Influence of Sintering Temperature on Microstructure and Mechanical Properties of Al2O3 Ceramic via 3D Stereolithography
来源期刊：Acta Metallurgica Sinica2020年第2期
论文作者：He Li Yongsheng Liu Yansong Liu Kehui Hu Zhigang Lu Jingjing Liang
文章页码：204 - 214
摘 要：In this work,aluminum oxide（Al2O3） ceramic samples were fabricated by 3D stereolithography printing.Printing process was followed by debinding and sintering.In addition,the effect of sintering temperature on micro structure and properties was investigated.Flexure strength was observed to increase with increasing sintering temperature due to fewer pores,fewer defects and stronger grain boundary bonding of samples at higher sintering temperatures.Maximum flexure strength of 138.5 MPa was obtained when sintering temperature was 150℃.Furthermore,the shrinkage along length direction decreased with the decreasing sintering temperature until reaching minimum value of 1.02% after sintering at 1200℃.After sintering at 1280℃,flexure strength was 24.0 MPa and the shrinkage along length direction was 2.1%,which meets demands of ceramic core.
He Li1，Yongsheng Liu1，Yansong Liu1，Kehui Hu2,3，Zhigang Lu2,3，Jingjing Liang4
1. Science and Technology on Thermostructural Composite Materials Laboratory,Northwestern Polytechnical University2. Department of Mechanical Engineering,Tsinghua University3. State Key Laboratory of Tribology,Tsinghua University4. Institute of Metal Research,Chinese Academy of Sciences
摘 要：In this work,aluminum oxide（Al2O3） ceramic samples were fabricated by 3D stereolithography printing.Printing process was followed by debinding and sintering.In addition,the effect of sintering temperature on micro structure and properties was investigated.Flexure strength was observed to increase with increasing sintering temperature due to fewer pores,fewer defects and stronger grain boundary bonding of samples at higher sintering temperatures.Maximum flexure strength of 138.5 MPa was obtained when sintering temperature was 150℃.Furthermore,the shrinkage along length direction decreased with the decreasing sintering temperature until reaching minimum value of 1.02% after sintering at 1200℃.After sintering at 1280℃,flexure strength was 24.0 MPa and the shrinkage along length direction was 2.1%,which meets demands of ceramic core.
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