Mechanical Properties of Ferroelectric Composite Thin Films Fabricated by the Pulsed Laser Deposition Method

Abstract

Barium strontium titanium oxide (BSTO) ferroelectric films of various nominal thicknesses were deposited by the pulsed laser deposition (PLD) technique on single crystals of sapphire at substrate temperatures varying from 30 to 700 deg C. X-ray analysis showed that the thin films were amorphous up to 500 deg C, while at 700 deg C, they were polycrystalline. The microstructure of the thin films was columnar at all substrate temperatures. The film microhardness increased with increasing substrate temperature. While the cohesion failure load of the films remained fairly constant, the adhesion failure load increased with increasing substrate temperature.

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Document Details

Document Type
Technical Report
Publication Date
May 01, 1998
Accession Number
ADA349184

Entities

People

  • Costas G. Fountzoulas
  • Somnath Sengupta

Organizations

  • United States Army Research Laboratory

Tags

Communities of Interest

  • Advanced Electronics

DTIC Thesaurus Topics

  • Adhesion
  • Coatings
  • Cohesion
  • Composite Materials
  • Electron Microscopy
  • Films
  • Hardness
  • Materials
  • Mechanical Properties
  • Microhardness
  • Microstructure
  • Military Research
  • Physical Properties
  • Physical Vapor Deposition
  • Pulsed Lasers
  • Substrates
  • Thin Films

Fields of Study

  • Materials science

Readers

  • Materials Science and Engineering.
  • Mechanical Engineering/Mechanics of Materials.
  • Thin Film Deposition Science.

Technology Areas

  • Directed Energy
  • Directed Energy - Pulsed-Laser Deposition