Pressureless Infiltration of Ceramics by Molten Metals.

Abstract

Pressureless infiltration of molten metals into ceramics is perhaps the most cost- effective approach to liquid-metal processing of metal-matrix composites. Two approaches are currently being investigated for their respective pressureless infiltration potential. A 'carrier oxide' approach to infiltration relies on the use of a intermediary liquid oxide which carriers the liquid metal into the capillary channels of the porous ceramic. The effectiveness of this approach was discovered by understanding the nature of wetting and spreading in copper-oxygen and copper-titanium alloy liquids in contact with alumina substrates. Aluminum oxide, a relatively cheap reinforcing material, does not develop an interface with liquid aluminum, but titanium readily wets aluminum oxide. Titanium-coated aluminum oxide surfaces are energetically conducive to the pressureless infiltration of liquid aluminum. Results from the above two approaches are discussed in detail in the following sections.

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Document Details

Document Type
Technical Report
Publication Date
Dec 01, 1995
Accession Number
ADA327502

Entities

People

  • G. R. Edwards
  • P. R. Chidambaram

Organizations

  • Colorado School of Mines

Tags

Communities of Interest

  • Advanced Electronics

DTIC Thesaurus Topics

  • Aluminum Oxides
  • Ceramic Materials
  • Chemical Reactions
  • Chemical Vapor Deposition
  • Chemistry
  • Composite Materials
  • Electron Microscopy
  • Material Degradation Processes
  • Materials
  • Materials Engineering
  • Materials Processing
  • Materials Science
  • Measurement
  • Mechanical Properties
  • Metal Matrix Composites
  • Oxidation
  • Solid Solutions

Readers

  • Powder metallurgy of Titanium alloys.
  • Reinforced Composite Materials
  • Surface Engineering/Surface Coating Technology.