Location

Williamsburg, VA

Start Date

1-1-1988 12:00 AM

Description

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.

Book Title

Review of Progress in Quantitative Nondestructive Evaluation

Volume

7B

Chapter

Chapter 5: Adhesive Bonds and Composites

Section

Composites—Properties

Pages

961-969

DOI

10.1007/978-1-4613-0979-6_10

Language

en

File Format

application/pdf

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Jan 1st, 12:00 AM

Nondestructive Characterization of Ceramic Composite Whiskers with Neutron Diffraction and Ultrasonic Techniques

Williamsburg, VA

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.