Binderless WC with High Strength and Toughness Up to 1500 °C
A tungsten carbide ceramic containing 5 vol% silicon carbide was hot pressed to full density at 1820 °C. A small amount of transient liquid phase based on W-C-Si-O facilitated oxide removal in the reducing environment and favoured the development of a bimodal microstructure containing sub-micrometric grains with square or rod-like morphologies. These microstructural features led to outstanding mechanical properties from room to elevated temperatures. For the first time, WC-materials were characterized up to 1500 °C exhibiting flexural strength over 1 GPa in the whole temperature range and fracture toughness from 7 to 15 MPa·√m.
L. Silvestroni et al., "Binderless WC with High Strength and Toughness Up to 1500 °C," Journal of the European Ceramic Society, vol. 40, no. 6, pp. 2287 - 2294, Elsevier Ltd, Jun 2020.
The definitive version is available at https://doi.org/10.1016/j.jeurceramsoc.2020.01.055
Materials Science and Engineering
Keywords and Phrases
Fracture toughness; Hot pressing; Microstructure; Strength; Tungsten carbide
International Standard Serial Number (ISSN)
Article - Journal
© 2020 Elsevier Ltd, All rights reserved.
01 Jun 2020