Apparatus and method for testing material samples for gas diffus

Details Apparatus and method for testing material samples for gas diffus Apparatus and method for testing material samples for gas diffus

1989-09-27

1992-02-18

Williams, Hezron E.

Measuring and testing

With fluid pressure

Porosity or permeability

738656, G01N 1508

Patent

active

050883160

ABSTRACT:
A method and apparatus for testing the gas diffusion characteristics of material samples includes a sealed test chamber in which one or more test cells are placed. A material sample is mounted on one end of a substantially cylindrical test cell. The chamber is then charged to a predetermined pressure and concentration of a test gas, such as radon. Periodically, gas samples are drawn through the other end of the test cell for analysis of test gas concentration, which indicates the capability of the material sample to diffuse, or prevent diffusion of, the test gas. For each test, a desired pressure differential is maintained across the material sample, and also between the chamber interior and ambient.

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patent: 4602503 (1986-07-01), Hile et al.
patent: 4656865 (1987-04-01), Callan
patent: 4791822 (1988-12-01), Penny

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