摘要
针对复合陶瓷材料Al2O3/SiO2/ZrO2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15 mm/s、激光功率40 W、搭接量0.4 mm,得到了气孔较少、密度3.72 g/cm3的烧结表面,能够烧结出致密并具有枝状组织的陶瓷.
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/cm^3, which can obtain the dense sintered part with dendritic organization.
出处
《东北大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2013年第3期417-420,433,共5页
Journal of Northeastern University(Natural Science)
基金
"十二五"国家科技支撑计划项目(2012BAF12B08)
辽宁省科技攻关项目(2010020076-301)
国家留学基金委建设高水平大学公派研究生项目(2010608052)
关键词
选择性激光烧结
复合陶瓷
显微结构
试验设计
工艺参数
selective laser sintering （SLS）
composite ceramic
microstructure
design of experiments
process parameters
