|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||Integrative Materials Design III: Performance and Sustainability
||Cermets as Model Materials for Integrative Materials Design
||Sean Agnew, Liang Dong, Haydn N. G. Wadley
|On-Site Speaker (Planned)
Cermets are introduced as a class of materials ripe for Integrative Materials Design. In this talk, the characterization of large, commercially produced tiles of TixMo1-xC cermets with Ni binder manufactured by self-propagating high temperature synthesis is presented in terms of chemistry, phase composition, microstructure (particle size and contiguity), density, and residual stress. In addition, the mechanical properties are presented. Given the low absolute density (5.5 g/cm3), the compressive strength and fracture toughness values of 2.7 GPa and 16.1 ± 1.7 MPa√m, are impressive. However, the mean 4-point bend strength and Weibull modulus are low (538 ± 109 MPa and 6.3). These disparate properties are reconciled in terms of two characteristics of the microstructure: random occurrence of large pockets of insufficient binder (shrinkage porosity) and high contiguity. The implications for microstructure optimization (design) are discussed in light of available micromechanical models of cermet behavior.
||Planned: Supplemental Proceedings volume