Nondestructive Characterization of Ceramic Composite Whiskers with Neutron Diffraction and Ultrasonic Techniques
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Begun in 1973, the Review of Progress in Quantitative Nondestructive Evaluation (QNDE) is the premier international NDE meeting designed to provide an interface between research and early engineering through the presentation of current ideas and results focused on facilitating a rapid transfer to engineering development.
This site provides free, public access to papers presented at the annual QNDE conference between 1983 and 1999, and abstracts for papers presented at the conference since 2001.
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Abstract
A necessary step in the development of structural composites is the understanding and characterization of the bond between fiber and matrix, Questions regarding the mechanical properties of the optimum interfacial bond and how properties of the bond can be assessed nondestructively must be answered. In this paper we present some results of a program at Argonne National Laboratory (ANL) in which the characterization and control of interfacial bonds in composites are being investigated. The General Purpose Powder Diffractometer (GPPD) at the Intense Pulsed Neutron Source (IPNS) at ANL has been employed to measure residual strains in a ceramic-ceramic composite by neutron diffraction techniques. From the residual strain measurements it is possible to calculate stresses at the fiber-matrix interface. The results of the residual strain experiment and the initial results from experiments in which ultrasonic techniques were used to assess whisker-matrix bonding are discussed in this paper.