原位超高温x射线衍射测量MoSiBTiC合金相变的动态观察

EngRN: Engineering Design Process (Topic) Pub Date : 2020-09-01 DOI:10.2139/ssrn.3628003

H. Fukuyama, M. Ohtsuka, R. Sawada, Haruki Nakashima, Y. Ohishi, N. Hirao, M. Takata, K. Yoshimi

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引用次数: 2

摘要

摘要:采用激光加热金刚石砧池和同步辐射对MoSiBTiC合金进行了原位超高温XRD测量。该技术揭示了MoSiBTiC合金在1950℃以上加热时相变的复杂动态行为。MoSiBTiC合金最初由Mo固溶体(Moss)、Mo5B2Si (T2)、TiC、Mo2B、Mo3Si和Mo2C相组成。在~1647℃加热时，Mo2B、Mo3Si和Mo2C相消失。在加热过程中，Moss晶粒变粗，在1950℃前后出现了Moss相、TiC相和T2相。所得结果验证了MoSiBTiC合金的凝固路径。

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

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 °C. The MoSiBTiC alloy initially consisted of Mo solid solution (Moss), Mo5B2Si (T2), TiC, Mo2B, Mo3Si, and Mo2C phases. The Mo2B, 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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EngRN: Engineering Design Process (Topic)

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