of coated surfaces. |
format | Online Article Text |
id | pubmed-6076235 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2018 |
publisher | Nature Publishing Group UK |
record_format | MEDLINE/PubMed |
spelling | pubmed-60762352018-08-07 A New Approach to Compute the Porosity and Surface Roughness of Porous Coated Capillary-Assisted Low Pressure Evaporators Cheppudira Thimmaiah, Poovanna Panda, Asish Kumar Pandey, Upendra Kumar McCague, Claire Dutta, Pradip Bahrami, Majid Sci Rep Article The fundamental characteristics of metal coatings that influence heat transfer are porosity and surface roughness. It is a challenge to analyze the porosity and surface roughness due to the inadequate amount of copper per coated area. In this study, a new approach to non-invasively determine the porosity of metal films utilizing a helium pycnometer and computed micro-tomography (CMT) is presented. Furthermore, a telescope-goniometer is used to measure the surface roughness. Experiments are conducted on four varieties of thin film samples coated with copper powder using wire flame and plasma thermal spray coating methods. The porosities of the thin films were determined to be between 39 and 43%. The thermal spray coating increased the hydrophobicity of the surface and the plasma coating created super-hydrophobic surfaces. The new approach establishes that the porosity of thin films can be non-invasively determined and may also be applied to a wide variety of coated surfaces. Nature Publishing Group UK 2018-08-03 /pmc/articles/PMC6076235/ /pubmed/30076333 http://dx.doi.org/10.1038/s41598-018-30090-9 Text en © The Author(s) 2018 Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/. |
spellingShingle | Article Cheppudira Thimmaiah, Poovanna Panda, Asish Kumar Pandey, Upendra Kumar McCague, Claire Dutta, Pradip Bahrami, Majid A New Approach to Compute the Porosity and Surface Roughness of Porous Coated Capillary-Assisted Low Pressure Evaporators |
title | A New Approach to Compute the Porosity and Surface Roughness of Porous Coated Capillary-Assisted Low Pressure Evaporators |
title_full | A New Approach to Compute the Porosity and Surface Roughness of Porous Coated Capillary-Assisted Low Pressure Evaporators |
title_fullStr | A New Approach to Compute the Porosity and Surface Roughness of Porous Coated Capillary-Assisted Low Pressure Evaporators |
title_full_unstemmed | A New Approach to Compute the Porosity and Surface Roughness of Porous Coated Capillary-Assisted Low Pressure Evaporators |
title_short | A New Approach to Compute the Porosity and Surface Roughness of Porous Coated Capillary-Assisted Low Pressure Evaporators |
title_sort | new approach to compute the porosity and surface roughness of porous coated capillary-assisted low pressure evaporators |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6076235/ https://www.ncbi.nlm.nih.gov/pubmed/30076333 http://dx.doi.org/10.1038/s41598-018-30090-9 |
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