Study of the post-annealing effect for the MoSi2 compound
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The low-temperature oxidation of the MoSi2 compound prepared by a self-propagating high temperature synthesis (SHS) reaction from a mixture of Mo and Si powders has been investigated by comparing the structural and chemical destructions of the MoSi2 compound. One of the comparable samples was a pellet sintered at 1700℃ and the other was synthesized powder annealed at 400℃ in air. The phase structure, microstructures, and chemical states of the samples were measured by XRD, SEM, and XPS. From the results of the analysis, the powder synthesized by SHS had a body-centred tetragonal MoSi2 crystal structure together with SiO2 and MoO3 amorphous phases from air contamination, the sample sintered at 1700℃ had a similar crystal structure to synthesized powder. On the other hand, the crystal structure of the powder annealed at 400℃ was destroyed completely into amorphous SiO2 and crystalline MoO3 phases and the loss of Mo content occurred by volatilizing MoO3.
Abstract
The low-temperature oxidation of the MoSi2 compound prepared by a self-propagating high temperature synthesis (SHS) reaction from a mixture of Mo and Si powders has been investigated by comparing the structural and chemical destructions of the MoSi2 compound. One of the comparable samples was a pellet sintered at 1700℃ and the other was synthesized powder annealed at 400℃ in air. The phase structure, microstructures, and chemical states of the samples were measured by XRD, SEM, and XPS. From the results of the analysis, the powder synthesized by SHS had a body-centred tetragonal MoSi2 crystal structure together with SiO2 and MoO3 amorphous phases from air contamination, the sample sintered at 1700℃ had a similar crystal structure to synthesized powder. On the other hand, the crystal structure of the powder annealed at 400℃ was destroyed completely into amorphous SiO2 and crystalline MoO3 phases and the loss of Mo content occurred by volatilizing MoO3.
참고문헌 (14)
- A. Arbanitis, , Acta Mater., 49, pp.1063~1078 (2001)
- J. Xu, , International J. Refractory Metals & Hard Materials, 25, pp.318~321 (2007)
- S.W. Jo, , Acta Mater., 44(11), pp.4317~4326 (1996)
- P. La, , Intermetallics, 11, pp.541~550 (2003)
- K. S. Choi, "Characterization of Quasi-Nano-Crystalline Li-Cu Ferrite Powders Prepared by Using Self-Propagating High-Temperature Synthesis", Journal of the Korean Physical Society, 50(6), pp.1719~1721 (2007), 한국물리학회
- Jong Hyun Seo, "Electrochemical Analysis of Sputtered Molybdenum Thin Films on Glass Substrates in Various Acid Solutions", Journal of the Korean Physical Society, 50(4), pp.1193~1196 (2007), 한국물리학회
- C.L. Yeh, , J. Alloy and Compounds, 438, pp.165~170 (2007)
- G. Cabouro, , Acta Mater., 55, pp.6051~6063
- B.K. Yen, , Mater. Sci. Eng., A220, pp.8~14 (1996)
- Handbook of X-ray Photoelectron Spectroscopy, (1995), Physical Electronics Inc
- G.H. Aylward, "Chemical Data", pp.47~ (1971), Joh Wiley & Sons Australasia PTY. LTD
- O. Kubaschewski, "Materials Thermo-chemistry" (1993), Pergamon
- L. Peiqing, , Surface and Coatings Tech., 135, pp.118~125 (2001)
- M. Chase, (1996), ASM International