| 摘要 |
PURPOSE:To calculate the thickness of a coating film comprising a heat resistant material in a non-destructive manner, by forming a corresponding calibration curve of a CT value obtained by the X-ray tomography of the thickness of a film formed when coating treatment is applied to a base material and a cut film thickness value and comparing the X-ray tomography CT value to the heat resistant material receiving coating treatment with the corresponding calibration curve. CONSTITUTION:A corresponding calibration curve is formed from a CT value obtained by the X-ray tomography of the thickness of a film formed when coating treatment is applied to a base material and a cut film thickness value and the X-ray tomography CT value to a heat resistant material receiving coating treatment is compared with the corresponding calibration curve to calculate the thickness of the coating film in a non-destructive manner. For example, from the pursuit result of the correlation between a coating thickness when silicon carbide is applied to the surface of a carbon crucible in a thickness of about 1.5-2.5mm and the CT value, the coating thickness of a measuring object can be obtained according to good correspondence relation capable of being given between both of them.
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