In order to meet the preparation process of various complex functionally graded materials

a digital design and manufacture of functionally graded material based on CT scanning grayscale images is proposed. After equalizing and denoising the CT scan grayscale image

the CT scanning grayscale image was classified into grayscale according to the set threshold and grayscale

and the grayscale values classified within the threshold were averaged. The value was then mapped to the material information

so that the formed printing contour line has material information

and the material proportion of each contour was calculated according to the set threshold and gray level

and the G-code was exported together

and then input to the 3D printer of functionally graded materials for printing. According to the extrusion type functional gradient material 3D printer

two different colors of calcium carbonate-based composite water-based paste slurry were printed and verified as an example. The results show that the present printing method can simply print the gradient change in the material information of functionally graded material model.