Accession Number : ADA191979

Title :   Stress Corrosion of Ceramic Materials.

Descriptive Note : Annual rept. 1 Oct 86-30 Sep 87,

Corporate Author : NATIONAL BUREAU OF STANDARDS GAITHERSBURG MD CERAMICS DIV

Personal Author(s) : Freiman, S W ; White, G S ; Palamides, T R ; Balmer, M L ; Wilson, A M

PDF Url : ADA191979

Report Date : 10 Jan 1988

Pagination or Media Count : 78

Abstract : Environmentally enhanced crack growth data was obtained for GaAs in a number of chemical environments. The effectiveness of particular environments was predicted on the basis of existing crack growth models. No environment was found to produce crack growth in silicon. Dielectric aging studies were conducted on capacitor ceramics. A correlation was shown between decreases in dielectric constant and reductions in indentation strength at small indentation loads. Keywords: Crack growth, Fracture, Stress corrosion, Ceramics, Silicon, Gallium arsenide, Capacitors, Dielectric aging.

Descriptors :   *CAPACITORS, *CERAMIC MATERIALS, *STRESS CORROSION, AGING(MATERIALS), CHEMICALS, CONSTANTS, CRACK PROPAGATION, DIELECTRIC PROPERTIES, DIELECTRICS, ENVIRONMENTS, GALLIUM ARSENIDES, SILICON, IONIZING RADIATION, ENVIRONMENTAL TESTS, GLASS, GALLIUM ARSENIDES, SILICON DIOXIDE

Subject Categories : Ceramics, Refractories and Glass
      Electrical and Electronic Equipment

Distribution Statement : APPROVED FOR PUBLIC RELEASE