Verfahren der gerichteten Erstarrung

Kurz, W.; Sahm, Peter R.

doi:10.1007/978-3-642-65993-5_7

Cited by 1 publication

(1 citation statement)

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“…Due to the relatively shallow and flat liquidus surface of the silicide phases Mo 3 Si and Mo 5 SiB 2 compared to the steep liquidus surface of the Mo SS phase, slight changes in the chemical compositions or drastically undercooled liquids during arc-melting are able to shift the phase stability and thus the eutectic growth regime out of the invariant point. As a result, a few primary crystals may occur in the microstructure and according to Kurz and Sahm [30] even secondary crystallization is possible. While the Mo-Si-B system is relatively well investigated, the situation is quite uncertain in the V-Si-B neighbor system.…”

Section: Resultsmentioning

confidence: 99%

Microstructures of Ternary Eutectic Refractory Me-Si-B (Me = Mo, V) Alloy Systems

Hasemann

Krüger

Palm

et al. 2018

MSF

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The present work addresses the microstructure evolution of refractory Me-Si-B (Me = Mo, V) alloys consisting of a refractory metal solid solution phase (MeSS) and two intermetallic phases Me5SiB2and Me3Si. The aim of the present study is to find the ternary eutectic composition in such systems which are expected to combine a well-defined eutectic microstructure with properties such as high strength, an excellent creep resistance at high temperatures and acceptable oxidation behavior. Two refractory metal systems based on molybdenum and vanadium are investigated. Various alloy compositions located in different primary solidification areas were produced by arc-melting and analyzed via SEM. The obtained results are discussed in the light of published liquidus projections. By carrying out these experiments, a MeSS-Me5SiB2-Me3Si ternary eutectic could be determined in both Me-Si-B systems.

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Section: Resultsmentioning

confidence: 99%