原位生成SiC晶须提高Al2O3-SiC-C浇注料的抗热震性

IF 2.2 4区材料科学 Q2 MATERIALS SCIENCE, CERAMICS

Journal of Asian Ceramic Societies Pub Date : 2022-12-08 DOI:10.1080/21870764.2022.2155341

L. Wen, J. Nie, Haoran Dong, Maoqi Ju, Y. Liang, M. Cai

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引用次数: 1

摘要

对具有优异强度和抗热震性的Al2O3-SiC-C浇注料(ASCs)的需求已经大大增加。本文研究了Fe-Si3N4对ASCs抗热震性和物理性能的影响。在ASCs中加入Fe-Si3N4可形成SiC晶须，提高浇注料的冷断裂模量和冷破碎强度。在1450℃加热3 h后，形成的SiC可以填充碳氧化留下的孔隙，从而提高浇注料的堆积密度。此外，三次热冲击循环后浇注料的残余强度比有所提高，这是由于N2的释放和晶须的产生导致微裂纹的产生。Fe-Si3N4的最佳含量为4 wt%。因此，本研究结果表明，添加Fe-Si3N4可以增强ASCs的抗热震性和物理性能。

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Enhancing the thermal shock resistance of Al2O3-SiC-C castables via the generation of in-situ SiC whiskers

ABSTRACT The demand for Al2O3-SiC-C castables (ASCs) with excellent strength and thermal shock resistance has expanded considerably. Here, the effects of Fe-Si3N4 on the thermal shock resistance and physical properties of ASCs were studied. The addition of Fe-Si3N4 to ASCs lead to the formation of SiC whiskers, enhancing the cold modulus of rupture and the cold crushing strength of the castables. The formed SiC can fill the pores left by the oxidation of carbon after heating at 1450°C for 3 h, thereby improving the bulk density of the castables. Additionally, the residual strength ratio of the castables after three thermal shock cycles was improved and this was attributed to the generation of microcracks due to the release of N2 and the generation of the whiskers. The optimal Fe-Si3N4 content was 4 wt%. Therefore, the results of this study revealed that the thermal shock resistance and physical properties of ASCs were enhanced by the addition of Fe-Si3N4.

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来源期刊

Journal of Asian Ceramic Societies Materials Science-Ceramics and Composites

CiteScore

5.00

自引率

4.30%

发文量

审稿时长

10 weeks

期刊介绍： The Journal of Asian Ceramic Societies is an open access journal publishing papers documenting original research and reviews covering all aspects of science and technology of Ceramics, Glasses, Composites, and related materials. These papers include experimental and theoretical aspects emphasizing basic science, processing, microstructure, characteristics, and functionality of ceramic materials. The journal publishes high quality full papers, letters for rapid publication, and in-depth review articles. All papers are subjected to a fair peer-review process.