Accession Number : ADA293637

Title :   Non Destructive Evaluation of Ceramic Bearings.

Descriptive Note : Rept. for 21 Dec 92-4 May 94,

Corporate Author : QUATRO CORP ALBUQUERQUE NM

Personal Author(s) : Rhodes, George W.

PDF Url : ADA293637

Report Date : 04 FEB 1994

Pagination or Media Count : 71

Abstract : Through a phase II SBIR MICOM funded Quatro to evaluate the Resonant Ultrasound Spectroscopy (RUS) techniques to ceramic bearings, specifically those made with Si3N4. The light weight, high temperature and hardness attributes of this material are well known, but a concern exists regarding their manufacturablity, quality and failure mechanisms. The determination of surface and near surface flaws is an operational problem which has hindered the acceptance of this material into widespread commercial applications. Before RUS no non-destructive inspection technique was able to rapidly and reliably find all the manufacturing flaws which could be present in this material and their location relative to the surface. jg p. 4

Descriptors :   *NONDESTRUCTIVE TESTING, *CERAMIC MATERIALS, *RESONANCE, *BEARINGS, TEST AND EVALUATION, MANUFACTURING, SPECTROSCOPY, HIGH TEMPERATURE, FAILURE, SURFACES, DEFECTS(MATERIALS), ULTRASONICS, INSPECTION, SOUND, LIGHTWEIGHT, HARDNESS, SILICON NITRIDES.

Subject Categories : Machinery and Tools
      Inorganic Chemistry
      Ceramics, Refractories and Glass
      Atomic and Molecular Physics and Spectroscopy

Distribution Statement : APPROVED FOR PUBLIC RELEASE