Wetting and brazing of (HfTaZrNbTi)B2 and (HfTaZrNbTi)C High-Entropy Ceramics by AgCuTi filler
The wetting behaviour of (HfTaZrNbTi)B₂ high entropy boride (HEB) and (HfTaZrNbTi)C high-entropy carbide (HEC) with molten Cu and AgCuTi alloy was investigated via the sessile drop method under an Ar/H2 atmosphere. Pure Cu exhibited non-reactive wetting with contact angles ∼ 120° on HEB and ∼ 126° o...
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| Language: | English |
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Elsevier
2025-06-01
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| Series: | Open Ceramics |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2666539525000598 |
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| author | Naser Hosseini Fabrizio Valenza Zdeněk Chlup Sofia Gambaro Carla Malinverni Valentina Casalegno Alexandra Kovalčíková Monika Tatarková Ivo Dlouhý Peter Tatarko |
| author_facet | Naser Hosseini Fabrizio Valenza Zdeněk Chlup Sofia Gambaro Carla Malinverni Valentina Casalegno Alexandra Kovalčíková Monika Tatarková Ivo Dlouhý Peter Tatarko |
| author_sort | Naser Hosseini |
| collection | DOAJ |
| description | The wetting behaviour of (HfTaZrNbTi)B₂ high entropy boride (HEB) and (HfTaZrNbTi)C high-entropy carbide (HEC) with molten Cu and AgCuTi alloy was investigated via the sessile drop method under an Ar/H2 atmosphere. Pure Cu exhibited non-reactive wetting with contact angles ∼ 120° on HEB and ∼ 126° on HEC. In contrast, AgCuTi alloy showed strong reactive wetting (contact angle ≤ 17°), primarily driven by reactive Ti. The reaction layer was notably thicker for the HEC/AgCuTi system. Due to the better wetting behaviour and high-temperature interactions with the ceramic substrates, AgCuTi alloy was employed as a filler to braze HEB and HEC using pressure-less Field Assisted Sintering Technique (FAST). The resulting joints demonstrated high apparent shear strength of 176 ± 39 MPa for HEC and 116 ± 38 MPa for HEB, exceeding the strength of the base materials in both cases. |
| format | Article |
| id | doaj-art-917d1bf035d54cd1afbccd307c99a284 |
| institution | Kabale University |
| issn | 2666-5395 |
| language | English |
| publishDate | 2025-06-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Open Ceramics |
| spelling | doaj-art-917d1bf035d54cd1afbccd307c99a2842025-08-20T03:45:28ZengElsevierOpen Ceramics2666-53952025-06-012210079210.1016/j.oceram.2025.100792Wetting and brazing of (HfTaZrNbTi)B2 and (HfTaZrNbTi)C High-Entropy Ceramics by AgCuTi fillerNaser Hosseini0Fabrizio Valenza1Zdeněk Chlup2Sofia Gambaro3Carla Malinverni4Valentina Casalegno5Alexandra Kovalčíková6Monika Tatarková7Ivo Dlouhý8Peter Tatarko9Institute of Inorganic Chemistry, Slovak Academy of Sciences, Dúbravská cesta 9, 845 36 Bratislava, SlovakiaInstitute of Condensed Matter Chemistry and Technologies for Energy - ICMATE, National Research Council –CNR, Via De Marini 6, 16149 Genoa, ItalyInstitute of Physics of Materials, Czech Academy of Sciences, Žižkova 22, 616 00 Brno, Czech RepublicInstitute of Condensed Matter Chemistry and Technologies for Energy - ICMATE, National Research Council –CNR, Via De Marini 6, 16149 Genoa, ItalyPolitecnico di Torino, Department of Applied Science and Technology, Corso Duca degli Abruzzi 24, 10129 Torino, ItalyPolitecnico di Torino, Department of Applied Science and Technology, Corso Duca degli Abruzzi 24, 10129 Torino, ItalyInstitute of Materials Research, Slovak Academy of Sciences, Watsonova 47, 04001 Košice, SlovakiaInstitute of Inorganic Chemistry, Slovak Academy of Sciences, Dúbravská cesta 9, 845 36 Bratislava, SlovakiaInstitute of Physics of Materials, Czech Academy of Sciences, Žižkova 22, 616 00 Brno, Czech RepublicInstitute of Inorganic Chemistry, Slovak Academy of Sciences, Dúbravská cesta 9, 845 36 Bratislava, SlovakiaThe wetting behaviour of (HfTaZrNbTi)B₂ high entropy boride (HEB) and (HfTaZrNbTi)C high-entropy carbide (HEC) with molten Cu and AgCuTi alloy was investigated via the sessile drop method under an Ar/H2 atmosphere. Pure Cu exhibited non-reactive wetting with contact angles ∼ 120° on HEB and ∼ 126° on HEC. In contrast, AgCuTi alloy showed strong reactive wetting (contact angle ≤ 17°), primarily driven by reactive Ti. The reaction layer was notably thicker for the HEC/AgCuTi system. Due to the better wetting behaviour and high-temperature interactions with the ceramic substrates, AgCuTi alloy was employed as a filler to braze HEB and HEC using pressure-less Field Assisted Sintering Technique (FAST). The resulting joints demonstrated high apparent shear strength of 176 ± 39 MPa for HEC and 116 ± 38 MPa for HEB, exceeding the strength of the base materials in both cases.http://www.sciencedirect.com/science/article/pii/S2666539525000598High-entropy ceramicsWettingBrazingAgCuTi alloy |
| spellingShingle | Naser Hosseini Fabrizio Valenza Zdeněk Chlup Sofia Gambaro Carla Malinverni Valentina Casalegno Alexandra Kovalčíková Monika Tatarková Ivo Dlouhý Peter Tatarko Wetting and brazing of (HfTaZrNbTi)B2 and (HfTaZrNbTi)C High-Entropy Ceramics by AgCuTi filler Open Ceramics High-entropy ceramics Wetting Brazing AgCuTi alloy |
| title | Wetting and brazing of (HfTaZrNbTi)B2 and (HfTaZrNbTi)C High-Entropy Ceramics by AgCuTi filler |
| title_full | Wetting and brazing of (HfTaZrNbTi)B2 and (HfTaZrNbTi)C High-Entropy Ceramics by AgCuTi filler |
| title_fullStr | Wetting and brazing of (HfTaZrNbTi)B2 and (HfTaZrNbTi)C High-Entropy Ceramics by AgCuTi filler |
| title_full_unstemmed | Wetting and brazing of (HfTaZrNbTi)B2 and (HfTaZrNbTi)C High-Entropy Ceramics by AgCuTi filler |
| title_short | Wetting and brazing of (HfTaZrNbTi)B2 and (HfTaZrNbTi)C High-Entropy Ceramics by AgCuTi filler |
| title_sort | wetting and brazing of hftazrnbti b2 and hftazrnbti c high entropy ceramics by agcuti filler |
| topic | High-entropy ceramics Wetting Brazing AgCuTi alloy |
| url | http://www.sciencedirect.com/science/article/pii/S2666539525000598 |
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