Enhancing the hardness of alumina-zirconia-CNT composites using alumina-graphite powder bath to provide homogeneous sintering

IF 1.3 4区材料科学 Q3 MATERIALS SCIENCE, CERAMICS Advances in Applied Ceramics Pub Date : 2023-02-17 DOI:10.1080/17436753.2023.2199554

Diwakar Makireddi, V. D. Ghuge, Alok Behera, Y. Puri, G. Thakare, M. M. Thawre

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Abstract

ABSTRACT Using a conventional sintering (CS) process, it is difficult to eliminate pore distribution across ceramic composites, resulting in mechanical properties destruction. In this study, 90%–95% of pores were reduced with the same sintering parameters by replacing CS with the cutting-edge Alumina-Graphite Powder Bath (AGPB) sintering method. Alumina-Zirconia-CNT(AZC) composites were fabricated using both AGPB and CS methods. The ceramic samples were surrounded by alumina-graphite powder particles in the AGPB method, which provided indirect homogeneous heating to the samples. This powder bath setup changed convection-radiation heat to conduction heat and produced sintered product with pore-free microstructures. The hardness of the AGPB-AZC composite was 43% higher than the CS-AZC, demonstrating the exponential property enhancement caused by cutting-edge AGPB sintering. The AGPB-AZC FESEM investigation revealed the formation of a homogenous microstructure with minimum pores, which eventually increased the hardness.

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采用氧化铝-石墨粉末浴烧结，提高了氧化铝-氧化锆-碳纳米管复合材料的硬度

传统的烧结(CS)工艺难以消除陶瓷复合材料的孔隙分布，导致其力学性能受到破坏。在本研究中，用先进的氧化铝-石墨粉浴(AGPB)烧结方法代替CS，在相同的烧结参数下，气孔减少了90%-95%。采用AGPB法和CS法制备了氧化铝-氧化锆-碳纳米管(AZC)复合材料。在AGPB法中，陶瓷样品被氧化铝-石墨粉末颗粒包围，为样品提供了间接均匀加热。这种粉末浴装置将对流辐射热转变为导热，并生产出无孔微观结构的烧结产品。AGPB- azc复合材料的硬度比CS-AZC高43%，显示了AGPB尖端烧结带来的指数级性能增强。AGPB-AZC FESEM分析表明，该材料形成了均匀的微观结构，气孔最小，最终提高了硬度。

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来源期刊

Advances in Applied Ceramics 工程技术-材料科学：硅酸盐

CiteScore

4.40

自引率

4.50%

发文量

审稿时长

5.2 months

期刊介绍： Advances in Applied Ceramics: Structural, Functional and Bioceramics provides international coverage of high-quality research on functional ceramics, engineering ceramics and bioceramics.