|About this Abstract
||MS&T21: Materials Science & Technology
||Advanced Characterization of Materials for Nuclear, Radiation, and Extreme Environments
||High Temperature Mechanical Properties of WC/W2C Composites Fabricated by Reactive Sintering of Powders Colloidally Processed
||Antonio Javier Sanchez-Herencia, Macarena Garcia-Ayala, Sandra Tarancon, Begoņa Ferrari, Jose Ygnacio Pastor
|On-Site Speaker (Planned)
||Antonio Javier Sanchez-Herencia
Fusion and fission reactors require of new materials that could withstand severe conditions of temperature and neutronic damage. Tungsten carbide is proposed as an alternative to high temperature service due to its dimensional stability and resistance. But fracture toughness of binderless tungsten carbide is still low. In this work all ceramic composite materials of carbide (WC) and semicarbide (W2C) are obtained after SPS sintering of WC/W powders with volume ratios of 100/0, 90/10, 20/80 and 50/50. Mixture of powders is achieved by colloidal processing methods. WC/W2C composites were mechanically test in bending at temperatures from 600 at 1200 ēC under vacuum conditions similar to a fusion reactor. Results shows that composites behave as elastic ceramics with brittle fracture up to 1000 ēC. Indicating a self-reinforcement mechanism based on the transformation of the W2C phase.