Lawrence Berkeley National Laboratory masthead A-Z Index Berkeley Lab masthead U.S. Department of Energy logo Phone Book Jobs Search
Tech Transfer
Licensing Interest Form Receive Customized Tech Alerts

Boron Nitride Converted Carbon Fibers
IB-2013-032

APPLICATIONS OF TECHNOLOGY:

ADVANTAGES:

ABSTRACT:

A research team led by Alex Zettl has developed a new material, boron nitride converted carbon fibers, and an inexpensive technology for the conversion. The Berkeley Lab fibers demonstrate an increase in oxidation resistance – from 600°C for raw carbon fibers to almost 1000°C for the boron nitride converted fibers. Oxidation resistance is essential for incorporating carbon fibers into composites such as ceramic and metal matrices. Incorporating boron into the fiber preserves material strength as well.

This approach differs from boron nitride coated fibers in that the existing skin of the carbon fiber is directly converted to boron nitride, as opposed to adding an epitaxial layer of boron nitride to carbon fibers. The Berkeley Lab technology results in a coating intimately coupled to the underlying fiber and, in the case of polyacrylonitrile (PAN) fibers, preserves the original morphology and surface texture of the starting material – all without the expensive or toxic precursors.

The Berkeley Lab technology may be applied to any form of carbon fiber on the market making it easy to incorporate into existing industrial processes. The technology enables coloring of carbon fibers, for which there is currently no known process.

DEVELOPMENT STAGE: Proven principle. In tests, carbon fiber skin (about 300 nm deep) was successfully converted into boron nitride.

STATUS: Patent pending. Available for licensing or collaborative research.

 

SEE THESE OTHER BERKELEY LAB TECHNOLOGIES IN THIS FIELD:

Synthesizing Boron Nitride Nanotubes and Related Nanoparticles, IB-2848

Multilayer Graphene-Silicon Structures, IB-2955

Boron-Carbon-Nitrogen Nanoparticles and Nanotubes, IB-1079

REFERENCE NUMBER: IB-2013-032

 

See More Nano & Micro Technologies