Quality Evaluation of Coatings by Automatic Scratch Testing

Abstract

The soundness and comparative quality of various coatings were evaluated with a CSEM-Revetest automatic scratch tester. These coatings were: TiB2 on MP35N alloy, TiN on PH 17-4 steel, on PH 17-4 steel, and plasma-enhanced CVD-processed SiC on 4340 low alloy steel. During scratch testing, the acoustic emission signal intensity, the frictional or tangential force, and the friction coefficient were plotted versus load, as well as time at various constant loads. Scratch test results were correlated with coating microstructure which was investigated by optical and scanning electron microscopy (SEM). Significant difference in quality and soundness was detected for TiN coatings processed by two different methods. This difference was confirmed by abrasive wear resistance measurements. Keywords: Coatings, Ceramic coatings, Adhesion, Acoustic emission, Tribology, Wear resistant coatings.

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Document Details

Document Type
Technical Report
Publication Date
Nov 01, 1989
Accession Number
ADA219331

Entities

People

  • Kirit J. Bhansali
  • Theo Z. Kattamis

Tags

Communities of Interest

  • Advanced Electronics
  • Space
  • Weapons Technologies

DTIC Thesaurus Topics

  • Acoustic Emissions
  • Air Force
  • Chemical Vapor Deposition
  • Coatings
  • Corrosion Resistance
  • Electron Microscopy
  • Emission
  • Films
  • Friction
  • Materials
  • Materials Science
  • Military Research
  • Physical Vapor Deposition
  • Resistance
  • Substrates
  • Thin Films
  • Wear Resistance

Fields of Study

  • Materials science

Readers

  • Materials Science and Engineering.
  • Surface Engineering/Surface Coating Technology.
  • Tribology (the study of the boundary interaction between sliding surfaces, lubrication, wear and friction).

Technology Areas

  • Microelectronics
  • Microelectronics - Graphene