Abstract： AZ ceramic (ZrO2 toughens Al2O3) is a kind of ballistic material. The nondestructive testing should be strictly conducted to ensure its protective performance. At present, it is usually detected by X-ray method. However, AZ ceramic belongs to nonstandard material, and there is lack of evidence in the determination of exposure conditions. In the study, 6063 aluminum alloy was selected as the standard material. The X-ray digital imaging of step samples of AZ ceramic and 6063 aluminum alloy were performed at same tube voltage. The relation curve and fitting formula between the thickness and image gray value were obtained by fitting. Then the equivalent coefficient between AZ ceramic and 6063 aluminum alloy at this tube voltage was calculated. The results showed that the equivalent coefficient between AZ ceramic and 6063 aluminum alloy was 3.03-3.79 when the tube voltage was in range of 75-95 kV. The study had certain guiding significance for the determination of X-ray digital radiographic testing conditions for AZ ceramics.
2022, Vol. 40 
