Larry Thomas

Exploring the crick-tip mechanisms driving environmental degradation of alloys through controlled oxidation study of alloyed nanoparticles

Lead Institution

Environmental Molecular Sciences Laboratory

Principal Investigator

Chongmin Wang

Project type

Exploratory Research

Nanoparticles offer a unique way to observe the formation of small voids produced by vacancy injection during early stages of oxidation without sample cutting or polishing. Recent work at PNNL on…

Advanced microstructural analysis of environmental degradation using site-specific transmission electron microscopy and atom-probe tomography

Lead Institution

Pacific Northwest National Laboratory

Principal Investigator

Daniel Schreiber

Project type

Exploratory Research

Environmental degradation of Ni-based alloys continues to be a major problem in high-temperature water environments such as those found in nuclear reactors and steam generators. Despite several…

Advanced microstructural analyses of materials degradation and atomic transport in extreme environments

Lead Institution

Pacific Northwest National Laboratory

Principal Investigator

Daniel Schreiber

Environmental degradation is a major problem in high-temperature water environments such as those found in nuclear reactors and other forms of steam generator and high-temperature turbine…

Exploring the Mechanistics of Stress Corrosion Cracking Through Fundamental Studies of Material Degradation in Hostile Environments

Lead Institution

Pacific Northwest National Laboratory

Principal Investigator

Daniel Schreiber

Environmental degradation is a vital concern in high-temperature, hostile environments found in current and future generation power generation systems. Despite decades of research, there is no…

SEM Characterization of Proposed Hydrogen Storage Materials

Lead Institution

Pacific Northwest National Laboratory

Principal Investigator

Larry Thomas

Project type

Exploratory Research

The Leo 982 field-emission SEM at EMSL will be used for microscopic and elemental characterization of sodium-aluminate alanate or similar material being studied for as a hydrogen storage medium. An…

3-D Profililng of cross-sectional TEM samples

Lead Institution

Pacific Northwest National Laboratory

Principal Investigator

Larry Thomas

Project type

Exploratory Research

Exploratory us of Steroecon program for 3-D reconstruction of nanoporosity and cracks in environmentally attacked materials

Lead Institution

Pacific Northwest National Laboratory

Principal Investigator

Larry Thomas

Project type

Capability Research

Recent transmission electron microscopy investigations of corrosion and stress-corrosion cracking in steam-generator materials have shown the potential importance of nanoporous microstructures in…

Site-Specific Sample Preparation of Surfaces and Buried Interfaces
for TEM and Atom Probe Analysis

Lead Institution

Pacific Northwest National Laboratory

Principal Investigator

Larry Thomas

Project type

Capability Research

Technique development of methods for preparing cross-sectional TEM samples and atom-probe needle samples with the new dual-beam FIB instrument is proposed. Prior experience in FIB sample preparation…

Site-Specific Sample Preparation of Surfaces and Buried Interfaces
for TEM and Atom Probe Analysis

Lead Institution

Pacific Northwest National Laboratory

Principal Investigator

Matthew Olszta

Project type

Large-Scale EMSL Research

Technique development of methods for preparing cross-sectional TEM samples and atom-probe needle samples with the new dual-beam FIB instrument is proposed. Prior experience in FIB sample preparation…

EMSL Science Overview

Larry Thomas

Projects

Exploring the crick-tip mechanisms driving environmental degradation of alloys through controlled oxidation study of alloyed nanoparticles

Advanced microstructural analysis of environmental degradation using site-specific transmission electron microscopy and atom-probe tomography

Advanced microstructural analyses of materials degradation and atomic transport in extreme environments

Exploring the Mechanistics of Stress Corrosion Cracking Through Fundamental Studies of Material Degradation in Hostile Environments

SEM Characterization of Proposed Hydrogen Storage Materials

3-D Profililng of cross-sectional TEM samples

Exploratory us of Steroecon program for 3-D reconstruction of nanoporosity and cracks in environmentally attacked materials

Site-Specific Sample Preparation of Surfaces and Buried Interfaces
for TEM and Atom Probe Analysis

Site-Specific Sample Preparation of Surfaces and Buried Interfaces
for TEM and Atom Probe Analysis