Ceramic-to-Metal Seals for High Power Microwave Tubes.

Abstract

The objective of the program was the development of a material process capability for metal-to-ceramic sealing used in high-power cross-field amplifier (CFA) microwave tubes. The specific objective was to develop the ion plating process to deposit multilayered metallic coatings onto the highest purity available beryllium oxide (BeO) and aluminum nitride (A1N) substrate materials. A satisfactory copper/molybdenum-to-beryllia bond was achieved without the use of an active metal adhesion aid such as titanium. An ion plating technique was developed for depositing two-layer films such as molybdenum and copper onto BeO. Subsequent evaluation of this metal-to-ceramic combination indicated a bond strength of over 140.32 Mega Pascal.

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Document Details

Document Type
Technical Report
Publication Date
May 01, 1978
Accession Number
ADA057413

Entities

People

  • Roy F. Wielonski

Organizations

  • Battelle Memorial Institute

Tags

Communities of Interest

  • Advanced Electronics
  • Biomedical
  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Adhesion
  • Air Force
  • Bonding
  • Chemistry
  • Coatings
  • Electron Tubes
  • Failure Mode And Effect Analysis
  • Films
  • Materials
  • Materials Laboratories
  • Measurement
  • Metal Coatings
  • Microwave Tubes
  • Radio Frequency Power
  • Test And Evaluation
  • Thermal Conductivity
  • Transition Temperature

Readers

  • Electronics Engineering
  • Surface Engineering/Surface Coating Technology.

Technology Areas

  • Directed Energy
  • Directed Energy - Pulsed-Laser Deposition