Accession Number : ADA307842

Title :   Reduction of Hazardous Waste Through Advanced Coating Technology.

Descriptive Note : Final rept. 1 Apr 93-31 Jan 96,

Corporate Author : SCIENCE APPLICATIONS INTERNATIONAL CORP MCLEAN VA

Personal Author(s) : Kirkpatrick, D. A.

PDF Url : ADA307842

Report Date : 01 MAY 1996

Pagination or Media Count : 194

Abstract : This project looked at applying an Ion-Beam Assisted Deposition (IBAD) alumina coating process to problems of DOD interest. The motivation for this effort was the potential of the IBAD alumina process as a 'green manufacturing' and performance improvement alternative to existing coating processes. This project demonstrated the compatibility of the process with a wide array of substrates, including metals, composites, and plastics. Through manipulation of the process parameters and surface modification of the substrate materials, alumina or aluminum-oxynitride coatings have been successfully applied to virtually any substrate that has been attempted. The resultant coatings are very hard, highly transparent, chemically resistant, and relatively flexible. A principal conclusion is that achieving a wider range of multi-requirement performance with a single coating layer of uniform composition is not likely. The compatibility of the IBAD process with a wide range of materials may offer a potential solution by dividing the factional responsibilities of a coating system structure across multiple layers. Each layer is the coating system addresses one or some of the above requirements while not compromising the performance of the other layers in the system. The IBAD alumina coating has also been shown to be an effective diffusion barrier material and is being considered for use in long-life solar reflector materials.

Descriptors :   *ION BEAMS, *COATINGS, *DEPOSITION, *ALUMINUM, *HAZARDOUS WASTES, METALS, LAYERS, MODIFICATION, MATERIALS, ARRAYS, SUBSTRATES, REDUCTION, SURFACES, SOLUTIONS(GENERAL), ALUMINUM OXIDES, BARRIERS, DIFFUSION, MOTIVATION, WASTE DISPOSAL, RANGE(EXTREMES), WASTE TREATMENT, OXYNITRIDES.

Subject Categories : Solid Wastes Pollution and Control
      Biochemistry
      Coatings, Colorants and Finishes

Distribution Statement : APPROVED FOR PUBLIC RELEASE