TY - JOUR
T1 - Effect of sintering temperature in argon atmosphere on microstructure and properties of 3D printed alumina ceramic cores
AU - Li, He
AU - Liu, Yongsheng
AU - Liu, Yansong
AU - Zeng, Qingfeng
AU - Hu, Kehui
AU - Lu, Zhigang
AU - Liang, Jingjing
N1 - Publisher Copyright:
© 2020, The Author(s).
PY - 2020/4/1
Y1 - 2020/4/1
N2 - Alumina ceramics with different sintering temperatures in argon atmosphere were obtained using stereolithography-based 3D printing. The effects of sintering temperature on microstructure and physical and mechanical properties were investigated. The results show that the average particle size, shrinkage, bulk density, crystallite size, flexural strength, Vickers hardness, and nanoindentation hardness increased with the increase in sintering temperature, whereas the open porosity decreased with increasing sintering temperature. No change was observed in phase composition, chemical bond, atomic ratio, and surface roughness. For the sintered samples, the shrinkage in Z direction is much greater than that in X or Y direction. The optimum sintering temperature in argon atmosphere is 1350 °C with a shrinkage of 3.0%, 3.2%, and 5.5% in X, Y, and Z directions, respectively, flexural strength of 26.7 MPa, Vickers hardness of 198.5 HV, nanoindentation hardness of 33.1 GPa, bulk density of 2.5 g/cm3, and open porosity of 33.8%. The optimum sintering temperature was 70 °C higher than that sintering in air atmosphere when achieved the similar properties.
AB - Alumina ceramics with different sintering temperatures in argon atmosphere were obtained using stereolithography-based 3D printing. The effects of sintering temperature on microstructure and physical and mechanical properties were investigated. The results show that the average particle size, shrinkage, bulk density, crystallite size, flexural strength, Vickers hardness, and nanoindentation hardness increased with the increase in sintering temperature, whereas the open porosity decreased with increasing sintering temperature. No change was observed in phase composition, chemical bond, atomic ratio, and surface roughness. For the sintered samples, the shrinkage in Z direction is much greater than that in X or Y direction. The optimum sintering temperature in argon atmosphere is 1350 °C with a shrinkage of 3.0%, 3.2%, and 5.5% in X, Y, and Z directions, respectively, flexural strength of 26.7 MPa, Vickers hardness of 198.5 HV, nanoindentation hardness of 33.1 GPa, bulk density of 2.5 g/cm3, and open porosity of 33.8%. The optimum sintering temperature was 70 °C higher than that sintering in air atmosphere when achieved the similar properties.
KW - alumina ceramics
KW - argon atmosphere
KW - microstructure
KW - sintering temperature
KW - stereolithography
UR - http://www.scopus.com/inward/record.url?scp=85083048404&partnerID=8YFLogxK
U2 - 10.1007/s40145-020-0362-0
DO - 10.1007/s40145-020-0362-0
M3 - 文章
AN - SCOPUS:85083048404
SN - 2226-4108
VL - 9
SP - 220
EP - 231
JO - Journal of Advanced Ceramics
JF - Journal of Advanced Ceramics
IS - 2
ER -