Superior Plasticity of Silver-Based Composites with Reinforcing Pyrochlore
Silver (Ag) has difficult forming strong bonding with oxides due to its deep d band beneath the Fermi level and completely filled 4d orbital. Thus, it is difficult to fabricate silver-based composites with superior plasticity and processability because of the easy debonding at their interface. Herei...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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MDPI AG
2023-02-01
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| Series: | Metals |
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| Online Access: | https://www.mdpi.com/2075-4701/13/2/325 |
| _version_ | 1797619337170780160 |
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| author | Lingjie Zhang Weiwei Cai Ningzhong Bao Xueyu Geng Hui Yang |
| author_facet | Lingjie Zhang Weiwei Cai Ningzhong Bao Xueyu Geng Hui Yang |
| author_sort | Lingjie Zhang |
| collection | DOAJ |
| description | Silver (Ag) has difficult forming strong bonding with oxides due to its deep d band beneath the Fermi level and completely filled 4d orbital. Thus, it is difficult to fabricate silver-based composites with superior plasticity and processability because of the easy debonding at their interface. Herein, La<sub>2</sub>Sn<sub>2</sub>O<sub>7</sub> pyrochlore was used as a reinforcing phase for a silver matrix. The enhanced interfacial bonding strength of Ag-La<sub>2</sub>Sn<sub>2</sub>O<sub>7</sub> was confirmed both theoretically and experimentally, indicating that Ag could form more localized ionic bonding with La<sub>2</sub>Sn<sub>2</sub>O<sub>7</sub> than with SnO<sub>2</sub>. The superior plasticity was further confirmed for the Ag-La<sub>2</sub>Sn<sub>2</sub>O<sub>7</sub> composite, as the uniform elongation (UE) of the Ag-La<sub>2</sub>Sn<sub>2</sub>O<sub>7</sub> composite was ~19%, i.e., ~14% higher than and 2.8 times that of the conventional Ag-SnO<sub>2</sub> composite. The plasticity enhancement mechanism was also unraveled by calculating the interfacial mobility. This work verified the usefulness of pyrochlore to fabricate silver-based composites with superior plasticity and also provides a new strategy for the construction of advanced silver-based composites for application in the electrical contact field. |
| first_indexed | 2024-03-11T08:25:37Z |
| format | Article |
| id | doaj.art-d539da117f1149c0b95855ae67b5ccf3 |
| institution | Directory Open Access Journal |
| issn | 2075-4701 |
| language | English |
| last_indexed | 2024-03-11T08:25:37Z |
| publishDate | 2023-02-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Metals |
| spelling | doaj.art-d539da117f1149c0b95855ae67b5ccf32023-11-16T22:07:46ZengMDPI AGMetals2075-47012023-02-0113232510.3390/met13020325Superior Plasticity of Silver-Based Composites with Reinforcing PyrochloreLingjie Zhang0Weiwei Cai1Ningzhong Bao2Xueyu Geng3Hui Yang4State Key Laboratory of Silicon Materials, School of Materials Science and Engineering, Zhejiang University, Hangzhou 310058, ChinaState Key Laboratory of Silicon Materials, School of Materials Science and Engineering, Zhejiang University, Hangzhou 310058, ChinaState Key Laboratory of Silicon Materials, School of Materials Science and Engineering, Zhejiang University, Hangzhou 310058, ChinaState Key Laboratory of Silicon Materials, School of Materials Science and Engineering, Zhejiang University, Hangzhou 310058, ChinaState Key Laboratory of Silicon Materials, School of Materials Science and Engineering, Zhejiang University, Hangzhou 310058, ChinaSilver (Ag) has difficult forming strong bonding with oxides due to its deep d band beneath the Fermi level and completely filled 4d orbital. Thus, it is difficult to fabricate silver-based composites with superior plasticity and processability because of the easy debonding at their interface. Herein, La<sub>2</sub>Sn<sub>2</sub>O<sub>7</sub> pyrochlore was used as a reinforcing phase for a silver matrix. The enhanced interfacial bonding strength of Ag-La<sub>2</sub>Sn<sub>2</sub>O<sub>7</sub> was confirmed both theoretically and experimentally, indicating that Ag could form more localized ionic bonding with La<sub>2</sub>Sn<sub>2</sub>O<sub>7</sub> than with SnO<sub>2</sub>. The superior plasticity was further confirmed for the Ag-La<sub>2</sub>Sn<sub>2</sub>O<sub>7</sub> composite, as the uniform elongation (UE) of the Ag-La<sub>2</sub>Sn<sub>2</sub>O<sub>7</sub> composite was ~19%, i.e., ~14% higher than and 2.8 times that of the conventional Ag-SnO<sub>2</sub> composite. The plasticity enhancement mechanism was also unraveled by calculating the interfacial mobility. This work verified the usefulness of pyrochlore to fabricate silver-based composites with superior plasticity and also provides a new strategy for the construction of advanced silver-based composites for application in the electrical contact field.https://www.mdpi.com/2075-4701/13/2/325silver-based compositeplasticityenhanced localizationinterfacial bonding strengthinterfacial mobility |
| spellingShingle | Lingjie Zhang Weiwei Cai Ningzhong Bao Xueyu Geng Hui Yang Superior Plasticity of Silver-Based Composites with Reinforcing Pyrochlore Metals silver-based composite plasticity enhanced localization interfacial bonding strength interfacial mobility |
| title | Superior Plasticity of Silver-Based Composites with Reinforcing Pyrochlore |
| title_full | Superior Plasticity of Silver-Based Composites with Reinforcing Pyrochlore |
| title_fullStr | Superior Plasticity of Silver-Based Composites with Reinforcing Pyrochlore |
| title_full_unstemmed | Superior Plasticity of Silver-Based Composites with Reinforcing Pyrochlore |
| title_short | Superior Plasticity of Silver-Based Composites with Reinforcing Pyrochlore |
| title_sort | superior plasticity of silver based composites with reinforcing pyrochlore |
| topic | silver-based composite plasticity enhanced localization interfacial bonding strength interfacial mobility |
| url | https://www.mdpi.com/2075-4701/13/2/325 |
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