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

다국어 초록 (Multilingual Abstract)

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.

참고문헌 (Reference)

1 H. Zhu, 21 : 231-, 2010

2 S. Takeuchi, 44 : 1483-, 2001

3 O. I. Salychits, 47 : 899-, 2011

4 Y. Hu, 286 : 51-, 2001

5 M. K. Naskar, 24 : 3499-, 2004

6 K. Singh, 42 : 6426-, 2007

7 H. Ohsato, 55 : 1081-, 2008

8 M. A. Aksan, 81 : 417-, 2004

9 G. Kirat, 577 : 556-, 2013

10 M. Sherif El-Eskandarany, 305 : 225-, 2000

11 W. Kim, 568 : 73-, 2013

12 I. Jankovic-Castvan, 27 : 3659-, 2007

13 K. Niihara, 1 : 12-, 1982

14 J. E. Garay, 51 : 4487-, 2003

15 J. R. Friedman, 12 : 589-, 2004

16 J. E. Garay, 85 : 573-, 2004

17 Z. Shen, 85 : 1921-, 2002

18 J. Jung, 56 : 561-, 2007

19 S. M. Kwak, 51 : 314-, 2013

20 M. A. Camerucci, 21 : 1195-, 2001

21 이건우, "고 에너지 볼 밀링이 알루미나 소결과 기계적 성질에 미치는 영향" 대한금속·재료학회 51 (51): 95-100, 2013

22 C. Suryanarayana, "X-ray Diffraction A Practical Approach" Plenum Press 207-, 1998

23 손인진, "Simultaneous Synthesis and Consolidation of Nanocrystalline Fe2Al5 and Fe2Al5-Al2O3 by Pulsed Current Activated Sintering and Their Mechanical Properties" 대한금속·재료학회 19 (19): 99-103, 2013

24 손인진, "Properties and Pulsed Current Activated Consolidation of Nanostuctured MgSiO3-MgAl2O4 Composites" 대한금속·재료학회 19 (19): 1041-1045, 2013

25 S. Berger, "Nanocrystalline Materials:A Study of WC-based Hard Metals" 42 : 311-, 1997

26 K. Niihara, "Advanced Structural Inorganic Composite" Elsevier Scientific Publishing Co. 12-, 1990