A new method for preparing high-quality and fatigue-resistant divertor W/Cu joints
Due to the insolubility between W and Cu and the inability to generate intermetallic compounds, connecting W and Cu poses a considerable challenge. In this study, a casting assisted vacuum hot pressing (VHP) method is adopted to join W and Cu, and the process parameters are optimized. The casting te...
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| Format: | Article |
| Language: | English |
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Elsevier
2025-03-01
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| Series: | Nuclear Materials and Energy |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2352179125000225 |
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| author | Nanyu Mou Qianqian Lin Mingchi Feng Shuai Huang Le Han Damao Yao |
| author_facet | Nanyu Mou Qianqian Lin Mingchi Feng Shuai Huang Le Han Damao Yao |
| author_sort | Nanyu Mou |
| collection | DOAJ |
| description | Due to the insolubility between W and Cu and the inability to generate intermetallic compounds, connecting W and Cu poses a considerable challenge. In this study, a casting assisted vacuum hot pressing (VHP) method is adopted to join W and Cu, and the process parameters are optimized. The casting temperature is 1180 °C and the most suitable bonding parameters are a bonding temperature of 650 °C, a bonding pressure of 25 MPa and a bonding time of 90 min. The obtained W/Cu joint exhibits an average shear strength of 138.0 MPa and with no detectable defects on the interface. The effective bonding area of W/Cu joints exceed 98 %. The thermal conductivity of W/Cu prepared by casting assisted VHP is 347, 288, and 257 W/m·K at room temperature, 500 °C, and 900 °C, respectively, exceeding that of W/Cu prepared by casting assisted hot isostatic pressing (HIP) at the corresponding temperatures. The heat transfer performance and structural integrity of the prepared divertor mockup remain satisfactory after 1000 cycles at 20 MW/m2, with a peak surface temperature of 725.7 ℃. The proposed method provides a new strategy for preparing high-performance and fatigue resistant W/Cu joints, to address the issues of low bonding performance as well as poor fatigue resistance. |
| format | Article |
| id | doaj-art-e0feb4fb08834abba158aa57c71f3a22 |
| institution | DOAJ |
| issn | 2352-1791 |
| language | English |
| publishDate | 2025-03-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Nuclear Materials and Energy |
| spelling | doaj-art-e0feb4fb08834abba158aa57c71f3a222025-08-20T02:56:52ZengElsevierNuclear Materials and Energy2352-17912025-03-014210188210.1016/j.nme.2025.101882A new method for preparing high-quality and fatigue-resistant divertor W/Cu jointsNanyu Mou0Qianqian Lin1Mingchi Feng2Shuai Huang3Le Han4Damao Yao5School of Advanced Manufacturing Engineering, Chongqing University of Posts and Telecommunications, Chongqing 400065 China; Corresponding author.Institute of Plasma Physics, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei 230031 China; University of Science & Technology of China, Hefei 230031 ChinaSchool of Advanced Manufacturing Engineering, Chongqing University of Posts and Telecommunications, Chongqing 400065 ChinaSchool of Advanced Manufacturing Engineering, Chongqing University of Posts and Telecommunications, Chongqing 400065 ChinaInstitute of Plasma Physics, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei 230031 ChinaInstitute of Plasma Physics, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei 230031 ChinaDue to the insolubility between W and Cu and the inability to generate intermetallic compounds, connecting W and Cu poses a considerable challenge. In this study, a casting assisted vacuum hot pressing (VHP) method is adopted to join W and Cu, and the process parameters are optimized. The casting temperature is 1180 °C and the most suitable bonding parameters are a bonding temperature of 650 °C, a bonding pressure of 25 MPa and a bonding time of 90 min. The obtained W/Cu joint exhibits an average shear strength of 138.0 MPa and with no detectable defects on the interface. The effective bonding area of W/Cu joints exceed 98 %. The thermal conductivity of W/Cu prepared by casting assisted VHP is 347, 288, and 257 W/m·K at room temperature, 500 °C, and 900 °C, respectively, exceeding that of W/Cu prepared by casting assisted hot isostatic pressing (HIP) at the corresponding temperatures. The heat transfer performance and structural integrity of the prepared divertor mockup remain satisfactory after 1000 cycles at 20 MW/m2, with a peak surface temperature of 725.7 ℃. The proposed method provides a new strategy for preparing high-performance and fatigue resistant W/Cu joints, to address the issues of low bonding performance as well as poor fatigue resistance.http://www.sciencedirect.com/science/article/pii/S2352179125000225W/Cu jointDivertorVacuum hot pressingBonding performanceFatigue resistance |
| spellingShingle | Nanyu Mou Qianqian Lin Mingchi Feng Shuai Huang Le Han Damao Yao A new method for preparing high-quality and fatigue-resistant divertor W/Cu joints Nuclear Materials and Energy W/Cu joint Divertor Vacuum hot pressing Bonding performance Fatigue resistance |
| title | A new method for preparing high-quality and fatigue-resistant divertor W/Cu joints |
| title_full | A new method for preparing high-quality and fatigue-resistant divertor W/Cu joints |
| title_fullStr | A new method for preparing high-quality and fatigue-resistant divertor W/Cu joints |
| title_full_unstemmed | A new method for preparing high-quality and fatigue-resistant divertor W/Cu joints |
| title_short | A new method for preparing high-quality and fatigue-resistant divertor W/Cu joints |
| title_sort | new method for preparing high quality and fatigue resistant divertor w cu joints |
| topic | W/Cu joint Divertor Vacuum hot pressing Bonding performance Fatigue resistance |
| url | http://www.sciencedirect.com/science/article/pii/S2352179125000225 |
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