Degradation of Ultra High Temperature Materials under Extreme Conditions
Abstract
Ultra-high temperature ceramics, such as hafnium carbide (HfC) and its composites with tantalum carbide (TaC), are considered protec,tive coatings in aero-propulsion, atmospheric re-entry, and hypersonic applications. However, the behavior of HfC and HfC-TaC materi,als are unreliable and unpredictable due to uncontrolled oxidation and degradation processes occurring under extreme conditions. Thi,s proposal aims to investigate the formation and degradation of HfC and HfC-TaC materials in harsh conditions such as rapid thermal,cycles as well as proton, electron, or ultraviolet irradiation. The proposed research will use novel high-temperature processing met,hods, measurement approaches, and irradiation sources available at A. Alikhanyan National Science Laboratory (AANL) and A. Nalbandya,n Institute of Chemical Physics (NICP) of Armenia in collaboration with the University of Notre Dame in the USA to reveal carbide-ba,sed materials oxidation/degradation processes. Expected outcomes of this research include revealing the relationships between synth,esis, processing, and oxidation/degradation mechanisms of HfC and HfC-TaC materials under extreme conditions. The knowledge generate,d in this work will offer opportunities to develop next-generation materials for various applications and guide future manufacturing, efforts. A significant outcome of this project is the training and education of a new generation of scientists in new techniques th,at will transfer to future jobs in Armenia and create new collaboration opportunities with the University of Notre Dame.
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- Oct 06, 2022
- Source ID
- N629092212068
Entities
People
- Ani Aprahamian
Organizations
- Office of Naval Research
- United States Navy