Materials Science

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Materials science researcher is Sandia’s first outbound Faculty Loan joint appointee

News Article, June 22, 2023 • Jonathan Pegues, a researcher in Sandia’s Coatings & Additive Manufacturing department, was approved to be the first formally approved Sandia outbound Faculty Loan joint appointee. Pegues’ joint appointment is an agreement between Sandia and Auburn University’s (AU) National Center for Additive Manufacturing Excellence (NCAME). The NCAME is a collaborative effort...

Jonathan Pegues stands in front of a building of Auburn University

Predicting catastrophic failure and collapse in infrastructure

News Article, March 20, 2023 • The team, led by Sandia principal investigator Jessica Rimsza, developed new modeling capabilities for evaluating multiphase phenomena in cement-based materials in energy and infrastructure applications, a chemo-mechanical model for cement fracture, identified sources of uncertainty in cement degradation and concrete fracture, and created six new capabilities for modeling brittle fracture...

Revealing the kinetics of atmospheric corrosion damage through in-situ x-ray computed tomography and machine vision

News Article, June 8, 2023 • In-situ XCT enables both the growth rate and morphology (yellow) of pits to be directly characterized in relationship to the evolving electrolyte (blue) and prior stages of pit morphology (black). Atmospheric corrosion is a critical materials degradation problem, yet the ability to predict its kinetics remains elusive. Conventional approaches provide...

Smart materials for highly complex tags with environmental response

News Article, June 22, 2023 • Cover of the Journal of the German Chemical Society Angewandte Chemie International Edition As counterfeiting methods become more sophisticated, countermeasures must be developed at the same pace. In this Sandia LDRD project, unique exemplars of next generation anticounterfeiting optical tags were developed that leverage the luminescent properties of materials for...

Stress intensity thresholds for development of reliable brittle materials

News Article, June 22, 2023 • Cover of the Journal of the American Ceramic Society Brittle material failure can appear random and unpredictable at subcritical stresses. A fundamental understanding of how structural and environmental factors impact fracture propagation is necessary to predict fracture in these systems. Through this project, a physics-based model of glass fracture was...

The Journal of the American Ceramic Society featuring the Sandia research projects.

Understanding the effects of radiation on reconfigurable phase change materials

News Article, June 22, 2023 • David Adams was elected Fellow and President of American Vacuum Society: Science and Technology of Materials, Interfaces and Processing in 2023. Chalcogenide thin films that undergo reversible phase changes show promise for next-generation nanophotonics, metasurfaces, and other emerging technologies. This general class of thin films can be switched rapidly between...