Accession Number : ADA173669
Title : Stress Corrosion of Ceramic Materials.
Descriptive Note : Annual rept. 1 Oct 84-30 Sep 85,
Corporate Author : NATIONAL BUREAU OF STANDARDS GAITHERSBURG MD CERAMICS DIV
Personal Author(s) : Freiman, S W ; White, G S ; Baker, T L ; Wiederhorn, S M ; Coyle, T D
Report Date : 01 Aug 1986
Pagination or Media Count : 70
Abstract : The critical fracture energy and susceptibility to environmentally enhanced fracture were shown to depend on the bonding in single crystals. Fracture energy results agreed with predictions based on force laws. Additions of lithium to basic solutions reduced crack growth rates in silica by over an order of magnitude. KIC and subcritical crack growth in capacitor ceramics were in a function of composition and microstructure. Correlations between strength and dielectric aging rate were obtained for aplphia Z5U capacitor material.
Descriptors : *CERAMIC MATERIALS , *STRESS CORROSION , MICROSTRUCTURE , CORROSION , LAYERS , GROWTH(GENERAL) , CRACKS , FRACTURE(MECHANICS) , CRACK PROPAGATION , SILICATES , INFRARED SPECTRA , FAILURE(ELECTRONICS) , CERAMIC CAPACITORS
Subject Categories : Ceramics, Refractories and Glass
Distribution Statement : APPROVED FOR PUBLIC RELEASE