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Meeting 2016 TMS Annual Meeting & Exhibition
Symposium Refractory Metals 2016
Presentation Title Microstructure and Properties of a Ternary Eutectic Mo-Si-B Alloy
Author(s) Georg Hasemann, Florian Gang, Martin Palm, Iurii Bogomol, Manja Krüger
On-Site Speaker (Planned) Georg Hasemann
Abstract Scope The present work addresses Mo-Si-B alloys which are located in the so-called “Berczik triangle” and consist of a three-phase microstructure with a Mo solid solution phase (MoSS) and the two intermetallic phases Mo5SiB2 (T2) and Mo3Si. The aim of the present study is to find the ternary eutectic composition which is expected to combine properties such as high strength and an excellent creep resistance with a well-defined microstructure. Different alloy compositions in the respective primary solidification areas of the MoSS, T2 and Mo5Si3 phases were chosen to investigate the microstructural evolution. The alloys were produced by arc-melting and investigated using SEM-BSE images and EPMA measurements. The results were compared to thermodynamic calculations of the liquidus projection and isopleth phase diagrams using the software FactSage™. By carrying out these experiments it was possibly to determine the ternary eutectic point, which was found to have a nominal composition of Mo-17.5Si-8B (at.%).
Proceedings Inclusion? Planned: A print-only volume

OTHER PAPERS PLANNED FOR THIS SYMPOSIUM

Effect of Silicon on Texture of Niobium
Etched Surface of CVTD Single Crystal Tungsten Coating after Serving under High Temperature
Fracture of Severely Plastically Deformed Niobium and Tantalum
High Temperature Properties of Directionally Solidified Nb-rich Nb-Si-Cr Eutectics
Improving the Performance of Nb-Silicide Based Refractory Alloys through a Novel Cold Crucible Directional Solidification
Influences of Rare Earth on Microstructures and Mechanical Properties of Functionally Graded Cemented Carbides
Introduction of Precisely Controlled Microstructural Defects into SRF Cavity Nb Sheet and Their Impact on Local Superconducting Properties
Manufacturing of Bulk Ultrafine Grain Tungsten from Nanocrystalline Tungsten Powder and Its Potential Application for Nuclear and Fusion Reactors
Mechanical Properties of Cold-rolled Tungsten at Different Strain Rates
Micro-Mechanical Characterization of Micro-Architectured Refractory Metal Coatings
Micromechanical Testing of Multi Compositional Tungsten Thin Film Alloys
Microstructure and Properties of a Ternary Eutectic Mo-Si-B Alloy
On Plasticity of Polycrystalline Rhenium at Room Temperature
Reactive Spark Plasma Sintering of Tungsten Borides Using Elemental Tungsten and Boron Powders
Size Effect of Intermetallic Compounds on Fracture Toughness of Mo-Si-B Alloys
Stress Accommodation in Plastic Zone Ahead Crack Tip in Iridium
The Initiation and Propagation of Dynamic Abnormal Grain Growth in Refractory Metals
Thermally Activated Deformation Processes in Body-Centered Cubic Cr – How Microstructure Influences Strain-Rate Sensitivity

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