Acoustic Surface Wave Scattering: The Detection of Surface Cracks in Ceramics.

Abstract

An acoustic surface wave technique for detecting surface cracks in ceramics has been devised. The technique has been demonstrated to detect individual cracks at least as small as 60 micrometers in depth, with the detectability limit for individual cracks being imposed by the size distribution of the adjacent background cracks. The attenuation of the surface wave has also been attributed (at least in structural ceramics) to the surface cracks, and preliminary correlations between attenuation and the large extremes of the crack size distribution have been reported. (Author)

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Document Details

Document Type
Technical Report
Publication Date
Dec 20, 1977
Accession Number
ADA049181

Entities

People

  • A. G. Evans
  • B. R. Tittmann
  • B. T. Khuri-yakub
  • G. S. Kino

Tags

Communities of Interest

  • Air Platforms
  • Energy and Power Technologies
  • Weapons Technologies

DTIC Thesaurus Topics

  • Acoustic Waves
  • Air Force
  • Crystal Structure
  • Detection
  • Electronics
  • Materials
  • Materials Laboratories
  • Materials Science
  • Mechanics
  • Military Research
  • Physics Laboratories
  • Rayleigh Waves
  • Roughness
  • Structural Ceramics
  • Surface Properties
  • Surface Roughness
  • Surface Waves

Fields of Study

  • Physics

Readers

  • Electromagnetic Wave Scattering and Antenna Radiation Engineering
  • Materials Science (Mechanical Engineering).
  • Radar Systems Engineering.