Processing, Microstructure, and Mechanical Properties of Silicon Carbide Particulate Reinforced Aluminum Alloys.

Abstract

SiC particulate reinforced A1-2%Mg composites were produced at volume fractions 0.1, 0.2, and 0.3 by inert atmosphere ball milling followed by Hot Isostatic Pressing consolidation and extrusion. The SiC particulate sizes evaluated were 5 microns, 1 micron, and 0.2 microns. The processing sequences were carefully controlled to minimize oxygen contamination. The resulting microstructures of the as-extruded materials showed a very uniform distribution of particulates within the matrix. Ultimate strength, 0.2% yield strength, and modulus of elasticity increased with decreasing SiC particulate size: 1 micron SiC-A1 matrix showed the highest elongation. Fractures originated at inclusions rich in iron, chromium, and nickel. These contaminants seemed to come from the mill chamber and/or the hardened steel balls during ball milling. Keywords: Silicon carbide, Composites, Ball milling, Microstructure.

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Document Details

Document Type
Technical Report
Publication Date
Jan 14, 1988
Accession Number
ADA188981

Entities

People

  • Chikara Fujiwara
  • James A. Cornie
  • Joseph Blucher

Organizations

  • Massachusetts Institute of Technology

Tags

Communities of Interest

  • Advanced Electronics

DTIC Thesaurus Topics

  • Aluminum Alloys
  • Ceramic Materials
  • Chemical Analysis
  • Chemical Synthesis
  • Chemistry
  • Compound Semiconductors
  • Electron Microscopy
  • Materials
  • Materials Engineering
  • Materials Science
  • Mechanical Properties
  • Mechanical Working
  • Microscopy
  • Modulus Of Elasticity
  • Particle Size
  • Particles
  • Silicon Carbide

Fields of Study

  • Materials science

Readers

  • Metallurgy
  • Reinforced Composite Materials
  • Thin Film Deposition Science.