| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Powder Materials Processing and Fundamental Understanding
|
| Presentation Title |
Controlling Embrittlement in Refractory Nanophase Separation Sintering Alloys |
| Author(s) |
Colton A. Gilleland, Michael J. Pavel, B. Chad Hornbuckle, Kris Darling, Gregory B. Thompson |
| On-Site Speaker (Planned) |
Colton A. Gilleland |
| Abstract Scope |
Nanophase separation sintering (NPSS) is a means to facilitate pressureless consolidation of powders. By having a solute partition to the boundaries, it can facililate necking between particles. Key to this outcome is a nanocrystalline structure coupled with correct thermodynamic characteristics between the solute and solvent species. Recent work in W-10Cr has shown promise as a NPSS alloy; however, high levels of impurities and natural oxide formations embrittle the material. In this work, we demonstrate how ternary additions mitigate the formation of these deleterious phases that cause embrittlement. Here, we report on different reactive ternary metals and their phases that form a dispersion in the ball milled and consolidated W-10Cr powders. As an example, yttria additions reduce the hardness of the W-10Cr alloy by preventing the natural chromia particles from agglomerating into larger oxide inclusions. These types of desired characteristics from ternary additions to the NPSS alloys are discussed. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
High-Temperature Materials, Powder Materials, |