Design of Ultra-High Temperature Ceramic Nano-Composites from Multi-Scale Length Microstructure Approach
The evolution of the multi-scale microstructure of a (Zr,Ta)B2 solid solution was studied as a function of time and temperature. The ceramics were produced by hot pressing a mixture of ZrB2 with 15 vol% TaSi2 followed by annealing at 2100 °C. Formation of a super-saturated solid solution led to the precipitation of TaC nano-needles within the micron-sized boride grain matrix. Phase stability diagrams were used to define the conditions of partial pressure within the sintering chamber that drove precipitation of nano-inclusions in the form of either metal or carbide. Through this approach, other systems containing various transition metals were explored to design other formulations for in-situ nano-composites with unprecedented strength at ultra-elevated temperatures.
N. Gilli et al., "Design of Ultra-High Temperature Ceramic Nano-Composites from Multi-Scale Length Microstructure Approach," Composites Part B: Engineering, vol. 226, article no. 109344, Elsevier, Dec 2021.
The definitive version is available at https://doi.org/10.1016/j.compositesb.2021.109344
Materials Science and Engineering
Keywords and Phrases
Core-Shell; Electron Microscopy; Interface/Interphase; Nano-Structures; Sintering
International Standard Serial Number (ISSN)
Article - Journal
© 2021 Elsevier, All rights reserved.
01 Dec 2021