摘要
提出了一种新型陶瓷增材制造方法,浆料由陶瓷粉末、有机粘结剂和去离子水构成,单层生坯的加工过程包括:铺料、冷冻和激光扫描,层层累积成型后,将冻结状态坯体置于冷冻干燥机中干燥,得到陶瓷生坯;分析了激光加工参数和浆料固含量对于激光扫描过程的影响。结果表明:采用激光扫描图形轮廓的方式,避免了激光辐照对材料内部结构的破坏;通过与冷冻干燥技术的结合,充分保留了片层状的孔隙结构;随着激光能量密度的增大,激光扫描线的宽度和激光切割的深度增大;随着浆料固含量的增加,受陶瓷颗粒对激光能量产生散射作用的影响,激光的切割深度减小。
A novel additive manufacturing(AM)method of ceramics was presented.The slurry was composed of ceramic powder,organic binder and de-ion water.The processing of a layer involves casting,freezing and laser scanning.After accumulation layer by layer,the frozen body was placed into freeze dryer to obtain the green body.The influence of laser processing parameters and solid content of slurry on laser scanning process was analyzed.The results show that the damage of the structure inside the green body is avoided by scanning only the peripheral contours.The lamellar pore structure is fully preserved by combining with freeze-drying technology.The increase of the laser energy density can increase the width of the scanning line and cutting depth.Because the laser energy is scattered by the ceramic particles,the cutting depth of the laser decreases with the increase of the solid content of the slurry.
作者
张耿
郭元章
李娜
杨少斌
陈桦
ZHANG Geng;GUO Yuan-zhang;LI Na;YANG Shao-bin;CHEN Hua(School of Mechatronic Engineering,Xian Technological University,Xian 710021,China;Shaanxi Key Laboratory of Non-Traditional Machining,Xian Technological University,Xian 710021,China)
出处
《硅酸盐通报》
CAS
CSCD
北大核心
2018年第3期1066-1071,1082,共7页
Bulletin of the Chinese Ceramic Society
基金
陕西省科技统筹创新项目(2014KTCQ01-22)
陕西省特种加工重点实验室开放基金项目(2017SXTZKFJG03)
关键词
陶瓷
分层实体制造
浆料
冷冻干燥
激光切割
ceramic
laminated object manufacturing
slurry
freeze-drying
laser cutting
作者简介
张耿(1987-),男,博士研究生.主要从事陶瓷增材制造研究.;通讯作者:陈桦,教授,博导.
