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Related mechanism of transparency in MgAl 2 O 4 nano-ceramics prepared by sintering under high pressure and low temperature

Zhang, Jie; Lu, Tiecheng; Chang, Xianghui; Wei, Nian; Xu, Wen

Description

We fabricate transparent MgAl2O4 nano-ceramics, which are composed of 40 nm grains, by sintering under high pressure and low temperatures. Analysis of the grain size, differential strains, yield strength and porosity obtained from transmission electron microscopy and x-ray diffraction indicates that the pores at the grain boundary triple junctions can retard grain boundary migration and thus prevent grain growth. It is found that the relatively high density for MgAl2O4 nano-ceramics produced at...[Show more]

dc.contributor.authorZhang, Jie
dc.contributor.authorLu, Tiecheng
dc.contributor.authorChang, Xianghui
dc.contributor.authorWei, Nian
dc.contributor.authorXu, Wen
dc.date.accessioned2015-12-10T22:26:58Z
dc.identifier.issn0022-3727
dc.identifier.urihttp://hdl.handle.net/1885/53990
dc.description.abstractWe fabricate transparent MgAl2O4 nano-ceramics, which are composed of 40 nm grains, by sintering under high pressure and low temperatures. Analysis of the grain size, differential strains, yield strength and porosity obtained from transmission electron microscopy and x-ray diffraction indicates that the pores at the grain boundary triple junctions can retard grain boundary migration and thus prevent grain growth. It is found that the relatively high density for MgAl2O4 nano-ceramics produced at low-temperature and high pressure is attributed mainly to the large energy in the grain exteriors. The decrease in the transparency with increasing temperature (>700 °C) is therefore a result of the light scattering at large pores. On the basis of these results, we propose a mechanism of transparency in MgAl2O4 nano-ceramics.
dc.publisherInstitute of Physics Publishing
dc.sourceJournal of Physics D: Applied Physics
dc.subjectKeywords: Ceramic materials; Grain boundaries; Grain size and shape; Light; Sintering; Transmission electron microscopy; Transparency; X ray diffraction analysis; Differential strains; Grain boundary migrations; Grain boundary triple junctions; Grain sizes; High de
dc.titleRelated mechanism of transparency in MgAl 2 O 4 nano-ceramics prepared by sintering under high pressure and low temperature
dc.typeJournal article
local.description.notesImported from ARIES
local.identifier.citationvolume42
dc.date.issued2009
local.identifier.absfor020299 - Atomic, Molecular, Nuclear, Particle and Plasma Physics not elsewhere classified
local.identifier.ariespublicationu4326120xPUB288
local.type.statusPublished Version
local.contributor.affiliationZhang, Jie, Sichuan University
local.contributor.affiliationLu, Tiecheng, Chinese Academy of Sciences
local.contributor.affiliationChang, Xianghui, Sichuan University
local.contributor.affiliationWei, Nian, Sichuan University
local.contributor.affiliationXu, Wen, College of Physical and Mathematical Sciences, ANU
local.description.embargo2037-12-31
local.bibliographicCitation.issue5
local.bibliographicCitation.startpage5
local.identifier.doi10.1088/0022-3727/42/5/052002
dc.date.updated2016-02-24T10:55:57Z
local.identifier.scopusID2-s2.0-63649132889
CollectionsANU Research Publications

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