摘要
利用激光近净成形系统进行了Al_2O_3/Ti O_2(13%,质量分数)陶瓷结构的直接制备,对Al_2O_3/Ti O_2陶瓷结构的成形工艺进行了研究。利用XRD、SEM等手段对所制备样件的物相、微观组织及性能进行了分析。结果表明,直接激光近净成形的Al_2O_3/Ti O_2陶瓷的物相主要为Al_2Ti O_5及Al_2O_3,沿沉积高度方向定向生长的Al_2O_3柱状晶粒分布于连续的Al_2Ti O_5基体中。所制备的Al_2O_3/Ti O_2陶瓷由于其沉积过程中化学反应的存在而具有一定量的宏观气孔,但仍然具有21GPa以上的显微硬度,抗弯强度达到170 MPa。该研究表明激光近净成形技术可以实现陶瓷材料的完全熔化-凝固成形,为直接快速制备高性能陶瓷结构提供了一种全新的选择。
The direct fabrication of Al_2O_3/TiO_2(13 wt%)ceramic structure was conducted by laser engineered net shaping system and the deposition process was studied.XRD and SEM were used to analyze the phase and microstructure.Results show that the main phases of the fabricated specimens are Al_2TiO_5 and Al_2O_3,and the Al_2O_3 columnar grains are distributed in the Al_2TiO_5 matrix.Due to the presence of the chemical reaction in the process,the Al_2O_3/TiO_2 ceramic has a certain amount of macro pores,but it still has a micro hardness of more than 21 GPa,and the bending strength is up to 170 MPa.The study shows that laser engineered net shaping technology can realize the complete melting and solidification of ceramic materials,and provides a new choice for direct and rapid fabrication of high performance ceramic structures.
出处
《稀有金属材料与工程》
SCIE
EI
CAS
CSCD
北大核心
2018年第S1期388-392,共5页
Rare Metal Materials and Engineering
基金
国家自然科学基金(51175061
51402037)
创新研究团体科学基金(51321004)
国家重点基础研究发展计划("973"计划)(2015CB057305)
