Design of Ultra-High Temperature Ceramic Nano-Composites from Multi-Scale Length Microstructure Approach
Abstract
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.
Recommended Citation
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
Department(s)
Materials Science and Engineering
Keywords and Phrases
Core-Shell; Electron Microscopy; Interface/Interphase; Nano-Structures; Sintering
International Standard Serial Number (ISSN)
1359-8368
Document Type
Article - Journal
Document Version
Citation
File Type
text
Language(s)
English
Rights
© 2021 Elsevier, All rights reserved.
Publication Date
01 Dec 2021
Comments
This research was partially sponsored by the NATO Science for Peace and Security Programme under grant MYP-G5767 (SUSPENCE) and by the US AFOSR through the Cooperative Agreement no. FA9550-21-1-0399 (NACREOUS) with Dr. Ming-Jen Pan as contract monitor.