Enhanced Mechanical Properties and Oxidation Resistance of Zirconium Diboride Ceramics via Grain‐Refining and Dislocation Regulation
Abstract Zirconium diboride (ZrB2) is considered as one of the most promising ultra‐high temperature materials for the applications in extreme environments. However, the difficulty in fabrication of ZrB2 limits its industrial applications. In this study, fully dense and grain‐refined ZrB2 is prepare...
| Main Authors: | , , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Wiley
2022-02-01
|
| Series: | Advanced Science |
| Subjects: | |
| Online Access: | https://doi.org/10.1002/advs.202104532 |
| _version_ | 1819289951179636736 |
|---|---|
| author | Haiyue Xu Wei Ji Weiming Guo Yulin Li Ji Zou Weimin Wang Zhengyi Fu |
| author_facet | Haiyue Xu Wei Ji Weiming Guo Yulin Li Ji Zou Weimin Wang Zhengyi Fu |
| author_sort | Haiyue Xu |
| collection | DOAJ |
| description | Abstract Zirconium diboride (ZrB2) is considered as one of the most promising ultra‐high temperature materials for the applications in extreme environments. However, the difficulty in fabrication of ZrB2 limits its industrial applications. In this study, fully dense and grain‐refined ZrB2 is prepared under ultra‐high pressure of 15 GPa at low temperature of 1450 °C. The as‐prepared ZrB2 exhibits excellent mechanical and oxidation‐resistant properties. Compared with raw powder, the grain size decreases 56%. Compared with high‐temperature sintered control specimen beyond 2000 °C, the hardness and fracture toughness increase about 46% and 69%, respectively, the dislocation density increase 3 orders of magnitude, while the grain size considerably decrease 96%. According to work hardening, Hall–Petch and Taylor dislocation hardening effects, the refined grains, substructures, and high dislocation density caused by plastic deformation during sintering can enhance the mechanical properties. The unique structure contributes to a threshold oxidation temperature increase of ≈250 °C relative to the high‐temperature sintered ZrB2, achieving one of the highest values (1100 °C) among the reported monolithic ultra‐high temperature ceramics. A developed densification mechanism of dislocation multiplication with grain refining is proposed and proved to dominate the sintering, which is responsible for simultaneous improvements in mechanical and oxidation‐resistant properties. |
| first_indexed | 2024-12-24T03:15:00Z |
| format | Article |
| id | doaj.art-4b14d44e10b441e2bd3d377e5e07324c |
| institution | Directory Open Access Journal |
| issn | 2198-3844 |
| language | English |
| last_indexed | 2024-12-24T03:15:00Z |
| publishDate | 2022-02-01 |
| publisher | Wiley |
| record_format | Article |
| series | Advanced Science |
| spelling | doaj.art-4b14d44e10b441e2bd3d377e5e07324c2022-12-21T17:17:40ZengWileyAdvanced Science2198-38442022-02-0196n/an/a10.1002/advs.202104532Enhanced Mechanical Properties and Oxidation Resistance of Zirconium Diboride Ceramics via Grain‐Refining and Dislocation RegulationHaiyue Xu0Wei Ji1Weiming Guo2Yulin Li3Ji Zou4Weimin Wang5Zhengyi Fu6State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan 430070 ChinaState Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan 430070 ChinaSchool of Electromechanical Engineering Guangdong University of Technology Guangzhou 510006 ChinaState Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan 430070 ChinaState Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan 430070 ChinaState Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan 430070 ChinaState Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan 430070 ChinaAbstract Zirconium diboride (ZrB2) is considered as one of the most promising ultra‐high temperature materials for the applications in extreme environments. However, the difficulty in fabrication of ZrB2 limits its industrial applications. In this study, fully dense and grain‐refined ZrB2 is prepared under ultra‐high pressure of 15 GPa at low temperature of 1450 °C. The as‐prepared ZrB2 exhibits excellent mechanical and oxidation‐resistant properties. Compared with raw powder, the grain size decreases 56%. Compared with high‐temperature sintered control specimen beyond 2000 °C, the hardness and fracture toughness increase about 46% and 69%, respectively, the dislocation density increase 3 orders of magnitude, while the grain size considerably decrease 96%. According to work hardening, Hall–Petch and Taylor dislocation hardening effects, the refined grains, substructures, and high dislocation density caused by plastic deformation during sintering can enhance the mechanical properties. The unique structure contributes to a threshold oxidation temperature increase of ≈250 °C relative to the high‐temperature sintered ZrB2, achieving one of the highest values (1100 °C) among the reported monolithic ultra‐high temperature ceramics. A developed densification mechanism of dislocation multiplication with grain refining is proposed and proved to dominate the sintering, which is responsible for simultaneous improvements in mechanical and oxidation‐resistant properties.https://doi.org/10.1002/advs.202104532dislocation multiplicationgrain‐refiningoxidation resistanceplastic deformationultra‐high pressure sintering |
| spellingShingle | Haiyue Xu Wei Ji Weiming Guo Yulin Li Ji Zou Weimin Wang Zhengyi Fu Enhanced Mechanical Properties and Oxidation Resistance of Zirconium Diboride Ceramics via Grain‐Refining and Dislocation Regulation Advanced Science dislocation multiplication grain‐refining oxidation resistance plastic deformation ultra‐high pressure sintering |
| title | Enhanced Mechanical Properties and Oxidation Resistance of Zirconium Diboride Ceramics via Grain‐Refining and Dislocation Regulation |
| title_full | Enhanced Mechanical Properties and Oxidation Resistance of Zirconium Diboride Ceramics via Grain‐Refining and Dislocation Regulation |
| title_fullStr | Enhanced Mechanical Properties and Oxidation Resistance of Zirconium Diboride Ceramics via Grain‐Refining and Dislocation Regulation |
| title_full_unstemmed | Enhanced Mechanical Properties and Oxidation Resistance of Zirconium Diboride Ceramics via Grain‐Refining and Dislocation Regulation |
| title_short | Enhanced Mechanical Properties and Oxidation Resistance of Zirconium Diboride Ceramics via Grain‐Refining and Dislocation Regulation |
| title_sort | enhanced mechanical properties and oxidation resistance of zirconium diboride ceramics via grain refining and dislocation regulation |
| topic | dislocation multiplication grain‐refining oxidation resistance plastic deformation ultra‐high pressure sintering |
| url | https://doi.org/10.1002/advs.202104532 |
| work_keys_str_mv | AT haiyuexu enhancedmechanicalpropertiesandoxidationresistanceofzirconiumdiborideceramicsviagrainrefininganddislocationregulation AT weiji enhancedmechanicalpropertiesandoxidationresistanceofzirconiumdiborideceramicsviagrainrefininganddislocationregulation AT weimingguo enhancedmechanicalpropertiesandoxidationresistanceofzirconiumdiborideceramicsviagrainrefininganddislocationregulation AT yulinli enhancedmechanicalpropertiesandoxidationresistanceofzirconiumdiborideceramicsviagrainrefininganddislocationregulation AT jizou enhancedmechanicalpropertiesandoxidationresistanceofzirconiumdiborideceramicsviagrainrefininganddislocationregulation AT weiminwang enhancedmechanicalpropertiesandoxidationresistanceofzirconiumdiborideceramicsviagrainrefininganddislocationregulation AT zhengyifu enhancedmechanicalpropertiesandoxidationresistanceofzirconiumdiborideceramicsviagrainrefininganddislocationregulation |