Contact medium for use in probe of ultrasonic flaw detector

Details Contact medium for use in probe of ultrasonic flaw detector Contact medium for use in probe of ultrasonic flaw detector

1986-07-08

1988-08-02

Chapman, John

Measuring and testing

Vibration

By mechanical waves

310336, G01H 1108

Patent

active

047607386

ABSTRACT:
A contact medium for use in a probe of an ultrasonic flaw detector is made of a macromolecular substance possessing such specific physical constants as a bulk modulus of elasticity in the range of 0.30.times.10.sup.10 to 2.00.times.10.sup.10 dynes/cm.sup.2 and an acoustic impedance in the range of 1.80.times.10.sup.5 to 2.67.times.10.sup.5 g/cm.sup.2 -sec. The medium can be used at a working temperature range of -20.degree. to 60.degree.0 C. and in a thickness in the range of 0.5 to 2.0 mm by fixedly attached to the leading end of the probe of the ultrasonic flaw detector with adhesive. The macromolecular substance is, for example, a synthetic rubber piece obtained by admixing ethylenecyclopentadiene as a base with carbon, a vulcanizer, a vulcanization accelerator, an antioxidant, ZnO, stearic acid, and process oil and molding the resulting blend.

REFERENCES:
patent: 3663842 (1972-05-01), Miller
patent: 4399526 (1983-08-01), Eynck
patent: 4446395 (1984-05-01), Hadjicostis
patent: 4523122 (1985-06-01), Tone et al.
patent: 4628223 (1986-12-01), Takeuchi et al.

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