Characterization of Porosity and Copper Infiltration Mechanism in Sintered Steel via Computed Tomography
This study employs CT non-destructive detection to quantitatively analyze the pore structure of sintered steel and investigate copper infiltration mechanisms. As density increases from 6.55 to 6.95 g/cm<sup>3</sup>, pore characteristics exhibit significant changes: pore quantity initiall...
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| Format: | Article |
| Language: | English |
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MDPI AG
2025-06-01
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| Series: | Metals |
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| Online Access: | https://www.mdpi.com/2075-4701/15/6/635 |
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| author | Pengcheng Lin Linshan Wang Shuanghua Liang Xuebing Liang Qiang Hu Limin Wang Xuanhui Qu |
| author_facet | Pengcheng Lin Linshan Wang Shuanghua Liang Xuebing Liang Qiang Hu Limin Wang Xuanhui Qu |
| author_sort | Pengcheng Lin |
| collection | DOAJ |
| description | This study employs CT non-destructive detection to quantitatively analyze the pore structure of sintered steel and investigate copper infiltration mechanisms. As density increases from 6.55 to 6.95 g/cm<sup>3</sup>, pore characteristics exhibit significant changes: pore quantity initially increases then decreases, while average pore size monotonically reduces from 35.7 to 17.2 μm. Copper infiltration dramatically transforms the material’s porosity, characterized by reduced pore count, decreased distribution uniformity, increased closed pore proportion, and morphological regularization. The infiltration process demonstrates selective filling, primarily governed by pore connectivity, size effect, and capillary forces. Molten copper preferentially penetrates high-connectivity networks, prioritizing irregular angular regions. Medium-sized pores (10.52–23.76 μm) with optimal connectivity are predominantly filled. At 6.75 g/cm<sup>3</sup>, an optimal balance between pore quantity, size, and connectivity facilitates uniform copper infiltration. |
| format | Article |
| id | doaj-art-2838ed036d7b44069c9bcceb01b2ea7f |
| institution | Kabale University |
| issn | 2075-4701 |
| language | English |
| publishDate | 2025-06-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Metals |
| spelling | doaj-art-2838ed036d7b44069c9bcceb01b2ea7f2025-08-20T03:29:43ZengMDPI AGMetals2075-47012025-06-0115663510.3390/met15060635Characterization of Porosity and Copper Infiltration Mechanism in Sintered Steel via Computed TomographyPengcheng Lin0Linshan Wang1Shuanghua Liang2Xuebing Liang3Qiang Hu4Limin Wang5Xuanhui Qu6Metal Powder Materials Industrial Technology Research Institute of GRINM, Beijing 101407, ChinaMetal Powder Materials Industrial Technology Research Institute of GRINM, Beijing 101407, ChinaMetal Powder Materials Industrial Technology Research Institute of GRINM, Beijing 101407, ChinaMetal Powder Materials Industrial Technology Research Institute of GRINM, Beijing 101407, ChinaMetal Powder Materials Industrial Technology Research Institute of GRINM, Beijing 101407, ChinaMetal Powder Materials Industrial Technology Research Institute of GRINM, Beijing 101407, ChinaInstitute for Advanced Materials and Technology, University of Science and Technology Beijing, Beijing 100083, ChinaThis study employs CT non-destructive detection to quantitatively analyze the pore structure of sintered steel and investigate copper infiltration mechanisms. As density increases from 6.55 to 6.95 g/cm<sup>3</sup>, pore characteristics exhibit significant changes: pore quantity initially increases then decreases, while average pore size monotonically reduces from 35.7 to 17.2 μm. Copper infiltration dramatically transforms the material’s porosity, characterized by reduced pore count, decreased distribution uniformity, increased closed pore proportion, and morphological regularization. The infiltration process demonstrates selective filling, primarily governed by pore connectivity, size effect, and capillary forces. Molten copper preferentially penetrates high-connectivity networks, prioritizing irregular angular regions. Medium-sized pores (10.52–23.76 μm) with optimal connectivity are predominantly filled. At 6.75 g/cm<sup>3</sup>, an optimal balance between pore quantity, size, and connectivity facilitates uniform copper infiltration.https://www.mdpi.com/2075-4701/15/6/635powder metallurgysintered steelpore structuretortuositycapillary number |
| spellingShingle | Pengcheng Lin Linshan Wang Shuanghua Liang Xuebing Liang Qiang Hu Limin Wang Xuanhui Qu Characterization of Porosity and Copper Infiltration Mechanism in Sintered Steel via Computed Tomography Metals powder metallurgy sintered steel pore structure tortuosity capillary number |
| title | Characterization of Porosity and Copper Infiltration Mechanism in Sintered Steel via Computed Tomography |
| title_full | Characterization of Porosity and Copper Infiltration Mechanism in Sintered Steel via Computed Tomography |
| title_fullStr | Characterization of Porosity and Copper Infiltration Mechanism in Sintered Steel via Computed Tomography |
| title_full_unstemmed | Characterization of Porosity and Copper Infiltration Mechanism in Sintered Steel via Computed Tomography |
| title_short | Characterization of Porosity and Copper Infiltration Mechanism in Sintered Steel via Computed Tomography |
| title_sort | characterization of porosity and copper infiltration mechanism in sintered steel via computed tomography |
| topic | powder metallurgy sintered steel pore structure tortuosity capillary number |
| url | https://www.mdpi.com/2075-4701/15/6/635 |
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