The invention relates to a method for preparing cylindrical Al2O3-GdAlO3 binary eutectic
ceramic through
selective laser melting. The method is characterized in that the cylindrical Al2O3-GdAlO3 binary eutectic
ceramic is obtained by using a CO2
laser through a
selective laser melting method, the size of the Al2O3-GdAlO3 binary eutectic
ceramic is phi 20 * 2 millimeters <3>, the obtained eutectic ceramic is fine and compact in
microstructure and presents a typical mutually-intertwined three-dimensional network eutectic solidification structure morphology, a melt material in a
laser scanning area obtains a higher degree of
supercooling and increases the
nucleation rate, so that the eutectic structure is refined, and the
mechanical property of a sample is improved. According to the method, the maximum scanning rate can reach 5000 mm / s, the
energy absorption rate is high by selecting the CO2
laser, complete melting and solidification forming of the
oxide ceramic material are better facilitated, the cylindrical sample with a curved
surface structure can be prepared, the potential of one-step rapid forming of the large-size solidification eutectic ceramic sample with a complex shape is achieved, through a subsequent optimization process, the large-size Al2O3-GdAlO3 eutectic ceramic sample with higher quality is expected to be prepared.