In-situ High-Temperature X-ray Diffraction of Ultra-High Temperature Ceramics
Abstract
The continued primacy of the U.S. Naval research in the modern age depends on the leadership of the U.S. in hypersonic systems. Such, systems rely on ultra-high temperature ceramics (UHTCs) to withstand extreme temperatures at hypersonic travel speeds. While improv,ements have been made in these systems, most of these changes are incremental modifications, and UHTC materials still suffer from lo,w thermal shock resistance, fracture toughness, adjoining eutectic formation, and oxidation. A leap forward in UHTC hypersonic mater,ials is possible by the use of 1-nm-thick 2D sheets of transition metal carbide MXenes as an additive material to UHTCs. This ongoin,g ambitious project aims to systematically study the MXenes interaction with UHTC diborides to form new interfaces and the MXene-UHT,C interfaces evolution during the sintering conditions from 300 ?C to 2000 ?C. It also aims to investigate the stability and oxidati,on of these MXenes-UHTCs structures. While ex-situ characterizations are being used to understand the resulting interfaces and compo,sitions, the addition of in-situ high-temperature (up to 2300 ?C) x-ray diffraction (XRD) significantly enhances the breadth of the,fundamental understanding of this novel MXene-UHTC system. In this project, we aim to add a 2300 ?C hot stage in our XRD, which enab,les in-situ high-temperature studies of UHTC materials with the XRD two-dimensional detector in air, inert gases, and vacuum enviro,nment. This in-situ hot stage capability will result in the fundamental understanding of the onset temperatures of interface reactio,ns and phase transformations, resulting compositions, and oxidation stability, which will assist in the design of large-scale manufa,cturable UHTCs in future hypersonic applications.
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- Dec 06, 2022
- Source ID
- N000142312097
Entities
People
- Babak Anasori
Organizations
- Indiana University
- Office of Naval Research
- United States Navy