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Nondestructive measurement of fractions of phases in mixtures and composite materials

  • US 5,095,442 A
  • Filed: 01/29/1990
  • Issued: 03/10/1992
  • Est. Priority Date: 11/12/1986
  • Status: Expired due to Fees
First Claim
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1. A process for determining fractions of phases present in a working specimen of a composite material, comprising the steps of:

  • providing at least one calibration specimen of a composite material;

    nondestructively measuring properties of the calibration specimen that vary with the fraction of the phases present in the calibration specimen, the step of nondestructively measuring including the substeps ofmeasuring the time of flight required for an ultrasonic wave to pass through the calibration specimen, andmeasuring the thickness of the calibration specimen;

    destructively determining the fraction of the phases present in the calibration specimen;

    nondestructively measuring the properties of the working specimen that vary with the fraction of the phases present in the working specimen, the step of nondestructively measuring including the substeps ofmeasuring the time of flight required for an ultrasonic wave to pass through the working specimen, andmeasuring the thickness of the working specimen;

    determining the fractions of the phases present in the working specimen utilizing information obtained from the measurements of the working specimen, the nondestructive measurement of the calibration specimen, and the determination of the fractions of the phases present in the calibration specimen.

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