SLS工艺参数对Al2O3/SiO2/ZrO2复合陶瓷烧结质量的影响

针对复合陶瓷材料Al2O3/SiO2/ZrO2脆性大难加工等问题，结合选择性激光烧结(SLS)工艺成形复合陶瓷粉末，采用Nd:YAG激光器及其送粉装置进行激光烧结试验.利用扫描电镜(SEM)、能量色散X射线光谱仪(EDX)和X射线衍射分析仪(XRD)观察了成形件的微观组织并分析了微观组织成分.探讨了激光烧结的主要工艺参数对单层烧结质量的影响及扫描速度对显微结构的影响.结果表明:采用正交试验方法系统地分析了工艺过程，获得最佳工艺参数为扫描速度15mm/s、激光功率40W、搭接量04mm，得到了气孔较少、密度372g/cm3的烧结表面，能够烧结出致密并具有枝状组织的陶瓷.

Effect of SLS Process Parameters on Sintering Quality for Composite Al2O3/ZrO2/SiO2

Al2O3/SiO2/ZrO2 composite material prepared by selective laser sintering (SLS) was investigated with the Nd:YAG laser and its powder feeding device to solve the ceramics brittleness problems. Microstructure and microstructure components of the sintered part were characterized by using scanning electron microscope (SEM), energy dispersive X-ray spectroscopy (EDX) and X-ray diffraction analyzer (XRD). The effects of laser sintering process parameters on the quality of the single-layer and scanning speed on the microstructure were discussed. The results showed that the optimal parameters via the design of experiments are the scanning speed of 15 mm/s, the laser power of 40 W, hatching density of 0.4 mm and the density of 3.72 g/cm³, which can obtain the dense sintered part with dendritic organization.