TiC-reinforced Mo–Si–B alloys (designated as MoSiBTiC alloys) exhibit great potential for application in the aerospace industry, due to their high melting point, moderate density and attractive high-temperature strength and creep resistance. Nevertheless, further material design and industrialization requires more systematic understanding of the phase diagram and solidification paths of Mo–Mo5SiB2–TiC pseudo-ternary system. In this study, an advanced ultra-high temperature thermal analysis method employing blackbody radiation and an electromagnetic levitation technique for in situ observation of the solidification process, were utilized to experimentally investigate the solidification process and reaction temperature of alloys in the vicinity of the Mo–Mo5SiB2–TiC ternary eutectic point. On the basis of the experimental results, three vertical sections of phase diagram at 9 mol% Mo5SiB2, 10 mol% TiC, and 70 mol% Moss isopleths in the Mo–Mo5SiB2–TiC pseudo-ternary system were established. The liquidus surface projection on the Mo–Mo5SiB2–TiC system has also been reconstructed, with the addition of a new Mo2B primary phase region and a larger Mo5SiB2 primary phase region than previously reported.

中文翻译：

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Mo–Mo5SiB2–TiC 伪三元系统的液相线表面投影和相图的垂直截面


TiC 增强 Mo-Si-B 合金（称为 MoSiBTiC 合金）由于其高熔点、中等密度和有吸引力的高温强度和抗蠕变性，在航空航天工业中表现出巨大的应用潜力。然而，进一步的材料设计和工业化需要更系统地了解 Mo–Mo5SiB2–TiC 伪三元系统的相图和凝固路径。本研究采用先进的超高温热分析方法，采用黑体辐射和电磁悬浮技术原位观察凝固过程，实验研究了 Mo-Mo5SiB2-TiC 三元共晶点附近合金的凝固过程和反应温度。根据实验结果，建立了 Mo–Mo5SiB2–TiC 准三元系中 9 mol% Mo5SiB2、10 mol% TiC 和 70 mol% Moss 等体积的三个垂直相图截面。Mo-Mo5SiB2-TiC 系统上的液相线表面投影也得到了重建，增加了一个新的 Mo2B 初级相区域和一个比以前报道的更大的 Mo5SiB2 初级相区域。