Pulsed Current Activated Synthesis and Rapid Consolidation of a Nanostructured Mg2Al4Si5O18 and Its Mechanical Properties

손인진                                    /In-Jin Shon; 강현수; 도정만                                         /Doh; Jung-Mann; 윤진국

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자료유형: 학술저널

저자정보: 손인진 /In-Jin Shon 강현수 도정만 /Doh Jung-Mann 윤진국

저널정보: 대한금속·재료학회 Metals and Materials International Metals and Materials International Vol.21 No.2

발행연도: 2015.1

수록면: 345 - 349 (5page)

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Nanocrystalline materials have received much attention as advanced engineering materials, with improvedmechanical properties. Attention has been directed to the application of nanomaterials, as they possessexcellent mechanical properties (high strength, high hardness, excellent ductility and toughness). A singlestepsynthesis and consolidation of nanostructured Mg2Al4Si5O18 was achieved by pulsed current heating,using the stoichiometric mixture of MgO, Al2O3 and SiO2 powders. Before sintering, the powder mixturewas high-energy ball milled for 10 h. From the milled powder mixture, a highly dense nanostructuredMg2Al4Si5O18 compound could be obtained within one minute, under the simultaneous application of 80MPa pressure, and a pulsed current. The advantage of this process is that it allows an instant densificationto the near theoretical density, while sustaining the nanosized microstructure of raw powders. The sinteringbehavior, microstructure and mechanical properties of Mg2Al4Si5O18 were evaluated. The fracturetoughness of a nanostructured Mg2Al4Si5O18 compound was higher than that of sub-micron Mg2Al4Si5O18compound.

#compound #nanomaterials #mechanical properties #microstructure

참고문헌 (26)

참고문헌 신청

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O. I. Salychits / 2011 / Inorg. Mater 47:899

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M. K. Naskar / 2004 / J. Eur. Ceram. Soc 24:3499

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