Fabrication of Novel Composites. Part 2. Fabrication and Properties of Ba-Mica/Al2O3 Composites

Abstract

McCauley,James W. ;AMMRC-TR-73-22DA-1-T-062105-A-331See also Part 1, AD-742 207.(*composite materials, *hot pressing), alumina, mica, barium compounds, mechanical properties, ceramic materialsceramic materials, *flake compositesThe feasibility of fabricating lamellar ceramic-based composites with controllable and easily modified properties by reactive hot pressing of gamma- Al2O3 with Ba-mica (BaMg3Al2Si2O10F2) has been successfully demonstrated. Cylindrical disks 2 inches in diameter by 1/4-inch thick of Ba-mica/Al2O3 composite material with greater than 99.5% of theoretical density have been produced with the following range of properties: Knoop(100) hardness from 950 to 1970 kg/sq mm, four-point flexure strength from 38,000 to 53,500 psi, and Young's modulus from 28.6 to 60.5 x 1,000,000 psi.

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Document Details

Document Type
Technical Report
Publication Date
May 01, 1973
Accession Number
AD0762839

Entities

People

  • James W. McCauley

Organizations

  • United States Army Research Laboratory

Tags

Communities of Interest

  • Advanced Electronics
  • Air Platforms
  • Space
  • Weapons Technologies

DTIC Thesaurus Topics

  • Aluminum Oxides
  • Ceramic Matrix Composites
  • Composite Materials
  • Crystal Structure
  • Fabrication
  • Hardness
  • Hot Pressing
  • Materials
  • Materials Laboratories
  • Materials Processing
  • Materials Science
  • Mechanical Properties
  • Mechanical Working
  • Mechanics
  • Military Research
  • Modulus Of Elasticity
  • United States Military Academy

Fields of Study

  • Materials science

Readers

  • Mechanical Engineering/Mechanics of Materials.
  • Metallurgy
  • Reinforced Composite Materials