2D MXenes Ultra-high Temperature Materials for Hypersonic Systems
Abstract
2D MXenes Ultra-high Temperature Materials for Hypersonic SystemsBabak Anasori, Indiana University-Purdue University IndianapolisPro ject Summary (Approved for Public Release):The continued primacy of the U.S. Naval research in the modern age depends on the leaders hip 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 improvements have been made in these composites, most of these changes are incrementalmodificati ons, and UHTCcomposites still suffer from low thermal shock resistance, fracture toughness, adjoining eutectic formation,and oxidati on. In this project, we aim to take a leap forward in UHTC hypersonicmaterials through the design and use of the large family of two -dimensional (2D) transition metal carbides, called MXenes, as an additive material to UHTCs. MXenes are inherently 2D one-nanometer -thick UHTC materials, with reactive surfaces and a broad selection of atomic compositions toward tailored bond formation with UHTCs grains, which promote lower temperature processing of UHTC composites. Additionally, MXenes have the highest elastic modulus and el ectrical conductivity amongst solution-processed 2D materials which can be made in large quantities. While mechanically rigid, MXene s 2D flexible nature allows encapsulation of grains of other UHTCs. MXenes mechanical properties combined with their nanolayered 2 D forms and ability to control the strength of bonding at the interfaces promote UHTC composites with high strengths andtoughness wh ich can withstand the extreme thermal shocks in hypersonic travel. Additionally, with precise control over MXenes compositions, we c an add desired elements at the dopant level to UHTCs to further enhance their oxidation properties. MXenes in UHTCs will open an unc harted territory in the design of UHTC interfaces and grain boundaries at the atomic level through the control of atomic bonding bet ween grains. This study will result in the fundamental understanding of composite interfaces, mechanical properties andoxidation sta bility, which will assist in the design of large-scale manufacturable UHTC composites in future hypersonic applications. This projec t is the first step in revolutionizing the material possibilities of the hypersonic systems through the creation of UHTC composites reinforced with 2D UHTC MXenes.
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- Aug 20, 2021
- Source ID
- N000142112799
Entities
People
- Babak Anasori
Organizations
- Indiana University
- Office of Naval Research
- United States Navy