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Effects of Ti, Zr, and Hf on the phase stability of Mo_ss + Mo3Si + Mo5SiB2 alloys at 1600 °C

✍ Scribed by Ying Yang; H. Bei; Shuanglin Chen; E.P. George; Jaimie Tiley; Y. Austin Chang

Publisher: Elsevier Science
Year: 2010
Tongue: English
Weight: 742 KB
Volume: 58
Category: Article
ISSN: 1359-6454
DOI: 10.1016/j.actamat.2009.09.032

No coin nor oath required. For personal study only.

✦ Synopsis

Understanding the stability of the three-phase Mo_ss + Mo 3 Si + Mo 5 SiB 2 region is important for alloy design of Mo-Si-B-based refractory metal intermetallic composites. In this work, thermodynamic modeling is coupled with guided experiments to study phase stability in this three-phase region of the Mo-Si-B-X (X = Ti, Zr, Hf) system. Both the calculated and experimental results show that additions of Zr and Hf limit significantly the stability of the three-phase region because of the formation of the ternary phases MoSiZr and MoSiHf, while Ti addition leads to a much larger region of stability for the three-phase equilibrium.

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Effects of Ti, Zr, and Hf on the phase stability of Mo_ss&#xa0;+&#xa0;Mo3Si&#xa0;+&#xa0;Mo5SiB2 alloys at 1600&#xa0;°C

✦ Synopsis

Effects of Ti, Zr, and Hf on the phase stability of Mo_ss + Mo3Si + Mo5SiB2 alloys at 1600 °C