Accession Number : ADA192243

Title :   The Effects of Thin Compressive Films on Indentation Fracture Toughness Measurements,

Corporate Author : ROCKWELL INTERNATIONAL THOUSAND OAKS CA SCIENCE CENTER

Personal Author(s) : Kobrin, P H ; Harker, A B

PDF Url : ADA192243

Report Date : Jan 1988

Pagination or Media Count : 17

Abstract : Thin compressive films have been shown to decrease the lengths of radial cracks produced by a Vickers indentation in a variety of nonmetallic materials. The intrinsic stress of submicron thick films deposited by reactive ion beam sputtering was measured by a cantilever technique. The change in the apparent identation fracture toughness of the coated material was correlated with film thickness and stress, identation load, and the nature of the substrate.

Descriptors :   *COMPRESSIVE PROPERTIES, *FRACTURE(MECHANICS), *THIN FILMS, *TOUGHNESS, *PROTECTIVE COATINGS, CRACKS, ION BEAMS, MEASUREMENT, NONMETALS, SPUTTERING, THICK FILMS, ALUMINUM COMPOUNDS, SILICON DIOXIDE, SILICON NITRIDES, POLYCRYSTALLINE, GLASS, CERAMIC MATERIALS

Subject Categories : Coatings, Colorants and Finishes
      Ceramics, Refractories and Glass
      Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE