Accession Number : ADD018342

Title :   Method and Apparatus for Ablative Bonding Using a Pulsed Electron Beam.

Descriptive Note : Patent Application, Filed 30 Jan 97,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON DC

Personal Author(s) : Hubbard, Richard F ; Fisher, Amon

PDF Url : ADD018342

Report Date : 30 Jan 1997

Pagination or Media Count : 22

Abstract : A method and apparatus for bonding a layer of coating or cladding material onto a substrate with minimal bulk heating of the substrate. A pulsed electron beam generator is used to produce high energy electrons at the beginning of the pulse and a larger number of lower energy electrons at the end of the pulse. A thin sacrificial or ablative layer of an easily-vaporized material such as tin is placed on top the coating. The high energy electrons penetrate through the ablative and coating layers and heat the coating-substrate interface. The ablative layer is then heated by the low energy electrons to a much higher temperature, causing it to vaporize. The ablation process generates a force on the coating layer which drives it into the substrate.

Descriptors :   *ABLATION, *PATENT APPLICATIONS, *DIFFUSION BONDING, *ELECTRON BEAMS, LAMINATES, ALUMINUM COATINGS, MOLYBDENUM, SUBSTRATES, ELECTRONS, PROTECTIVE COATINGS, CLADDING, DIFFUSION COATINGS, TIN COATINGS

Subject Categories : Coatings, Colorants and Finishes
      Particle Accelerators

Distribution Statement : APPROVED FOR PUBLIC RELEASE