Interceram - International Ceramic Review

, Volume 63, Issue 4–5, pp 178–181 | Cite as

Process Compensated Resonance Testing: Whole Body Surface NDT for Ceramic Balls

  • T. KöhlerEmail author
  • L. J. Hunter
Ceramics Forum


Process Compensated Resonance Testing (PCRT) is a non-destructive evaluation method for ceramic balls using measured resonance frequencies of parts to detect surface and internal flaws. It offers fast, accurate and affordable defect detection for ceramic rolling elements for hybrid bearings. PCRT has demonstrated capabilities for bulk property/internal defect detection, process monitoring, material property characterization, and surface defect detection. In co-inspection comparison, PCRT demonstrated superior defect detection and/or throughput versus visual, FPI (Fluorescent Penetrant Inspection) and UT (Ultrasonic Testing). Vibrant’s automated ball testing system tests more than 75 balls per hour with no ball-to-ball contact. This research is funded in part by the US Navy and AFRL (Airforce Research Laboratory) with support of Vibrant’s Industrial partners at Honeywell, Rolls-Royce Corporation, GE Aviation, Winsted Precision Ball and Barden Precision Bearing.


process compensated resonance testing non-destructive testing ceramic balls SiN balls silicon nitride elements hybrid bearing aerospace industry turbine industry defect detection automated ceramic ball testing 


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  1. [1]
  2. [2]
    White paper: Process Compensated Resonance Testing — Whole Body and Surface NDT for Ceramic Balls (can be requested via Scholar

Copyright information

© Springer Fachmedien Wiesbaden 2014

Authors and Affiliations

  1. 1.Vibrant GmbH DeutschlandElzGermany
  2. 2.Hesselmann & Köhler Prozessautomation GmbHLimburgGermany
  3. 3.Vibrant CorporationAlbuquerqueUSA

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