Texture and Microstructure Evolution in Templated Piezoelectric Ceramics via Aerosol Spray Deposition (ASD) and Extrusion-Based Additive Manufacturing
Abstract
Extrusion-based Additive Manufacturing (AM) enables both compositional flexibility and the relatively straightforward incorporationof shear-driven alignment of anisometric seed particles, an important component of using Templated Grain Growth (TGG) for the fabrication of textured polycrystalline ceramics. Aerosol Spray Deposition (ASD) offers a valuable opportunity for decoupling densification from grain growth for fundamental studies of texture and microstructure evolution and is also amenable to digital and/or graded compositional control. The proposed work pursues two overarching directions, each with concrete near-term goals en route to a longer-term vision. First, we will study the coupled densification and texture evolution in ceramics fabricated using extrusion-based AM with coupled experiment and simulation. We will also leverage ASD for fundamental studies of microstructure and texture evolution of similar ceramics with minimal densification-related hurdles. The end goal is a more comprehensive understanding of texture and microstructure evolution of textured polycrystalline piezoelectric ceramics.Our proposed work integrates phase-field microstructure modelling of ceramic films and molecular dynamics simulations with experimental fabrication, characterization, and measurement tasks for rapid and validated progress in mechanistic understanding of texture and microstructure evolution during post-deposition sintering. The work focuses primarily on lead magnesium niobate-lead titanate (PMN-PT), but the mechanistic insights are expected to be applicable to other oxide piezoelectric and related systems. The simulation framework will reduce the parameter space for experiments and#coupled with characterization data#is expected to provide insights that enable engineered control of microstructure of textured ceramics fabricated via extrusion-based AM, ASD, or some other approach, with a key focus on effects of compositional complexity and the decoupling of densification from texture evolution.Thus, we propose an integrated experimental+computational study that will investigate fundamental questions about texture and microstructure development in PMN-PT-based textured ceramics.
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- Mar 15, 2024
- Source ID
- N000142412219
Entities
People
- Geoff L. Brennecka
Organizations
- Colorado School of Mines
- Office of Naval Research
- United States Navy