Thermal measuring and testing – Thermal testing of a nonthermal quantity – Expansion or contraction characteristics
Patent
1986-10-01
1988-06-21
Yasich, Daniel M.
Thermal measuring and testing
Thermal testing of a nonthermal quantity
Expansion or contraction characteristics
356358, 374 57, G01N 2516
Patent
active
047521406
ABSTRACT:
A method for the detection of delaminated areas in coated materials or layered composites, which allows free-air operation and can be used to scan portions of bulky materials on the spot. This method which makes it possible to detect very small delaminated areas in a very short time (less than 1 millisecond), with a very high sensitivity and without creation of excessive thermal stress in the inspected material, basically comprises the steps of: focusing pulsed, thermal radiations onto the structure to be inspected to produce a vertical displacement of its coating by thermal expansion if a delaminated area is present at the coating-to-substrate interface, and detecting and measuring this vertical displacement if any, by interferometry, preferably laser-beam interferometry. An apparatus for carrying out this method is also disclosed.
REFERENCES:
patent: 3462602 (1969-08-01), Apple
patent: 3978713 (1976-09-01), Penny
patent: 4243327 (1981-01-01), Frosch et al.
patent: 4484820 (1984-11-01), Rosencwaig
patent: 4513384 (1985-04-01), Rosencwaig
patent: 4521118 (1985-06-01), Rosencwaig
"Thermoelastic Inspection of Layered Materials: Dynamic Analysis" P. Cielo et al, Materials Evaluation-Aug. 1985.
"Optothermal NDE of Thermal-Barrier Coatings", P. Cielo et al presented at 1985 ASM Metals Congress-Toronto, Oct. 12-17, 1985.
Cielo Paolo
Rousset Gerard
Canadian Patents and Development Limited -Societe Canadienne des
Yasich Daniel M.
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