Rapid manufacturing of silica glass parts with complex structures through stereolithography and pressureless spark plasma sintering |
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Affiliation: | 1. Guangdong Provincial Key Laboratory of Nanophotonic Functional Materials and Devices, School of Information and Optoelectronic Science and Engineering, South China Normal University, Guangzhou, 510006, China;2. Guangdong Provincial Key Laboratory of Industrial Ultrashort Pulse Laser Technology, Shenzhen, 518055, China;3. Han''s Laser Technology Industry Group Co., Ltd, Shenzhen, 518055, China |
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Abstract: | This paper reports a method for preparing silica glass by pressureless spark plasma sintering (PL-SPS), which can rapidly manufacture silica glass parts with complex structures by coupling with stereolithography 3D printing technology. The rapid sintering process and microstructure evolution of silica glass prepared by PL-SPS were mainly investigated. The experimental results showed that the sintering temperature and dwelling time were the main factors affecting the PL-SPS of silica glass. The microstructure evolution indicated that the densification rate of the sample was very fast from 1250 °C to 1300 °C, and the interlayer defects caused by the printed layer thickness could be healed in the final stage of densification. Like conventional pressureless sintering, silica glass with a relative density of more than 99% and a visible-light transmittance of more than 90% could also be obtained through PL-SPS, but the entire working time was shortened from 22.53 h to 0.49 h. |
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Keywords: | Silica glass Pressureless spark plasma sintering Stereolithography Complex structures |
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