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Dynamic Observation of MoSiBTiC Alloy Phase Transitions Using In Situ Ultrahigh-Temperature X-Ray Diffraction Measurement

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Document pages: 12 pages

Abstract: In situ ultrahigh-temperature XRD measurement of a MoSiBTiC alloy was carried out using a laser-heated diamond anvil cell and synchrotron radiation. This technique revealed the complicated dynamic behavior of phase transitions in the MoSiBTiC alloy on heating above 1950 oC. The MoSiBTiC alloy initially consisted of Mo solid solution (Moss), Mo5B2Si (T2), , Mo2B, Mo3Si, and Mo2C phases. The Mo2, Mo3Si, and Mo2C phases disappeared on heating at ~1647 °C. The Moss grains coarsened during heating and the Moss, TiC, and T2 phases were present >1950 °C. The obtained results verified the solidification pathway of the MoSiBTiC alloy.

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