CCAC Lab Facilities
CCAC shares a Gatan XuM SEM-based X-ray tomography system with the Nuclear Science and Engineering Center. Several other XRT systems are also available collaboratively across campus.
CONFOCAL RAMAN LAB
Atom Probe Tomography Lab
The Dynamic Atom Probe Laboratory, for which instruments were funded via an NSF MRI Development grant in 2010. The instruments consist of a Cameca LEAP 4000XSi laser pulsed APT and a custom APT system paired with an Orsay e-Clipse || UHV STEM capable of 2 nm resolution. The electron optical system is coupled with a diffraction pattern collection system, allowing for ultrafast pattern collection and ns temporal resolution.
Synthesis and Processing
Our 3D printing capability allows for the fabrication of ceramic samples that have been designed using 3D CAD data. Shown in these images are two parts that are being printed out of barium titanate (BaTiO3), a “Mines M” and “Mines Reuleaux triangle”. Our ceramic 3D printer is an extrusion-based system and uses pneumatic pressure, as well as an Archimedes screw design, to extrude ceramic pastes that have been optimized for this process using our rheological apparatus. Once the green bodies have been fabricated, they undergo a pyrolysis step followed by final sintering and densification for obtaining a functional ceramic part.
The flow properties of colloidal ceramic suspensions need to be very well understood in order to use them for fabrication methods such as tape casting and 3D printing. Our rheological equipment allows us to study the flow and viscoelastic properties of ceramic suspensions that are developed for these applications. Shear thinning behavior is often a requirement for 3D printing, for example, and therefore there must be a very good understanding of how these suspensions are affected by the sacrificial organic additives that are used for producing proper suspension rheologies. Plots of shear stress vs shear rate, viscosity vs shear rate, and many more, can be obtained using this equipment and assists the student in the understanding of how our ceramic materials will flow during fabrication processes. Shown here is the our Anton Paar Modular Compact Rheometer (MCR) 92, with a concentric cylinder (cup and bob) setup for measuring low to medium viscosity suspensions