Effects of AlN addition on the reactive sintering behavior and comprehensive properties of h-BN/ZrO2 composites prepared by spark plasma sintering
The h-BN/ZrO2 composites for preparing ceramic side sealing plate were obtained with spark plasma sintering (SPS) at 1700 °C for 10 min in the study. By varying AlN content from 0 to 20 wt%, we systematically explored its influence on sintering behavior, microstructure evolution, mechanical performa...
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Elsevier
2025-06-01
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| Series: | Materials & Design |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S0264127525004617 |
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| author | Yuannong Qu Ji Zou Weimin Wang Wei Ji Zhengyi Fu |
| author_facet | Yuannong Qu Ji Zou Weimin Wang Wei Ji Zhengyi Fu |
| author_sort | Yuannong Qu |
| collection | DOAJ |
| description | The h-BN/ZrO2 composites for preparing ceramic side sealing plate were obtained with spark plasma sintering (SPS) at 1700 °C for 10 min in the study. By varying AlN content from 0 to 20 wt%, we systematically explored its influence on sintering behavior, microstructure evolution, mechanical performance, and corrosion mechanism at1600 °C. Results show that the rapid heating and uniaxial pressure during SPS and the in-situ reactions between AlN and ZrO2 promoted the densification of composites. The main reaction products were ZrN, which acted as an effective oxygen scavenger, consuming dissolved oxygen ([O]) and converting into ZrO2. These newly formed ZrO2 particles filled residual porosity within the matrix and nucleated around pre-existing ZrO2 grains, progressively coalescing into continuous Zr-rich barrier layer.Thereby preventing molten steel from further penetrating into the matrix. The corrosion depth of the composite with 5 wt% AlN content in molten steel at 1600 °C after 2 h was only 69 μm. Meanwhile, it showed a thermal conductivity of 25 W m−1 K−1 and a coefficient of thermal expansion of 3.7 × 10-6 K−1, demonstrating excellent thermal shock resistance. The composites are expected to be used to manufacture side sealing plates for the novel continuous casting of thin strip. |
| format | Article |
| id | doaj-art-0cc928451bc54dd8afacd0545e3e5960 |
| institution | Kabale University |
| issn | 0264-1275 |
| language | English |
| publishDate | 2025-06-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Materials & Design |
| spelling | doaj-art-0cc928451bc54dd8afacd0545e3e59602025-08-20T03:46:47ZengElsevierMaterials & Design0264-12752025-06-0125411404110.1016/j.matdes.2025.114041Effects of AlN addition on the reactive sintering behavior and comprehensive properties of h-BN/ZrO2 composites prepared by spark plasma sinteringYuannong Qu0Ji Zou1Weimin Wang2Wei Ji3Zhengyi Fu4Hubei Longzhong Laboratory, Wuhan University of Technology Xiangyang Demonstration Zone, Xiangyang, China; State 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, ChinaHubei Longzhong Laboratory, Wuhan University of Technology Xiangyang Demonstration Zone, Xiangyang, China; State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan 430070, China; Corresponding authors at: Hubei Longzhong Laboratory, Wuhan University of Technology Xiangyang Demonstration Zone, Xiangyang, China.Hubei Longzhong Laboratory, Wuhan University of Technology Xiangyang Demonstration Zone, Xiangyang, China; State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan 430070, China; Corresponding authors at: Hubei Longzhong Laboratory, Wuhan University of Technology Xiangyang Demonstration Zone, Xiangyang, China.The h-BN/ZrO2 composites for preparing ceramic side sealing plate were obtained with spark plasma sintering (SPS) at 1700 °C for 10 min in the study. By varying AlN content from 0 to 20 wt%, we systematically explored its influence on sintering behavior, microstructure evolution, mechanical performance, and corrosion mechanism at1600 °C. Results show that the rapid heating and uniaxial pressure during SPS and the in-situ reactions between AlN and ZrO2 promoted the densification of composites. The main reaction products were ZrN, which acted as an effective oxygen scavenger, consuming dissolved oxygen ([O]) and converting into ZrO2. These newly formed ZrO2 particles filled residual porosity within the matrix and nucleated around pre-existing ZrO2 grains, progressively coalescing into continuous Zr-rich barrier layer.Thereby preventing molten steel from further penetrating into the matrix. The corrosion depth of the composite with 5 wt% AlN content in molten steel at 1600 °C after 2 h was only 69 μm. Meanwhile, it showed a thermal conductivity of 25 W m−1 K−1 and a coefficient of thermal expansion of 3.7 × 10-6 K−1, demonstrating excellent thermal shock resistance. The composites are expected to be used to manufacture side sealing plates for the novel continuous casting of thin strip.http://www.sciencedirect.com/science/article/pii/S0264127525004617h-BN/ZrO2 compositeSide sealing plateZirconium nitrideCorrosion resistance |
| spellingShingle | Yuannong Qu Ji Zou Weimin Wang Wei Ji Zhengyi Fu Effects of AlN addition on the reactive sintering behavior and comprehensive properties of h-BN/ZrO2 composites prepared by spark plasma sintering Materials & Design h-BN/ZrO2 composite Side sealing plate Zirconium nitride Corrosion resistance |
| title | Effects of AlN addition on the reactive sintering behavior and comprehensive properties of h-BN/ZrO2 composites prepared by spark plasma sintering |
| title_full | Effects of AlN addition on the reactive sintering behavior and comprehensive properties of h-BN/ZrO2 composites prepared by spark plasma sintering |
| title_fullStr | Effects of AlN addition on the reactive sintering behavior and comprehensive properties of h-BN/ZrO2 composites prepared by spark plasma sintering |
| title_full_unstemmed | Effects of AlN addition on the reactive sintering behavior and comprehensive properties of h-BN/ZrO2 composites prepared by spark plasma sintering |
| title_short | Effects of AlN addition on the reactive sintering behavior and comprehensive properties of h-BN/ZrO2 composites prepared by spark plasma sintering |
| title_sort | effects of aln addition on the reactive sintering behavior and comprehensive properties of h bn zro2 composites prepared by spark plasma sintering |
| topic | h-BN/ZrO2 composite Side sealing plate Zirconium nitride Corrosion resistance |
| url | http://www.sciencedirect.com/science/article/pii/S0264127525004617 |
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