|About this Abstract
||2022 TMS Annual Meeting & Exhibition
||NanoPhase Separation Sintering in Mo and Mo-W Based Systems
||Christian Edward Oliver, Christopher Schuh
|On-Site Speaker (Planned)
||Christian Edward Oliver
Molybdenum and Molybdenum-Tungsten alloys have great potential for future nuclear power and thermal propulsion applications due to their high thermal stability, high thermal conductivity and corrosion resistance. However, Mo and Mo-W based alloys, often produced through a powder metallurgy route, can be difficult to produce, requiring high temperatures or pressure-assisted techniques such as hot isostatic pressing (HIP) to obtain dense parts. Nanophase Separation Sintering (NPSS) offers a way to design Mo-based alloys to exhibit low temperature pressureless sintering, involving the transient formation and resolutionization of second phase necks in the solid state. Experiments demonstrate that the addition of Cr as a sintering aid facilitates NPSS, obtaining near full density at low temperatures without applied pressure. Thermodynamic considerations for composition design for NPSS are also presented and experimentally evaluated.
||Powder Materials, High-Temperature Materials, Other