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

Makireddi, D and Ghuge, VD and Behera, A and Puri, YM and Thakare, G and Thawre, MM (2023) Enhancing the hardness of alumina-zirconia-CNT composites using alumina-graphite powder bath to provide homogeneous sintering. In: Advances in Applied Ceramics .

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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.

Item Type:	Journal Article
Publication:	Advances in Applied Ceramics
Publisher:	Taylor and Francis Ltd.
Additional Information:	The copyright for this article belongs to Taylor and Francis Ltd.
Keywords:	Aluminum oxide; Cutting tools; Graphite; Hardness; Microstructure; Sintered alumina; Zirconia, Alumina graphites; Alumina-zirconia; Ceramic composites; CNTs composites; Conventional sintering; Cutting edges; Graphite powder; Indirect heating; Powder bath; Sintering methods, Sintering
Department/Centre:	Division of Mechanical Sciences > Mechanical Engineering
Date Deposited:	19 May 2023 10:07
Last Modified:	22 May 2023 06:24
URI:	https://eprints.iisc.ac.in/id/eprint/81588

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