Engineered Nanostructures for Optimal Strength and Toughness

Abstract

The goal of this proposed work was to develop engineered nanostructures that could have extremely hard properties but yet adequate toughness approaching 20 MPa-m1/2 to prevent fracture. In the first year (2008-2009) of this work, understanding of both the necessary and limiting factors have been developed. Progress towards both high hardness and high toughness are reported along with appropriate metrics of publications and presentations. Optimal Strength and Limitations: We now have an understanding of those parameters which control hardness and strength of nanoparticles and nanopillars made of nominally brittle oxides or semiconductors such as sapphire and silicon.

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Document Details

Document Type
Technical Report
Publication Date
Aug 10, 2009
Accession Number
ADA516834

Entities

People

  • William Gerberich

Organizations

  • University of Minnesota

Tags

Communities of Interest

  • Advanced Electronics

DTIC Thesaurus Topics

  • Dislocations
  • Electron Microscopy
  • Hardness
  • Materials
  • Materials Science
  • Molecular Dynamics
  • Nanocomposites
  • Nanomaterials
  • Nanoparticles
  • Nanostructures
  • Nucleation
  • Plastic Properties
  • Residual Stress
  • Semiconductors
  • Silicon Carbide
  • Stresses
  • Toughness

Readers

  • Materials Science (Mechanical Engineering).
  • Nanocomposite Materials Science
  • Systems Analysis and Design

Technology Areas

  • Biotechnology
  • Microelectronics