|About this Abstract
||2022 TMS Annual Meeting & Exhibition
||Advances in Powder and Ceramic Materials Science
||High Flowability Ultra-high Temperature Ceramic Nanocomposites Feedstock Powder Synthesis via Gel-casting
||Amy Wat, Ashley Hall, Bruce Yang, Congwang Ye, Gabriella King, Elizabeth Sobalvarro, Joshua Kuntz, Marcus Worsley, Wyatt Du Frane, James Cahill
|On-Site Speaker (Planned)
Ceramic nanograined materials have desirable characteristics compared to their macroparticle counterparts but are rarely used in industrial applications due to issues with health safety hazards and poor handleability. These issues are caused by interparticle forces that become more prevalent as the particle size decreases. The authors report a scalable sol-gel solution and unique emulsification process to create spherical microparticle agglomerates composed of nanoscale powders. The microparticle agglomerates maintains the nano-scale characteristics of the nanomaterials but improves its flowability by combining irregularly-shaped zirconium diboride nanoparticles with a particle diameter of 60 nm into larger spherical particles with a d50~20 um. The flowability improved from a Hausner Ratio of 1.44 to 1.176, highlighting its flowability. We have created flowable powders that are composed of nanomaterials via hierarchical feedstock engineering to combine the positive characteristics of materials across both length-scales and report applications in manufacturing such as thermal plasma spray and die filling.
||Ceramics, Additive Manufacturing, High-Temperature Materials