Project Title:

A Repair Coating for Cryogenic Transfer Lines

13.02-4256
NAS10-11654
A Repair Coating for Cryogenic Transfer Lines
TPL, Inc.
	3754 Hawkins NE
	Albuquerque, NM 87109
		Larry A. Harrah
(505-345-5668)

Abstract:

	This project explores a method to repair leaks in the vacuum jackets of transfer
lines for cryogenic fluids. An in-place repair process is desired, and repairs cannot
rely on conventional adhesive mechanisms. A ceramic coating will be used as a repair
material. In-place formation will be achieved through sol-gel processing. Adhesion
is obtained through mechanical forces and strong chemical bond formation. Ceramic
properties will be tailored through selective use of alkoxide precursors to match
substrate properties and operational environments. A ceramic-patch coating will be
formulated, and the ability to tailor ceramic properties to match substrate properties
will be demonstrated. Adherence of the coating to the substrate through environmental
cycling will be investigated.

Potential Commercial Application:

Potential Commercial Applications: The techniques developed in this project will
advance sol-gel technology for such applications as high-purity, high-fineness powders,
lubricants, and ceramic supports.