激光烧结Al_2O_3-TiO_2陶瓷复合材料组织结构研究  

Study on Structure of Laser Sintering Al_2O_3-TiO_2 Ceramic Composite

作　　者：黄因慧[1] 田宗军[1] 高雪松[1] 刘志东[1] 沈理达[1] 王东生[1] 

机构地区：[1]南京航空航天大学机电学院

出　　处：《航空制造技术》2011年第19期91-92,95,共3页Aeronautical Manufacturing Technology

基　　金：国家自然科学基金(50305010);江苏省自然科学基金重点项目(BK2004005)资助

摘　　要：利用冷等静压激光烧结复合技术制备了Al2O3-TiO2陶瓷块体。采用扫描电子显微镜和X射线衍射仪对烧结块体的微观形貌和成分进行了分析。结果表明,利用上述方法制备的Al2O3-TiO2陶瓷没有明显的裂纹及微孔,块体的致密度高。陶瓷块体表面由互相交错的柱状晶组成,有利于防止沿晶断裂;而涂层的横截面呈典型的等轴晶结构,这种结构具有很高的韧性和强度,大大提高了陶瓷的性能。同时,探讨了激光与陶瓷材料相互作用及致密化过程,为以后的研究工作打下基础。The Al2O3-TiO2 ceramic composites are prepared by laser sintering and cold isostatic pressing(CIP) composite technology.Microstructures and composition of the laser sintered samples are characterized by scanning electron microscope(SEM) and X-ray diffraction(XRD).The result shows that the Al2O3-TiO2 ceramic has a higher density.Meanwhile there are no obvious cracks and porous.The interwoven columnar crystal structure appears on the surface of ceramic block,which could prevent intergranular fracture.And typical equiaxed grain structure which can greatly enhance the performance of ceramic is presented on the coating cross-sections.Because this structures have higher toughness and strength.Meanwhile,in order to lay the foundation for future research work,the interaction of laser with the ceramic material and the densification process are discussed.

关 键 词：冷等静压 激光烧结 Al2O3-TiO2 组织结构 

分 类 号：V261.97[航空宇航科学与技术—航空宇航制造工程]