Alumina ceramics with uniform grains prepared from Al2O3 nanospheres
文献类型:期刊论文
作者 | Sun, Zhiqiang1,2; Li, Baoqiang1,2; Hu, Peng1; Ding, Fei1; Yuan, Fangli1 |
刊名 | JOURNAL OF ALLOYS AND COMPOUNDS |
出版日期 | 2016-12-15 |
卷号 | 688期号:DEC页码:933-938 |
ISSN号 | 0925-8388 |
关键词 | Spherical alumina Microstructure Hardness Sintering kinetics |
英文摘要 | 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. |
WOS标题词 | Science & Technology ; Physical Sciences ; Technology |
类目[WOS] | Chemistry, Physical ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering |
研究领域[WOS] | Chemistry ; Materials Science ; Metallurgy & Metallurgical Engineering |
关键词[WOS] | SINTERING BEHAVIOR ; SIZE DISTRIBUTION ; ALPHA-ALUMINA ; SIC WHISKERS ; POWDER ; DENSIFICATION ; STRENGTH ; MICROSTRUCTURE ; TUNGSTEN ; DENSITY |
收录类别 | SCI |
语种 | 英语 |
WOS记录号 | WOS:000384430800118 |
源URL | [http://ir.ipe.ac.cn/handle/122111/21616] |
专题 | 过程工程研究所_多相复杂系统国家重点实验室 |
作者单位 | 1.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 |
推荐引用方式 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. |
入库方式: OAI收割
来源:过程工程研究所
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