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Effect of nano-TiB2 addition on the microstructure, mechanical properties and machining performance of TiCN cermet

Effect of nano-TiB2 addition on the microstructure, mechanical properties and machining... Titanium carbonitride (TiCN)-based cermets containing different percentages of nano-TiB2, along with other secondary carbides like WC and Cr3C2, were fabricated by spark plasma sintering (SPS). The nano-TiB2 content was varied from 5 to 15 wt.%. Microstructural characterisation was done using a scanning electron microscope (SEM) for comparison studies. The new phases that were formed due to the chemical reaction between the base powders after SPS were identified by X-ray diffraction. Specific mechanical properties like hardness and fracture toughness were measured. The finished TiCN cermet with 15 wt.% nano-TiB2 displayed a balanced improvement in hardness and toughness. The tools developed from the cermet pieces were used for turning EN24 workpiece material, and the machining performance of the tools was assessed. In this study, it was found that a cermet with 15 wt.% nano-TiB2 addition, along with other secondary carbides like WC and Cr3C2, gives rise to minimal surface roughness compared with other cermets. During machining, at high cutting speeds, the cutting force was minimum for a cermet tool with 10 wt.% nano-TiB2 addition. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Journal of the Australian Ceramic Society Springer Journals

Effect of nano-TiB2 addition on the microstructure, mechanical properties and machining performance of TiCN cermet

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References (38)

Publisher
Springer Journals
Copyright
Copyright © 2018 by Australian Ceramic Society
Subject
Materials Science; Ceramics, Glass, Composites, Natural Materials; Materials Engineering; Inorganic Chemistry
ISSN
2510-1560
eISSN
2510-1579
DOI
10.1007/s41779-018-0185-4
Publisher site
See Article on Publisher Site

Abstract

Titanium carbonitride (TiCN)-based cermets containing different percentages of nano-TiB2, along with other secondary carbides like WC and Cr3C2, were fabricated by spark plasma sintering (SPS). The nano-TiB2 content was varied from 5 to 15 wt.%. Microstructural characterisation was done using a scanning electron microscope (SEM) for comparison studies. The new phases that were formed due to the chemical reaction between the base powders after SPS were identified by X-ray diffraction. Specific mechanical properties like hardness and fracture toughness were measured. The finished TiCN cermet with 15 wt.% nano-TiB2 displayed a balanced improvement in hardness and toughness. The tools developed from the cermet pieces were used for turning EN24 workpiece material, and the machining performance of the tools was assessed. In this study, it was found that a cermet with 15 wt.% nano-TiB2 addition, along with other secondary carbides like WC and Cr3C2, gives rise to minimal surface roughness compared with other cermets. During machining, at high cutting speeds, the cutting force was minimum for a cermet tool with 10 wt.% nano-TiB2 addition.

Journal

Journal of the Australian Ceramic SocietySpringer Journals

Published: Apr 24, 2018

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