Effect of sintering aids on mechanical properties and microstructure of alumina ceramic via stereolithography

doi:10.1016/j.ceramint.2023.02.118

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	Effect of sintering aids on mechanical properties and microstructure of alumina ceramic via stereolithography
	Qian, Chuchu 1,5; Hu, Kehui 1,2,5; Shen, Zhen 3; Wang, Qing 4; Li, Peijie 1,5; Lu, Zhigang 1,2,5
刊名	CERAMICS INTERNATIONAL
	2023-06-01
卷号	49 期号:11 页码:17506-17523
关键词	Stereolithography Alumina additive manufacturing Sintering aids Mechanical properties Microstructure
ISSN号	0272-8842
DOI	10.1016/j.ceramint.2023.02.118
通讯作者	Hu, Kehui(hukehui@tsinghua.edu.cn)
英文摘要	In this study, the effects of sintering aids (CaO, TiO2, La2O3 and ZrO2) on the physical and mechanical properties and microstructure of alumina ceramics made by stereolithography were systematically investigated. The addition of 3% CaO promoted internal porous structure at high temperatures, increasing the possibility of interlayer microcracking along the inner pores. 0.5% TiO2 had the best bending strength enhancement of alumina, increasing from 110.4 MPa to 201.1 MPa at a sintering temperature of 1650 degrees C. La2O3 took effect after 1550 degrees C and basically had no effect on refining grains. 1% ZrO2 increased 15% apparent porosity and 88% interlayer shear strength and reduced sintering shrinkage by about 30%, while maintaining bending strength. Optimised alumina powder ingredients and sintering conditions that could meet the performance index requirements of the ceramic core were obtained: particle size distribution 10 mu m/2 mu m (the mass fraction ratio of coarse to fine particles was 6:4), solid content 55%, sintering aid 1% ZrO2, sintering temperature 1450 degrees C.
资助项目	National Natural Science Foundation of China[52175333] ; National Science and Technology Major Project of China[J2019 -VII -0002] ; Foshan Science and Technology Innovation Team Project[2018IT100142]
WOS关键词	ABNORMAL GRAIN-GROWTH ; GAS-TURBINE BLADES ; TIO2 ; ADDITIVES ; FABRICATION ; DENSIFICATION ; EVOLUTION ; BEHAVIOR ; DENSITY ; PHASES
WOS研究方向	Materials Science
语种	英语
出版者	ELSEVIER SCI LTD
WOS记录号	WOS:000988523700001
资助机构	National Natural Science Foundation of China ; National Science and Technology Major Project of China ; Foshan Science and Technology Innovation Team Project
内容类型	期刊论文
源URL	[http://ir.ia.ac.cn/handle/173211/53338]
专题	多模态人工智能系统全国重点实验室
通讯作者	Hu, Kehui
作者单位	1.Tsinghua Univ, State Key Lab Tribol, Beijing 100084, Peoples R China 2.Tsinghua Univ, Minist Educ, Key Lab Adv Mat Proc Technol, Beijing 100084, Peoples R China 3.Chinese Acad Sci, Inst Automat, State Key Lab Management & Control Complex Syst, Beijing 100190, Peoples R China 4.Ten Dimens Guangdong Technol Co Ltd, Foshan 528225, Peoples R China 5.Tsinghua Univ, Dept Mech Engn, Beijing 100084, Peoples R China
推荐引用方式 GB/T 7714	Qian, Chuchu,Hu, Kehui,Shen, Zhen,et al. Effect of sintering aids on mechanical properties and microstructure of alumina ceramic via stereolithography[J]. CERAMICS INTERNATIONAL,2023,49(11):17506-17523.
APA	Qian, Chuchu,Hu, Kehui,Shen, Zhen,Wang, Qing,Li, Peijie,&Lu, Zhigang.(2023).Effect of sintering aids on mechanical properties and microstructure of alumina ceramic via stereolithography.CERAMICS INTERNATIONAL,49(11),17506-17523.
MLA	Qian, Chuchu,et al."Effect of sintering aids on mechanical properties and microstructure of alumina ceramic via stereolithography".CERAMICS INTERNATIONAL 49.11(2023):17506-17523.