Synthesis and Characterization of Medium‐/High‐Entropy M2SnC (M=Ti/V/Nb/Zr/Hf) MAX Phases
Entropy stabilization is an effective method to design and explore MAX phases with outstanding properties via tuning constituent elements and crystal structures, which have received considerable critical attention. Currently, some medium‐/high‐entropy (ME/HE) MAX phases, whose A layers are composed...
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| Format: | Article |
| Language: | English |
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Wiley-VCH
2023-01-01
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| Series: | Small Structures |
| Subjects: | |
| Online Access: | https://doi.org/10.1002/sstr.202200161 |
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| author | Lu Chen Youbing Li Ke Chen Xiaojing Bai Mian Li Shiyu Du Zhifang Chai Qing Huang |
| author_facet | Lu Chen Youbing Li Ke Chen Xiaojing Bai Mian Li Shiyu Du Zhifang Chai Qing Huang |
| author_sort | Lu Chen |
| collection | DOAJ |
| description | Entropy stabilization is an effective method to design and explore MAX phases with outstanding properties via tuning constituent elements and crystal structures, which have received considerable critical attention. Currently, some medium‐/high‐entropy (ME/HE) MAX phases, whose A layers are composed of Al, S, and magnetic elements, are reported, while few discussions about ME/HE‐MAX phases with other A elements (e.g., Sn) are conducted. Herein, fully dense ME/HE‐MAX phase bulks ((TiVNb)2SnC, (TiVNbZr)2SnC, and (TiVNbZrHf)2SnC) are designed and synthesized because of the chemical diversity of MAX phases. The results of Rietveld refinement of X‐ray diffraction, scanning electron microscopy, and high‐resolution scanning transmission electron microscopy‐affiliated energy‐dispersive spectrometer analysis comprehensively verify the crystal structure of ME/HE‐MAX phases. Both the electrical conductivity and the charge carrier mobility are significantly lower than the reported correlation ternary MAX phases, due to the electron scattering and structural defects in ME/HE‐MAX phase crystal structures. Similarly, the electron contribution of thermal conductivity is gradually declining; on the contrary, the phonon plays an increasingly dominant role as temperature increases. Owing to the richness in composition of MAX phases, herein, a composition design route for discovering new MAX phases and tuning their properties is indicated. |
| first_indexed | 2024-03-12T21:51:42Z |
| format | Article |
| id | doaj.art-ea81cb67947f4d42a4517b2d81c59bad |
| institution | Directory Open Access Journal |
| issn | 2688-4062 |
| language | English |
| last_indexed | 2024-03-12T21:51:42Z |
| publishDate | 2023-01-01 |
| publisher | Wiley-VCH |
| record_format | Article |
| series | Small Structures |
| spelling | doaj.art-ea81cb67947f4d42a4517b2d81c59bad2023-07-26T01:40:35ZengWiley-VCHSmall Structures2688-40622023-01-0141n/an/a10.1002/sstr.202200161Synthesis and Characterization of Medium‐/High‐Entropy M2SnC (M=Ti/V/Nb/Zr/Hf) MAX PhasesLu Chen0Youbing Li1Ke Chen2Xiaojing Bai3Mian Li4Shiyu Du5Zhifang Chai6Qing Huang7Engineering Laboratory of Advanced Energy Materials Ningbo Institute of Materials Technology and Engineering Chinese Academy of Sciences Ningbo Zhejiang 315201 ChinaEngineering Laboratory of Advanced Energy Materials Ningbo Institute of Materials Technology and Engineering Chinese Academy of Sciences Ningbo Zhejiang 315201 ChinaEngineering Laboratory of Advanced Energy Materials Ningbo Institute of Materials Technology and Engineering Chinese Academy of Sciences Ningbo Zhejiang 315201 ChinaSchool of Materials Science and Engineering Anyang Institute of Technology Anyang 455000 ChinaEngineering Laboratory of Advanced Energy Materials Ningbo Institute of Materials Technology and Engineering Chinese Academy of Sciences Ningbo Zhejiang 315201 ChinaEngineering Laboratory of Advanced Energy Materials Ningbo Institute of Materials Technology and Engineering Chinese Academy of Sciences Ningbo Zhejiang 315201 ChinaEngineering Laboratory of Advanced Energy Materials Ningbo Institute of Materials Technology and Engineering Chinese Academy of Sciences Ningbo Zhejiang 315201 ChinaEngineering Laboratory of Advanced Energy Materials Ningbo Institute of Materials Technology and Engineering Chinese Academy of Sciences Ningbo Zhejiang 315201 ChinaEntropy stabilization is an effective method to design and explore MAX phases with outstanding properties via tuning constituent elements and crystal structures, which have received considerable critical attention. Currently, some medium‐/high‐entropy (ME/HE) MAX phases, whose A layers are composed of Al, S, and magnetic elements, are reported, while few discussions about ME/HE‐MAX phases with other A elements (e.g., Sn) are conducted. Herein, fully dense ME/HE‐MAX phase bulks ((TiVNb)2SnC, (TiVNbZr)2SnC, and (TiVNbZrHf)2SnC) are designed and synthesized because of the chemical diversity of MAX phases. The results of Rietveld refinement of X‐ray diffraction, scanning electron microscopy, and high‐resolution scanning transmission electron microscopy‐affiliated energy‐dispersive spectrometer analysis comprehensively verify the crystal structure of ME/HE‐MAX phases. Both the electrical conductivity and the charge carrier mobility are significantly lower than the reported correlation ternary MAX phases, due to the electron scattering and structural defects in ME/HE‐MAX phase crystal structures. Similarly, the electron contribution of thermal conductivity is gradually declining; on the contrary, the phonon plays an increasingly dominant role as temperature increases. Owing to the richness in composition of MAX phases, herein, a composition design route for discovering new MAX phases and tuning their properties is indicated.https://doi.org/10.1002/sstr.202200161electrical propertieshigh entropiesMAX phasesthermal properties |
| spellingShingle | Lu Chen Youbing Li Ke Chen Xiaojing Bai Mian Li Shiyu Du Zhifang Chai Qing Huang Synthesis and Characterization of Medium‐/High‐Entropy M2SnC (M=Ti/V/Nb/Zr/Hf) MAX Phases Small Structures electrical properties high entropies MAX phases thermal properties |
| title | Synthesis and Characterization of Medium‐/High‐Entropy M2SnC (M=Ti/V/Nb/Zr/Hf) MAX Phases |
| title_full | Synthesis and Characterization of Medium‐/High‐Entropy M2SnC (M=Ti/V/Nb/Zr/Hf) MAX Phases |
| title_fullStr | Synthesis and Characterization of Medium‐/High‐Entropy M2SnC (M=Ti/V/Nb/Zr/Hf) MAX Phases |
| title_full_unstemmed | Synthesis and Characterization of Medium‐/High‐Entropy M2SnC (M=Ti/V/Nb/Zr/Hf) MAX Phases |
| title_short | Synthesis and Characterization of Medium‐/High‐Entropy M2SnC (M=Ti/V/Nb/Zr/Hf) MAX Phases |
| title_sort | synthesis and characterization of medium high entropy m2snc m ti v nb zr hf max phases |
| topic | electrical properties high entropies MAX phases thermal properties |
| url | https://doi.org/10.1002/sstr.202200161 |
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