Ultrafine fiber composites and method of making the same

Details Ultrafine fiber composites and method of making the same Ultrafine fiber composites and method of making the same

1989-11-27

1992-03-17

Beck, Shrive

Coating processes

Electrical product produced

Welding electrode

428608, 428389, B05D 306, B32B 502

Patent

active

050967398

ABSTRACT:
A novel method is presented for synthesizing ultrafine fiber composite materials by laser induced coevaporation of a metallic target and a ceramic target in the presence of a heated tungsten filament, within a reducing environment. The species produced by rapid condensation from the resultant laser plume, along with the products derived from the chemical transport reactions involving the heated filament, form layers of composite material comprising a metal matrix and a random weave fiber network. In a preferred embodiment of the present invention, composite layers are formed on a nickel alloy substrate surface at a rate of about 1 micron per second. The matrix of the composite films is either aluminum or tungsten and the dispersed phase is amorphous silica fibers. The diameter of the fibers are between 25 and 120 nm depending on the laser beam materials interaction time.

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Bartholomew et al., "Low Temp. Syn. of High Tc Superconductor Thin Films by Laser Assisted Reactive Deposition", High Temp Superconductors II, pp. 81-84, Ed Capone II et al., 4/88.

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