CAS OpenIR  > 多相复杂系统国家重点实验室
Alumina ceramics with uniform grains prepared from Al2O3 nanospheres
Sun, Zhiqiang1,2; Li, Baoqiang1,2; Hu, Peng1; Ding, Fei1; Yuan, Fangli1
2016-12-15
Source PublicationJOURNAL OF ALLOYS AND COMPOUNDS
ISSN0925-8388
Volume688Issue:DECPages:933-938
Abstract

Al2O3 nanospheres are employed to synthesize alumina ceramics with uniform grains and superior hardness, and the sintering behaviors of these nanoparticles, including density, grain size and hardness evolution are studied. The results show that the aggregates are avoided during sintering owing to the employment of mono-dispersed spheres. The uniform pores packed by spherical particles can inhibit uneven grain growth effectively, which result in the uniform grains and thus the favorable hardness. The ceramic with 97.6% of theoretical density and 1.1 mu m of average grain size is obtained after sintered at 1550 degrees C, and superior hardness of 23 +/- 1.4 GPa is achieved. Furthermore, the kinetic analysis reveals that surface diffusion is responsible for the mass transport during the initial sintering stage. The higher Ea value than that of irregular powders conforms, on a side-note, the uniform pores are more effective in preventing the merging among grains and are benefit to the homogenization of grains. (C) 2016 Elsevier B.V. All rights reserved.

KeywordSpherical Alumina Microstructure Hardness Sintering Kinetics
SubtypeArticle
WOS HeadingsScience & Technology ; Physical Sciences ; Technology
DOI10.1016/j.jallcom.2016.07.122
Indexed BySCI
Language英语
WOS KeywordSINTERING BEHAVIOR ; SIZE DISTRIBUTION ; ALPHA-ALUMINA ; SIC WHISKERS ; POWDER ; DENSIFICATION ; STRENGTH ; MICROSTRUCTURE ; TUNGSTEN ; DENSITY
WOS Research AreaChemistry ; Materials Science ; Metallurgy & Metallurgical Engineering
WOS SubjectChemistry, Physical ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
Funding OrganizationNational Natural Science Foundation of China (NSFC)(11535003 ; 11575228)
WOS IDWOS:000384430800118
Citation statistics
Cited Times:15[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ipe.ac.cn/handle/122111/21616
Collection多相复杂系统国家重点实验室
Affiliation1.Chinese Acad Sci, Inst Proc Engn, State Key Lab Multiphase Complex Syst, Beijing 100190, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
Recommended Citation
GB/T 7714
Sun, Zhiqiang,Li, Baoqiang,Hu, Peng,et al. Alumina ceramics with uniform grains prepared from Al2O3 nanospheres[J]. JOURNAL OF ALLOYS AND COMPOUNDS,2016,688(DEC):933-938.
APA Sun, Zhiqiang,Li, Baoqiang,Hu, Peng,Ding, Fei,&Yuan, Fangli.(2016).Alumina ceramics with uniform grains prepared from Al2O3 nanospheres.JOURNAL OF ALLOYS AND COMPOUNDS,688(DEC),933-938.
MLA Sun, Zhiqiang,et al."Alumina ceramics with uniform grains prepared from Al2O3 nanospheres".JOURNAL OF ALLOYS AND COMPOUNDS 688.DEC(2016):933-938.
Files in This Item:
File Name/Size DocType Version Access License
Alumina ceramics wit(1638KB)期刊论文出版稿限制开放CC BY-NC-SAApplication Full Text
Related Services
Recommend this item
Bookmark
Usage statistics
Export to Endnote
Google Scholar
Similar articles in Google Scholar
[Sun, Zhiqiang]'s Articles
[Li, Baoqiang]'s Articles
[Hu, Peng]'s Articles
Baidu academic
Similar articles in Baidu academic
[Sun, Zhiqiang]'s Articles
[Li, Baoqiang]'s Articles
[Hu, Peng]'s Articles
Bing Scholar
Similar articles in Bing Scholar
[Sun, Zhiqiang]'s Articles
[Li, Baoqiang]'s Articles
[Hu, Peng]'s Articles
Terms of Use
No data!
Social Bookmark/Share
All comments (0)
No comment.
 

Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.