Langley Research Center, Hampton, VA

NASA researchers have developed an innovation to promote the adhesion and improve the durability of high atomic number metal coatings on oxygen- or hydroxyl-rich surfaces. This new approach is useful for building radiation shields via the Z-grading method, the process of layering metal materials with different atomic numbers to provide radiation protection for protons, electrons, and x-rays.

High atomic number materials, such as tantalum, do not bond well to oxygen-and hydroxyl-rich surfaces, such as glass fibers. These metals often form surface oxides when layered on glass fabric, resulting in flaking of the high atomic number material off the fabric during cutting, folding, and/or handling.

To improve coating durability, this technique applies a lower atomic number metal as a tie down layer first before applying the high atomic number metal layer. The tie down layer reduces oxide formation between the substrate and the high atomic number material, promoting adhesion.

Titanium has shown strong adhesion with different metals and is effective at reducing oxide formation when diffusion bonded to itself or other materials. It has been shown to be effective at improving durability when thermally sprayed onto a glass fiber fabric as a tie down layer for a subsequent tantalum layer (also applied via RF plasma spray). The titanium layer is only approximately 1 mil thick but results in strong adhesion of the tantalum layer by inter-metallic or diffusion bonding. A thermal spray process may be used, as well.

This technology enables Z-graded coatings to be applied to lower cost and lighter weight substrates, such as glass fiber fabrics, while maintaining the durability and flexibility needed for spacecraft electronics, radiation protective clothing, and other applications.

NASA is actively seeking licensees to commercialize this technology. Please contact NASA’s Licensing Concierge at This email address is being protected from spambots. You need JavaScript enabled to view it. or call at 202-358-7432 to initiate licensing discussions. For more information, visit here .

This article first appeared in the November, 2022 issue of Tech Briefs Magazine.

Read more articles from the archives here.

Fighting Gravity with the World’s First Propulsion Suit

iCLIP Speeds Up 3D Printing

Robots Walk Autonomously Via Microscopic Brains

How is AI Transforming Manufacturing?

Gallium Nitride Yields More Energy-Efficient Devices

How Well Do You Know Nanotechnology?

Machine Learning for Narrowing the Simulation-Test Gap

Precision Pulsed High Voltage: Electroporation Enabling Medical and Life Science Innovations

The Evolution of Documentation: How to Adapt for New Electric and Autonomous Vehicle Requirements

Electromagnetic Simulations for Automotive Design

Material Choices to Deliver Enhanced Reliability, Performance, and Differentiation

Simulation for Sustainable Product Development

Ring Motors - Design Flexibility for Innovative Configurations

Sapphire Fiber Could Enable Cleaner Energy and Air-Travel

Optical De-Multiplexing Method for QKD Encryption

Create the Future Design Contest: Success Story - Plastic-Eating Enzymes Chomp...

Space Radiation Research Fights Cancer on Earth

Bipolar and Unipolar Drives for Stepper Motors: A Comparison

By submitting your personal information, you agree that SAE Media Group and carefully selected industry sponsors of this content may contact you and that you have read and agree to the Privacy Policy.

You may reach us at privacy@saemediagroup.com.

You may unsubscribe at any time.

© 2009-2022 Tech Briefs Media Group