Accession Number : ADA226020


Title :   Interfacial Studies of Whisker and Coated Fiber Reinforced Ceramic Matrix Composites


Descriptive Note : Annual rept. May 1989-May 1990


Corporate Author : UNITED TECHNOLOGIES RESEARCH CENTER EAST HARTFORD CT


Personal Author(s) : Brennan, John


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a226020.pdf


Report Date : 31 May 1990


Pagination or Media Count : 95


Abstract : The objectives of this program are to characterize the interfacial region in a variety of whisker and coated fiber reinforced glass ceramic matrix composites, and to study how the structure, chemistry, and bonding characteristics of the interface influence composite properties such as strength, toughness, and environmental and thermal stability. During the past year, efforts in the whisker composite area were focused on the investigation of whisker coatings such as carbon and BN on LAS glass ceramic matrix composite properties, fabrication and characterization of calcium aluminosicicate (CAS) matrix/SiC whisker composites, high resolution TEM studies of a variety of techniques, and the evaluation of SiC platelets as an alternate reinforcement to whiskers. Efforts in the coated fiber area were focused on the evaluation of yttria and BN coated NICALON fibers from General Atomics. Results of these studies are presented. Keywords: Ceramic composite interfaces, Whisker reinforced glass ceramics, LAS matrix SiC whisker composites, Coated fiber, Glass ceramic composites.


Descriptors :   *COMPOSITE MATERIALS , BLOOD PLATELETS , ENVIRONMENTS , INTERFACES , THERMAL STABILITY , TOUGHNESS , GLASS , CARBON , HIGH RESOLUTION , REGIONS , CERAMIC MATERIALS , CHEMISTRY , COATINGS , SURFACE PROPERTIES , BONDING , REINFORCING MATERIALS , YTTRIUM OXIDES , WHISKER COMPOSITES , CALCIUM , FIBERS


Subject Categories : Laminates and Composite Materials


Distribution Statement : APPROVED FOR PUBLIC RELEASE