Accession Number:

ADA265352

Title:

Corrosion Behavior of Metal Matrix Composites

Descriptive Note:

Final rept. 1 Jul 1989-30 Sep 1992

Corporate Author:

TEXAS UNIV AT AUSTIN DEPT OF MECHANICAL ENGINEERING

Personal Author(s):

Report Date:

1993-01-01

Pagination or Media Count:

80.0

Abstract:

A research program was conducted to assess the corrosion behavior of two categories of copper metal matrix composites commercially available composites and composites in development. The commercially available composite studied was dispersion strengthened copper 2.7 vol Al2O3Cu which was found to possess comparable corrosion resistance to copper. In addition, it did not appear to be susceptible to stress corrosion cracking when U-bend specimens were tested in 3.5 wt NaCl or artificial seawater for a period of 4 months. Stress corrosion cracking was also not observed under proof ring loading in 3.5 wt NaCl for a period of 8 months at an applied stress of 95 of the yield stress. The composites in development studied were HEHR Gr sub p Cu composites containing 1.2, 5, 15, 25 and 40 vol graphite 50 vol GR sub f Cu and 70 vol W sub f Cu. These composites experienced varying degrees of galvanic corrosion during polarization. Benzotriazole, however, offers excellent potential as a corrosion inhibitor for these composites.

Subject Categories:

  • Organic Chemistry
  • Physical Chemistry
  • Laminates and Composite Materials
  • Properties of Metals and Alloys

Distribution Statement:

APPROVED FOR PUBLIC RELEASE