|About this Abstract
||2020 TMS Annual Meeting & Exhibition
||Characterization of Minerals, Metals and Materials
||Unravel the Structure of a Ti-TiB-TiC Intergrowth Phase: a Coupled Ab-initio/HRTEM Investigation
||Qi An, Lujun Huang, Shaolou Wei, Atieh Moridi, Lin Geng
|On-Site Speaker (Planned)
As typical reinforcers to improve the mechanical performances and physicochemical stability of metallic alloys, TiC and TiB have demonstrated promising engineering application and stimulated broad research interest. Especially in titanium alloys, due to technological importance, appreciable effort has been devoted to optimizing their volumetric content and thereby spatial distribution, however, leaving behind the corresponding interfacial structure and property less explored and elusive. In this presentation, by exploiting a TiB+TiC reinforced Ti-alloy as a model system, we report a unique Ti-TiB-TiC intergrowth structure. With the aid of ab-initio modelling and high-resolution transmission electron microscopy (HRTEM), we will demonstrate that the interfacial characteristics of this Ti-TiB-TiC intergrowth phase can be quantitatively revealed. We will systemically discuss: (i) what kind of crystallographic orientation relation presents? (ii) what are the interfacial defect configurations? and (iii) what thermodynamic/kinetic parameters dominate the formation of this unique structure?