Patent ID: 6568846
Filing Date: 2003-05-27
Classification: G01N

Abstract:
A method for testing thermal barrier coating material for suitability in a large caliber gun by thermally simulating the transient extreme temperature effects on such material of repeated firing of the gun, on a test specimen of such thermal barrier coating material, said test specimen comprising at least one layered material deposited on a substrate, the method for evaluating the test specimen comprising the steps of:a) providing a model of expected energy absorption of the specimen during the event which includes: i)a duration of the heating event to be simulated, ii) an energy per unit area absorbed during the simulated heating event, and iii) a heat capacity of the test specimen; b) irradiating the test specimen to provide an area of uniform heating having a temporal shape and energy absorption that closely approximates thermal loading that the specimen receives during actual use; c) measuring energy absorbed by the test specimen; and d) examining the test specimen.