Ultra High Temperature and Multifunctional Ceramic Matrix Composite – Coating Systems for Light-Weight Space and Aero Systems

Metadata Updated: July 17, 2020

Revolutionary ultra-high temperature, high mechanical loading capable, oxidation resistant, durable ceramic coatings and light-weight fiber-reinforced Ceramic Matrix Composite (CMC) systems are crucial to increase efficiency and performance of aerospace propulsion systems as well as for hypersonic and planetary entry systems. The current state-of-the-art materials include ceramic matrix composites (CMCs) and C/C composites with application temperature on the order of 2200-3000°F (1204-1650°C). A recent discovery through an ab initio molecular dynamics calculations and electronic structure modeling has identified a new hafnium-nitrogen- carbon alloy (Hf-27at%C-20at%N, or HfC0.27N0.2), which would have a melting point of more than 4400 K (7460°F, or 4127°C) [1]. This material temperature capability is at least 200 K higher than the highest melting point ever recorded experimentally rocksalt compounds, or other cubic and hexagonal structured compounds (e.g., HfC and Ta4HfC5; hafnium or zirconium borides). This creates a new opportunity for exploring next generation Ultra-High Temperature Ceramic and Coating (UHTCC) materials for extreme environment applications with the potential for significantly increasing the temperature capability and durability beyond the current state-of-the-art CMCs. The objective of the proposed effort is to evaluate the potential of UHTCC materials based on Hf-N-C system as the next generation of high temperature material, and developing its capabilities for potential high temperature multi-functional applications.

In this proposed research, we will develop fabrication technologies for processing UHTCC using HfCN based ceramics. The HfCN composition will be optimized for temperature stability, strength and oxidation resistance by evaluating the effect of various dopants (including silicon, rare earth elements, and tantalum), and in some cases (such as using for coatings or coating bond coat), with controlled oxygen content. We will also study these alloying and dopants for achieving tunable thermal and electrical conductivity for this UHTCC material. A key aspect of the proposed effort is to validate the ab-initio molecular dynamics models based on careful property measurements (such as interfacial toughness, thermodynamic properties). The down-selected compositions will then be used for processing multifunctional ceramic matrix composites reinforced with carbon nanotubes and nanofibers. We will incorporate high performance, aligned carbon nanotubes or nanofibers to develop a high thermal and electrical conductivity, high temperature ceramic matrix composites. Coatings will be developed for enhancing the durability of HfCN composites using NASA (Hf,Ta)RESiCN and other composition nano-composites, with ultra-low thermal conductivity for high temperature capability and thermal protection functions.

The goal is to develop and demonstrate the potential of a light-weight UHTCC with 1500°F temperature improvements (achieving a 4500°F material), and also with tunable electrical conductivity (10-10 to 106 S·m-1) and thermal conductivity (range up to 0.1 to 100 W/m-K) in the system.

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Public: This dataset is intended for public access and use. License: No license information was provided. If this work was prepared by an officer or employee of the United States government as part of that person's official duties it is considered a U.S. Government Work.

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Metadata Created Date August 1, 2018
Metadata Updated Date July 17, 2020

Metadata Source

Harvested from NASA Data.json

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Resource Type Dataset
Metadata Created Date August 1, 2018
Metadata Updated Date July 17, 2020
Publisher Space Technology Mission Directorate
Unique Identifier TECHPORT_93972
Maintainer Email
Public Access Level public
Bureau Code 026:00
Metadata Context https://project-open-data.cio.gov/v1.1/schema/catalog.jsonld
Metadata Catalog ID https://data.nasa.gov/data.json
Schema Version https://project-open-data.cio.gov/v1.1/schema
Catalog Describedby https://project-open-data.cio.gov/v1.1/schema/catalog.json
Harvest Object Id 4b0e2ac5-30b8-4585-b4d4-85ba78eed465
Harvest Source Id 39e4ad2a-47ca-4507-8258-852babd0fd99
Harvest Source Title NASA Data.json
Data First Published 2017-07-01
Homepage URL https://techport.nasa.gov/view/93972
Data Last Modified 2020-01-29
Program Code 026:027
Source Datajson Identifier True
Source Hash 42b4a3e5d679a2d63f473abf03205624220b42a6
Source Schema Version 1.1

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