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Title: Ceramic coating system or water oxidation environments

A process for water oxidation of combustible materials in which during at least a part of the oxidation corrosive material is present and makes contact with at least a portion of the apparatus over a contact area on the apparatus. At least a portion of the contact surface area comprises titanium dioxide coated onto a titanium metal substrate. Such ceramic composites have been found to be highly resistant to environments encountered in the process of supercritical water oxidation. Such environments typically contain greater than 50 mole percent water, together with oxygen, carbon dioxide, and a wide range of acids, bases, and salts. Pressures are typically about 27.5 to about 1000 bar while temperatures range as high as 700.degree. C. The ceramic composites are also resistant to degradation mechanisms caused by thermal stresses.
Inventors:
 [1]
  1. (Tewksbury, MA)
Issue Date:
OSTI Identifier:
870555
Assignee:
Modar, Inc. (Natick, MA) OSTI
Patent Number(s):
US 5545337
Contract Number:
C94-170508
Country of Publication:
United States
Language:
English
Subject:
ceramic; coating; water; oxidation; environments; process; combustible; materials; corrosive; material; makes; contact; portion; apparatus; surface; comprises; titanium; dioxide; coated; metal; substrate; composites; found; highly; resistant; encountered; supercritical; typically; contain; 50; mole; percent; oxygen; carbon; wide; range; acids; bases; salts; pressures; 27; 1000; bar; temperatures; 700; degree; degradation; mechanisms; caused; thermal; stresses; contact surface; metal substrate; water oxidation; thermal stress; ceramic composites; ceramic composite; carbon dioxide; mole percent; wide range; titanium dioxide; combustible material; thermal stresses; supercritical water; typically contain; percent water; combustible materials; titanium metal; ceramic coating; oxidation environments; highly resistant; corrosive material; makes contact; /210/422/

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