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Meeting 2022 TMS Annual Meeting & Exhibition
Symposium Refractory Metals
Presentation Title Platinum-based superalloys: Combating high temperatures and aggressive environments
Author(s) Lesley A. Cornish
On-Site Speaker (Planned) Lesley A. Cornish
Abstract Scope Platinum is fcc with a relatively high melting point, and good corrosion resistance in many aggressive environments. In the same group as nickel, it reacts similarly with other elements. Platinum’s higher melting point (1769°C) than nickel (1455°C) is advantageous. However, there are two serious disadvantages for platinum-based alloys in applications for moving parts: high densities and high costs. Partly due the improvements in recycling, the platinum price has decreased, and the densities can be slightly reduced by alloying with lighter metals. Different platinum-based alloys were designed and tested. Most alloys had aluminium to produce the strengthening precipitates, as well as corrosion resistance. Density was reduced by substituting lower density but high melting point elements: vanadium and/or niobium. Ruthenium was added for corrosion resistance and solid solution strengthening. A thermodynamic database of Pt-Al-Cr-Ru was developed to optimize compositions, which were characterized and mechanically tested.
Proceedings Inclusion? Planned:
Keywords High-Temperature Materials, Modeling and Simulation,

OTHER PAPERS PLANNED FOR THIS SYMPOSIUM

Bending Creep Deformation of ODS MoLa with 0.6 vs 1.1 wt.%La
Design of BCC high-entropy alloys with low neutron absorption cross-section
Design of MoWTaTiZr Refractory Multi-principal Element Alloys
Development of Heat-Treatable Crss-Cr3Si-based Alloys: Microstructure, Oxidation, and Creep
Development of novel chromium-superalloys strengthened by B2 intermetallic precipitates
Effect of heating rate and substrate on the oxidation behavior of hafnium aluminum diboride thin films
Flexible powder production for additive manufacturing of refractory metals and alloys
Flow behavior and associated microstructures of niobium at 1200 to 1500°C
Grain boundary doping as effective method to improve mechanical properties in ultra-fine grained tungsten
Grain Boundary Segregation Engineering in Technically Pure Molybdenum Examined via Three-point Bending Tests
High-throughput Engineering of Oxidation Behavior in complex refectory alloys
Hydrogen Reduction of Cobalt(II,III) oxide to make sub-micron and micron size cobalt metal powder for WC-Co synthesis
NanoPhase Separation Sintering in Mo and Mo-W Based Systems
Nanostructured tungsten alloys for nuclear fusion
Oxidation behavior of Mo-Si-B-Al alloys at elevated temperature
Platinum-based superalloys: Combating high temperatures and aggressive environments
Realizing sub-micron tungsten and tungsten composite microstructures via deformable punch spark plasma sintering
Refractory High Entropy Alloys for Applications in Extreme Environments
Studies on the phase formation of cobalt contacted with zinc vapour
Sustainability-based Selection of Materials for Refractory High Entropy Alloys
Tensile Properties of Molybdenum & ODS MoLa Sheet at Elevated Temperatures
The influence of impurities on the interfacial chemistry of niobium – alumina high-temperature refractories
The oxidation behavior of the eutectic alloy Mo-20Si-52,8Ti in dry and wet atmospheres
Thermal stability of thin rolled potassium-doped tungsten sheets at temperatures between 1100 C and 1400 C
Thermodynamic assessment of the V-Ti-B system
Tungsten grain optimization and composite fabrication for use in fusion reactors

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