Microstructure and oxidation behavior of directionally solidified Mo–Mo5SiB2 (T2)–Mo3Si alloys

Wang, Fang; Shan, Aidang; Dong, Xianping; Wu, Jinglei

doi:10.1016/j.jallcom.2007.08.064

Cited by 20 publications

(14 citation statements)

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“…The characteristic response of three phase (Mo + A15 + T 2 ) Mo-Si-B alloys to oxidation as reflected in a transient period of major mass loss followed by a steadystate regime of minimal mass loss has been reported in other studies on several different alloy compositions and with different materials processing treatments [13,14]. Since the oxidation response has been analyzed in terms of a microstructure-based model in the current work, it is instructive to determine the application of this model to the other reported results where there is sufficient information for analysis.…”

Section: Microstructure-based Kinetic Modelmentioning

confidence: 67%

Transient oxidation of Mo–Si–B alloys: Effect of the microstructure size scale

et al. 2009

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Section: Microstructure-based Kinetic Modelmentioning

confidence: 67%

Transient oxidation of Mo–Si–B alloys: Effect of the microstructure size scale

et al. 2009

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“…The optical floating zone technique has recently been used88–91 to directionally solidify Mo‐Si‐B alloys. A halogen or xenon light beam is focused on a precast Mo‐Si‐B rod, creating a small molten zone;92 the light beam, and thus the molten zone is then slowly moved along the sample, resulting in a directionally solidified alloy88–91 or a single crystal 58. Ito et al88 pioneered the use of an optical floating zone furnace to grow directionally solidified two‐phase Mo‐3.4Si‐2.6B eutectic alloys.…”

Section: Processingmentioning

confidence: 99%

Mo‐Si‐B Alloys for Ultrahigh‐Temperature Structural Applications

Lemberg¹,

Ritchie²

2012

Advanced Materials

258

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A continuing quest in science is the development of materials capable of operating structurally at ever-increasing temperatures. Indeed, the development of gas-turbine engines for aircraft/aerospace, which has had a seminal impact on our ability to travel, has been controlled by the availability of materials capable of withstanding the higher-temperature hostile environments encountered in these engines. Nickel-base superalloys, particularly as single crystals, represent a crowning achievement here as they can operate in the combustors at ~1100 °C, with hot spots of ~1200 °C. As this represents ~90% of their melting temperature, if higher-temperature engines are ever to be a reality, alternative materials must be utilized. One such class of materials is Mo-Si-B alloys; they have higher density but could operate several hundred degrees hotter. Here we describe the processing and structure versus mechanical properties of Mo-Si-B alloys and further document ways to optimize their nano/microstructures to achieve an appropriate balance of properties to realistically compete with Ni-alloys for elevated-temperature structural applications.

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“…On the other hand, it shows better high temperature strength than MoSi 2 and Mo 5 Si 3. The excellent oxidation resistance of T2 phase is due to the formation of the boron-added silica glass scale at high temperatures [16,17].…”

Section: Introductionmentioning

confidence: 99%