STRENGTHENING OF CHROMIUM-MAGNESIA COMPOSITES

Abstract

This report describes the work accomplished during the third bimonthly period of a program ultimately aimed at strengthening chromium-ceramic composites. The initial effort has been directed toward optimizing ductility prior to investigating alloy additions for strengthening. In the previous reporting period, it was found that reducing the MgO content to 3% from the 6% level used in production chrome-30 material increased the tensile elongation almost twofold. Further studies of variations in MgO content are reported herein. These investigations have shown 2% MgO to be the optimum ceramic level from the standpoint of strength and ductility. The oxidation resistance of the composites containing various amounts of MgO was evaluated at 2200F and appeared to be independent of the MgO contents studied. The tensile transition temperature of the extruded material containing 2% MgO was found to be approximately 35F. The effects of annealing at 2500F were also briefly investigated.

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Document Details

Document Type
Technical Report
Publication Date
Aug 23, 1963
Accession Number
AD0414181

Entities

People

  • G. C. Reed

Tags

Communities of Interest

  • Air Platforms
  • Ground and Sea Platforms
  • Weapons Technologies

DTIC Thesaurus Topics

  • Air Force
  • Body Weight
  • Ceramic Matrix Composites
  • Chemical Analysis
  • Composite Materials
  • Contracts
  • Corporations
  • Heat Treatment
  • Materials
  • Metals
  • Oxidation Resistance
  • Tensile Properties
  • Tensile Testing
  • Transition Temperature
  • Transitions
  • United States
  • Virginia

Fields of Study

  • Materials science

Readers

  • Powder metallurgy of Titanium alloys.
  • Systems Analysis and Design