Archive for June, 2014

Hartshorne, Taheri, and colleagues publish in Ultramicroscopy

Posted in News on June 12th, 2014 by admin – Comments Off on Hartshorne, Taheri, and colleagues publish in Ultramicroscopy

Matthew Hartshorne, Dr. Taheri, and colleagues’ latest paper, titled “Specimen preparation for correlating transmission electron microscopy and atom probe tomography of mesoscale features,” has been published online in Ultramicroscopy.

From the abstract: “Atom-probe tomography (APT) provides atomic-scale spatial and compositional resolution that is ideally suited for the analysis of grain boundaries. The small sample volume analyzed in APT presents, however, a challenge for capturing mesoscale features, such as grain boundaries. A new site-specific method utilizing transmission electron microscopy (TEM) for the precise selection and isolation of mesoscale microstructural features in a focused-ion-beam (FIB) microscope lift-out sample, from below the original surface of the bulk sample, for targeted preparation of an APT microtip by FIB-SEM microscopy is presented. This methodology is demonstrated for the targeted extraction of a prior austenite grain boundary in a martensitic steel alloy; it can, however, be easily applied to other mesoscale features, such as heterophase interfaces, precipitates, and the tips of cracks.”

The accepted proof of the paper can be accessed here.

More information is available on the Elsevier website.

Spurgeon defends doctoral thesis

Posted in News on June 3rd, 2014 by admin – Comments Off on Spurgeon defends doctoral thesis

Steven Spurgeon has successfully defended his doctoral thesis, titled, “Correlating Interfacial Structure and Magnetism in Thin Film Oxide Heterostructures Using Transmission Electron Microscopy and Neutron Reflectometry.”