Fracture Strength of SiC-Diamond Composite Microcantilevers

Abstract

Silicon carbide (SiC)-diamond composites offer a combination of high hardness and fracture toughness with improved processability via reaction bonding. However, the inclusion of high diamond fractions creates new challenges in evaluating the mechanical properties by restricting sample machining methods. To circumvent some of these challenges, femtosecond laser micromachining is employed to fabricate microcantilevers. Using the microcantilevers, the fracture strength and fracture processes are examined. The mechanical testing results suggest that a strong bond is formed between the diamond particles and surrounding matrix. As a result, the fracture properties are comparable to monolithic diamond.

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Document Details

Document Type
Technical Report
Publication Date
Aug 05, 2022
Accession Number
AD1176221

Entities

People

  • Daniel Magagnosc

Organizations

  • United States Army

Tags

DTIC Thesaurus Topics

  • Abstracts
  • Carbides
  • Ceramic Materials
  • Chemical Vapor Deposition
  • Composite Materials
  • Compound Semiconductors
  • Electron Microscopes
  • Fabrication
  • Femtosecond Lasers
  • Hardness
  • Lasers
  • Machining
  • Materials
  • Maximum Likelihood Estimation
  • Mechanical Properties
  • Mechanics
  • Military Research
  • Particle Size
  • Scanning Electron Microscopes
  • Silicon Carbide
  • Toughness
  • Wear Resistance

Readers

  • Materials Science and Engineering.
  • Mechanical Engineering/Mechanics of Materials.
  • Nanoscale Plasmonic Nanotechnology

Technology Areas

  • Directed Energy