Coating processes – Electrical product produced – Welding electrode
Patent
1990-01-23
1991-08-13
Beck, Shrive
Coating processes
Electrical product produced
Welding electrode
427214, 427215, 427299, 4274192, 427428, B05D 312
Patent
active
050395505
ABSTRACT:
This invention provides an improved method for coating reinforcing agents at are used in fiber reinforced ceramic composites and other composite materials. In the first step of this method the reinforcing agent is surface cleaned. The cleaned reinforcing agent is then dipped into a solution of a surfactant and uniformly coated therewith, whereby a positive charge is imparted to the agent. The charged agent is then dipped into a suspension of the coating material, such as alumina powder. The suspension of the coating material is prepared by dispersing the particles using ultrasonification and a dispersant, such as polyacrylate. The pH of the suspension is adjusted so that the dispersant is ionized and can adsorb on the particulate coating material. After dipping the reinforcing agent into the suspension, the reinforcing agent is dried. The steps of the method, except for the cleaning step, are repeated until a coating having a desired thickness is formed.
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Ostertag et al. (Jul. 1989) in "Composites and Advanced Ceramic Materials".
Malghan Subhas G.
Ostertag Claudia P.
Beck Shrive
Seidman Stephanie
The United States of America as represented by the Secretary of
Utech Benjamin L.
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