Effect of sintering temperature in argon atmosphere on microstructure and properties of 3D printed alumina ceramic cores

作     者：He LI Yongsheng LIU Yansong LIU Qingfeng ZENG Kehui HU Zhigang LU Jingjing LIANG He LI;Yongsheng LIU;Yansong LIU;Qingfeng ZENG;Kehui HU;Zhigang LU;Jingjing LIANG

作者机构：Science and Technology on Thermostructural Composite Materials LaboratoryNorthwestern Polytechnical UniversityXi’anShaanxi 710072China NPU-SAS Joint Research Center of Advanced CeramicsNorthwestern Polytechnical UniversityXi’anShaanxi 710072China Department of Mechanical EngineeringTsinghua UniversityBeijing 100084China State Key Laboratory of TribologyTsinghua UniversityBeijing 100084China Institute of Metal ResearchChinese Academy of SciencesShenyang 110016China 

出 版 物：《Journal of Advanced Ceramics》 (先进陶瓷（英文）)

年 卷 期：2020年第9卷第2期

页      面：220-231页

核心收录：

学科分类：080503[工学-材料加工工程] 08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0802[工学-机械工程] 080201[工学-机械制造及其自动化] 

基　　金：This work was supported by National Key R&D Program of China(No.2018YFB1106600) the Chinese National Foundation for Natural Sciences under Contracts(No.51672217) 

主　　题：sintering temperature argon atmosphere alumina ceramics microstructure stereolithography 

摘      要：Alumina ceramics with different sintering temperatures in argon atmosphere were obtained using stereolithography-based 3D *** effects of sintering temperature on microstructure and physical and mechanical properties were *** 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 *** change was observed in phase composition,chemical bond,atomic ratio,and surface *** the sintered samples,the shrinkage in Z direction is much greater than that in X or Y *** optimum sintering temperature in argon atmosphere is 1350℃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/cm^3,and open porosity of 33.8%.The optimum sintering temperature was 70℃higher than that sintering in air atmosphere when achieved the similar properties.