Effects of pore structure characteristics on performance of sintered bi-porous Ti3AlC2 wicks
Loop heat pipe, carried out by liquid-gas phase transition, has been attracted as an efficient heat management device in high-heat-flux, long-distance and anti-gravity situations. The capillary pressure provided by the porous wick in the evaporator drives circulation for working liquid, affecting th...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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IOP Publishing
2021-01-01
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| Series: | Materials Research Express |
| Subjects: | |
| Online Access: | https://doi.org/10.1088/2053-1591/abdcfa |
| _version_ | 1827869200222257152 |
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| author | Yingwen Cao Chunsheng Guo Dongting Wu Yong Zou |
| author_facet | Yingwen Cao Chunsheng Guo Dongting Wu Yong Zou |
| author_sort | Yingwen Cao |
| collection | DOAJ |
| description | Loop heat pipe, carried out by liquid-gas phase transition, has been attracted as an efficient heat management device in high-heat-flux, long-distance and anti-gravity situations. The capillary pressure provided by the porous wick in the evaporator drives circulation for working liquid, affecting the heat exchange efficiency for loop heat pipes directly. In this work, the bi-porous Ti _3 AlC _2 wick was produced by reaction sintering and pore formers dissolution and porosity and pore size were regulated by varying pore formers content and cold pressure. The pore size distribution was characterized by mercury intrusion and effects on capillary performance and thermal conductivity were also analyzed. The porosity and proportion of large pores increased with the increased pore formers content, causing the enhancement of capillary performance and the reduction of thermal conductivity. As the cold pressure increased, pore size distribution concentrated, the proportion of fine pores increased and the porosity fluctuated slightly, increasing the capillary pressure and improving capillary performance and thermal conductivity. Based on experimental results, the parameter of pore size proportion was proposed to modify the Alexander model to predict the thermal conductivity of porous materials accurately, guide the design for pore structure and promote the transfer capacity. |
| first_indexed | 2024-03-12T15:41:38Z |
| format | Article |
| id | doaj.art-e086d6f5c95a4c888934d91304535bc0 |
| institution | Directory Open Access Journal |
| issn | 2053-1591 |
| language | English |
| last_indexed | 2024-03-12T15:41:38Z |
| publishDate | 2021-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| series | Materials Research Express |
| spelling | doaj.art-e086d6f5c95a4c888934d91304535bc02023-08-09T15:57:19ZengIOP PublishingMaterials Research Express2053-15912021-01-018101560210.1088/2053-1591/abdcfaEffects of pore structure characteristics on performance of sintered bi-porous Ti3AlC2 wicksYingwen Cao0https://orcid.org/0000-0002-8640-0798Chunsheng Guo1Dongting Wu2https://orcid.org/0000-0002-3463-2888Yong Zou3School of Materials Science and Engineering, Shandong University , Jinan, Shandong, 250061, People’s Republic of ChinaSchool of Mechanical and Electronic Engineering, Shandong University at Weihai , Weihai, Shandong, 264209, People’s Republic of ChinaKey Laboratory of Liquid-Solid Structural Evolution and Processing of Materials, Ministry of Education, Shandong University , Jinan, Shandong, 250061, People’s Republic of ChinaShandong Engineering and Technology Research Center for Modern Welding, Shandong University , Jinan, Shandong, 250061, People’s Republic of ChinaLoop heat pipe, carried out by liquid-gas phase transition, has been attracted as an efficient heat management device in high-heat-flux, long-distance and anti-gravity situations. The capillary pressure provided by the porous wick in the evaporator drives circulation for working liquid, affecting the heat exchange efficiency for loop heat pipes directly. In this work, the bi-porous Ti _3 AlC _2 wick was produced by reaction sintering and pore formers dissolution and porosity and pore size were regulated by varying pore formers content and cold pressure. The pore size distribution was characterized by mercury intrusion and effects on capillary performance and thermal conductivity were also analyzed. The porosity and proportion of large pores increased with the increased pore formers content, causing the enhancement of capillary performance and the reduction of thermal conductivity. As the cold pressure increased, pore size distribution concentrated, the proportion of fine pores increased and the porosity fluctuated slightly, increasing the capillary pressure and improving capillary performance and thermal conductivity. Based on experimental results, the parameter of pore size proportion was proposed to modify the Alexander model to predict the thermal conductivity of porous materials accurately, guide the design for pore structure and promote the transfer capacity.https://doi.org/10.1088/2053-1591/abdcfabi-porousTi3AlC2capillarypore sizethermal conductivity |
| spellingShingle | Yingwen Cao Chunsheng Guo Dongting Wu Yong Zou Effects of pore structure characteristics on performance of sintered bi-porous Ti3AlC2 wicks Materials Research Express bi-porous Ti3AlC2 capillary pore size thermal conductivity |
| title | Effects of pore structure characteristics on performance of sintered bi-porous Ti3AlC2 wicks |
| title_full | Effects of pore structure characteristics on performance of sintered bi-porous Ti3AlC2 wicks |
| title_fullStr | Effects of pore structure characteristics on performance of sintered bi-porous Ti3AlC2 wicks |
| title_full_unstemmed | Effects of pore structure characteristics on performance of sintered bi-porous Ti3AlC2 wicks |
| title_short | Effects of pore structure characteristics on performance of sintered bi-porous Ti3AlC2 wicks |
| title_sort | effects of pore structure characteristics on performance of sintered bi porous ti3alc2 wicks |
| topic | bi-porous Ti3AlC2 capillary pore size thermal conductivity |
| url | https://doi.org/10.1088/2053-1591/abdcfa |
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