|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||Powder Metallurgy of Light, Reactive and Other Non-ferrous Metals
||Development of Gas Atomization for Generating Reactive Metal Powders for Additive Manufacturing and Powder Processing
||Iver Anderson, Emma Marie Hamilton White, Tim Prost, Jordan Tiarks, Trevor R. Riedemann, David J. Byrd, Ross D. Anderson
|On-Site Speaker (Planned)
Ideal light metal and reactive powders for additive manufacturing (AM) and advanced powder processing should be spherical, passivated, and lack internal porosity. Gas atomization can mass-produce these powders if process research on precise size distribution control and powder surface reactions is successful. Discrete-jet close-coupled gas atomization (DJ-CCA) was selected for this work within a vacuum-capable process chamber with controlled atmosphere and up-scaling capability. Pure Al powders have been produced with a narrow standard deviation (d84/d50) of 1.6-1.8 and average particle diameters (d50) that were controlled from 20Ám to 450Ám with closed-wake and open-wake high-pressure gas atomization (HPGA) nozzles. Model-driven experiments adjusted disintegration energy and gas/melt mass flows, as well as in operando particle surface reaction kinetics to approach ideal AM powder feedstocks with low hazard and loose powder sinterability. Results will be reported for Al and Al alloys. Supported by industrial partners and USDOE-EERE-AMO through Ames lab contract no. DE-AC02-07CH11358.
||Planned: Supplemental Proceedings volume