Reference | Presenter | Authors (Institution) | Abstract |
---|---|---|---|
12-014 | Raymond Brennan | Brennan, R.(US Army Research Laboratory); Blair, V.L.(US Army Research Laboratory); Kornecki, M.([email protected]); Raju, S.V.(ORAU); Kellogg, F.(SURVICE Engineering); Fry, A.(ORAU); |
The next generation of processing is focused on the
interaction between materials and external fields to produce outcomes that are
unattainable through conventional means, expanding materials-by-design and
processing science capabilities beyond the current state-of-the-art. Research has been conducted to utilize these
innovative technologies and material solutions for exploring the influence of
applied fields over structure-property relationships in advanced ceramic
materials. The application of magnetic,
electric, microwave, and other types of external fields during processing often
has a profound influence, altering the free energy of the system and affecting
phase formation as well as densification behavior of materials, in many cases
lowering temperatures and shortening times required to produce bulk
components. The ability to rapidly
densify materials under less extreme processing conditions can allow for
preservation of nanostructure, providing the opportunity to improve mechanical
properties that are vital to Army protection applications, including strength,
hardness, and fracture toughness. By
understanding these interactions, microstructures and phases can be tailored to
fabricate ceramics with the desired characteristics. In order to gain further control over these
field-enhanced ceramic materials, dopants, additives, and second phases can be
strategically added to amplify the response to applied fields, which is crucial
for materials that do not typically demonstrate significant responses (i.e.
diamagnetic ceramics exposed to magnetic fields). Strategies in experimental design,
computational modeling, and in-situ characterization have been employed to
develop unique field-enhanced processes, and these revelations have led to
increased interest in the influence of fields over ceramic material phases and
properties. |