Full metadata record
DC Field | Value | Language |
---|---|---|
dc.contributor.author | 이재성 | - |
dc.date.accessioned | 2021-04-26T04:56:59Z | - |
dc.date.available | 2021-04-26T04:56:59Z | - |
dc.date.issued | 2000-05 | - |
dc.identifier.citation | JOURNAL OF THE CERAMIC SOCIETY OF JAPAN, v. 108, issue. 1258, page. 541-547 | en_US |
dc.identifier.issn | 1882-1022 | - |
dc.identifier.issn | 0914-5400 | - |
dc.identifier.uri | https://www.jstage.jst.go.jp/article/jcersj1988/108/1258/108_1258_541/_article/-char/en | - |
dc.identifier.uri | https://repository.hanyang.ac.kr/handle/20.500.11754/161702 | - |
dc.description.abstract | Reduction behavior of tungsten oxide mixed with alumina powder and its sintering processes were investigated to fabricate Al2O3/W nanocomposites. Submicron-sized WO3 powder could be obtained by a conventional ball-milling technique. Hygrometry analysis of Al2O3/WO3 mixture revealed that WO3 powder was reduced in two steps at 873 and 973K. X-ray diffraction and transmission electron microscopy (TEM) analysis confirmed that Magneli phases, such as WO2 and WOx(x=2.89 to 2.92), were obtained by the reduction of WO3 at 873K. However, WO3 was completely reduced to metallic W when the reduction temperature was higher than 1173K. A thermodynamic analysis qualitatively agreed with the experimental result that WO2 and WOx coexisted at intermediate temperatures. Reduction followed by hot-press sintering of Al2O3/WO3 mixtures was carried out to obtain Al2O3/W nanocomposites. Agglomeration and/or incomplete reduction was found at high W content; however, dense Al2O3/W composites with >98% of their theoretical density were obtained at low W content (i.e., <10vol%). A microstructural investigation of the dense composite revealed that it consisted of both micro- and nano-sized W dispersions. Furthermore, a large number of W particles of around 40nm were found to be homogeneously dispersed in the Al2O3 matrix. These particles were much finer than the WO3 particles obtained by ball-milling. | en_US |
dc.language.iso | en_US | en_US |
dc.publisher | The Ceramic Society of Japan | en_US |
dc.subject | Reduction behavior | en_US |
dc.subject | Hygrometry analysis | en_US |
dc.subject | Sintering | en_US |
dc.subject | Nanocomposite | en_US |
dc.subject | Alumina | en_US |
dc.subject | Tungsten | en_US |
dc.subject | Thermodynamic calculation | en_US |
dc.subject | Microstructure | en_US |
dc.title | Reduction and Sintering of Alumina/Tungsten Nanaocomposite | en_US |
dc.type | Article | en_US |
dc.identifier.doi | 10.2109/jcersj.108.1258_541 | - |
dc.relation.journal | JOURNAL OF THE CERAMIC SOCIETY OF JAPAN | - |
dc.contributor.googleauthor | SEKINO, Tohru | - |
dc.contributor.googleauthor | YU, Ji-Hun | - |
dc.contributor.googleauthor | CHOA, Yong-Ho | - |
dc.contributor.googleauthor | NIIHARA, Koichi | - |
dc.contributor.googleauthor | LEE, Jai-Sung | - |
dc.relation.code | 2009205938 | - |
dc.sector.campus | E | - |
dc.sector.daehak | COLLEGE OF ENGINEERING SCIENCES[E] | - |
dc.sector.department | DEPARTMENT OF MATERIALS SCIENCE AND CHEMICAL ENGINEERING | - |
dc.identifier.pid | jslee | - |
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