An integrated high temperature environmental cell for atom probe tomography studies of gas-surface reactions: instrumentation and results

S Dumpala; S R Broderick; P A J Bagot; K Rajan

doi:10.1016/j.ultramic.2014.03.002

An integrated high temperature environmental cell for atom probe tomography studies of gas-surface reactions: instrumentation and results

Ultramicroscopy. 2014 Jun:141:16-21. doi: 10.1016/j.ultramic.2014.03.002. Epub 2014 Mar 18.

Authors

S Dumpala¹, S R Broderick¹, P A J Bagot², K Rajan³

Affiliations

¹ Iowa State University, Department of Materials Science and Engineering, Ames, IA 50011, United States.
² University of Oxford, Department of Materials, Parks Road, Oxford OX1 3PH, United Kingdom.
³ Iowa State University, Department of Materials Science and Engineering, Ames, IA 50011, United States. Electronic address: krajan@iastate.edu.

PMID: 24704605
DOI: 10.1016/j.ultramic.2014.03.002

Abstract

An integrated environmental cell has been designed and developed for the latest generation of Atom Probe Tomography LEAP™ instruments, allowing controlled exposure of samples to gases at high temperatures. Following treatment, samples can be transferred through the LEAP vacuum system for subsequent APT analysis, which provides detailed information on changes to chemical microstructures following the reactions with near-atomic resolution. A full description of the cell is presented, along with some sample results on the oxidation of aluminum and two platinum-group alloys, demonstrating the capability of combining exposure/characterization functionality in a single instrument.

Keywords: Atom Probe Tomography (APT); Catalysis; Gas–solid reactions; In-situ experimentation.

Publication types

Research Support, Non-U.S. Gov't
Research Support, U.S. Gov't, Non-P.H.S.