Nanoindentation Technique at Investigating of Aluminum Oxide - CrC Nanoparticles Composite Coating

Abstract

In this paper fatigue and fracture of Al-Al2O3-CrC nanostructured composite coatings was investigated by nanoindentation technique and in-situ experiments performed by a scanning electron microscope to permit examination of freshly exposed surfaces. Crystallographic and morphological textures were characterized and fracture resistance was measured. CrC layer improves fracture resistance of alumina layer. CrC layer produced by pyrolitic deposition (CVD) may effectively heal pores and defects of alumina layer. It resulted in high load rating of the composite coating. Experiments reveal that in all cases, the detection of an acoustic signal corresponded to the appearance of a circular cracks seen on surface; in a very few cases, examination of surface after detection of a signal revealed presence of two ring cracks. Degree of toughening associated with crack healing is determined by a number of healed defects and an effectiveness of an individual healing.

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Document Details

Document Type
Technical Report
Publication Date
Jan 01, 2003
Accession Number
ADP014268

Entities

People

  • Maksim V. Kireitseu

Organizations

  • National Academy of Sciences

Tags

DTIC Thesaurus Topics

  • Aluminum Oxides
  • Chemical Vapor Deposition
  • Coatings
  • Composite Materials
  • Hardness
  • Materials
  • Materials Processing
  • Mechanical Properties
  • Mechanics
  • Microhardness
  • Modulus Of Elasticity
  • Nanocomposites
  • Nanomaterials
  • Nanoparticles
  • Nanostructures
  • Plastic Properties
  • Resistance

Fields of Study

  • Materials science

Readers

  • Materials Science (Mechanical Engineering).
  • Reinforced Composite Materials
  • Thin Film Deposition Science.

Technology Areas

  • Biotechnology
  • Microelectronics
  • Microelectronics - Graphene