Abstract:
Building materials are treated with a flux and then heated with a high temperature flame in order to provide a decorative, durable glazed surface. Especially useful for inexpensive building materials such as low density bricks made from slag or other waste materials.
Abstract:
THE DISCLOSURE PERTAINS TO A NEW COMPOSITION OF MATERIALS IN THE FORM A POROUS CEMENTED COMPOSITE AND A METHOD OF MAKING THE SAME. METAL POWDER SUCH AS COPPER IS MIXED WITH A CEMENT BINDER SUCH AS PORTLAND CEMENT. WHEN PREPARED AS A SLIP, POURED AND CURED, THE CEMENTED METAL POWDER HAS SUFFICIENT GREEN STRENGTH TO HOLD TIS SHAPE MAKING IT SUITABLE FOR CASTING PURPOSES. BY TREATING THE GREEN COMPOSITE WITH A HEADENING AGENT, SUCH AS AMMONIUM HYDROXIDE, IT IS HARDENED AND STRENGTHENED SO AS TO WITHSTAND GRIDING, POLISHING, MACHINING OR OTHER OPERATIONS NORMALLY ASSOCIATED ONLY WITH WORKING ON SOLID METALS. A METAL FIBER MAY BE MIXED WITH OR SUBSTITUTED FOR THE METAL POWDER WITH GOOD RESULTS.
Abstract:
THE STRUCTURAL INTEGRITY OF HIGH- OR LOW-DENSITY CARBON FOAM IS IMPROVED BY PROVIDING THE LATTER WITH A PROTECTIVE CARBONACEOUS COATING. THE PROTECTIVE COATING IS PROVIDED BY APPLYING TO EXPOSED SURFACES OF A CARBON FOAM STRUCTURE A MIXTURE OF GRAPHITE FLOUR AND A THERMOPLASTIC RESIN DISSOLVED IN A SUITABLE SOLVENT. THE COATING MIXTURE IS DRIED AT A RELATIVELY LOW TEMPERATURE TO REMOVE EXCESS SOLVENT AND THEN HEATED TO A TEMPERATURE SUFFICIENT TO CARBONIZE THE RESIN AND FORM THE COATING.