• CN: 11-2187/TH
  • ISSN: 0577-6686

Journal of Mechanical Engineering ›› 2019, Vol. 55 ›› Issue (9): 224-232.doi: 10.3901/JME.2019.09.224

Previous Articles    

Process Optimization of Oxygen-inhibition-based Ceramic Mask-projection Stereolithography

LIU Xiaodong1, LIAN Qin1,2, LI Dichen1,2, CAO Yi1,2, WU Shanghua3, WU Xiangquan1, MENG Jiali1, HE Xiaoning4   

  1. 1. Stake key Laboratory for Manufacturing Systems Engineering, Xi'an Jiaotong University, Xi'an 710054;
    2. Shaanxi Rapid Manufacturing national Engineering Technology Research Center, Xi'an Jiaotong University, Xi'an 710054;
    3. School of Electr-mechanical Engineering, Guangdong University of Technology, Guangzhou 510006;
    4. Wide Bandgap Semiconductor Technologe Disciplines State Key Laborary, Xidian University, Xi'an 710049
  • Received:2018-10-12 Revised:2018-12-09 Online:2019-05-05 Published:2019-05-05

Abstract: The application of oxygen-inhibition leads to significant enhance of the forming speed and precision of mask-projection stereolithography technology. A mask-projection stereolithography system with a controlled oxygen set and the self-developed Al2O3 slurry have been applied to explore the influence of oxygen concentration and PDMS film thickness on the separation force between the cured layer and the surface of PDMS film. The optimal thickness of 0.3mm of PDMS film is selected to find how the oxygen work on the size accuracy, shrinkage and mechanical strength of ceramic parts. The oxygen-inhibition application significantly lessened the separation forces in the ceramic curing period, but had no effect on the bonding strength (~175 MPa) of ceramic parts. Meanwhile, the appropriate oxygen concentration had capability of getting good accuracy and surface quality of the parts. Orthogonal experiments are carried out to determine the optimal process parameters of the porous structures (including oxygen concentration, light exposure intensity and slice thickness), the formed morphological structures under the optimal oxygen concentration (about 40%) were better than that of under air condition (the oxygen concentration, about 20%),the maximum size deviation is reduced by 45%.

Key words: ceramics, mask-projection stereolithography, oxygen inhibition, processing precision

CLC Number: