Nondestructive measurement of fractions of phases in mixtures and composite materials
US4897796A · kind A · utility
8Cited by
16References
20Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Nov 22, 1988 |
| Grant date | Jan 30, 1990 |
| Priority date | — |
| Expiry date | Nov 22, 2008 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2291/105
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The weight fractions of the phases of a composite material working specimen are determined nondestructively by first performing a sufficient number of nondestructive and destructive calibration measurements on the properties of calibration specimens. The information learned from the calibration specimens is used in combination with nondestructive measurements of the working specimen to determine the fractions of the phases therein, without damaging the working specimen. In one version of this approach, ultrasonic measurements are used to determine fractions of the fiber and matrix in a nonmetallic composite material.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.