Surpassing the Theoretical Limit of Porosity in Conventional Solid-State Foaming: Microstructure Characterization of Length Scales in a Copper Metal Foam

Abstract

Solid-state processes for creating metal foams are often complex and/or time consuming, and in methods such as gas entrapment, there are practical limits to the porosity achievable due to pore coalescence and percolation. A simple process has been developed to create copper-based metal foam with porosity greater than 65%. The process is unique as expansion occurs within particles, not between them. The method is applied to create a bulk part. The microstructure length scales of the foamed particles are examined using 1- and 2-point microstructure statistics.

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Document Details

Document Type
Technical Report
Publication Date
Nov 01, 2014
Accession Number
ADA612840

Entities

People

  • Kris A. Darling
  • Mark A. Atwater
  • Mark Tschopp

Organizations

  • United States Army Research Laboratory

Tags

Communities of Interest

  • Advanced Electronics
  • Air Platforms
  • Weapons Technologies

DTIC Thesaurus Topics

  • Diffraction
  • Digital Image Processing
  • Digital Images
  • Engineering
  • Grain Growth
  • Grain Size
  • Image Processing
  • Image Segmentation
  • Materials
  • Mechanical Properties
  • Military Research
  • Particles
  • Powder Metallurgy
  • Powders
  • Statistics
  • Three Dimensional
  • Two Dimensional

Readers

  • Nanocomposite Materials Science
  • Polymer Science and Engineering.
  • Systems Analysis and Design