Accession Number : ADA304531

Title :   Investigation of Electronic Ceramic Fibers for Non-Destructive Evaluation of Advanced Composites.

Descriptive Note : Final rept. 16 Feb 71-15 Feb 72,

Corporate Author : GENERAL ELECTRIC CO PHILADELPHIA PA SPACE DIV

Personal Author(s) : Henry, E. C.

PDF Url : ADA304531

Report Date : 15 FEB 1972

Pagination or Media Count : 47

Abstract : The objective of this program is to investigate the feasibility of developing and using crystal-bearing filaments as sensors in the non-destructive testing of fiber-reinforced plastics and related composites. The fibers or filaments contain crystalline oxidic materials commonly referred to as electronic ceramics - these compositions include several soft and hard magnetic ferrites, and ferroelectric potassium sodium niobate and lithium niobate. Work for this period included the synthesis of these compositions by high temperature solid-phase reaction. These were then dissolved in different glasses and in various concentrations, by melting. The resulting glassy solutions were shaped into test disks for devitrification studies. Significant quantities of filament were drawn and spooled, and a technique was developed for devitrifying them in 300-foot batches of 6-inch long fibers. From 3000 to 5300 feet of continuous filament was drawn of three compositions, while from 200 to 500 feet was drawn of four other compositions. jg

Descriptors :   *ELECTRONICS, *NONDESTRUCTIVE TESTING, *COMPOSITE MATERIALS, *CERAMIC FIBERS, TEST AND EVALUATION, MAGNETIC FIELDS, DETECTORS, SYNTHESIS, HIGH TEMPERATURE, CRYSTALS, GLASS, CERAMIC MATERIALS, SOLUTIONS(GENERAL), FILAMENTS, DISKS, FERROELECTRIC MATERIALS, PLASTICS, LITHIUM NIOBATES, CONTINUOUS PROCESSING, FERRITES, POTASSIUM COMPOUNDS, SOLID PHASES, FIBER REINFORCEMENT, SODIUM COMPOUNDS.

Subject Categories : Refractory Fibers
      Inorganic Chemistry
      Laminates and Composite Materials
      Plastics

Distribution Statement : APPROVED FOR PUBLIC RELEASE