K.I. Johnson

ORCID: 0000-0002-1269-5132
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About
Contact & Profiles
Research Areas
  • Nuclear and radioactivity studies
  • Metal Forming Simulation Techniques
  • Metallurgy and Material Forming
  • Supercapacitor Materials and Fabrication
  • Nuclear Materials and Properties
  • Risk and Safety Analysis
  • Microstructure and mechanical properties
  • Graphite, nuclear technology, radiation studies
  • Conducting polymers and applications
  • Aquatic Invertebrate Ecology and Behavior
  • Fatigue and fracture mechanics
  • Advanced Battery Technologies Research
  • Thermochemical Biomass Conversion Processes
  • Advanced Sensor and Energy Harvesting Materials
  • Advancements in Battery Materials
  • Environmental remediation with nanomaterials
  • Food Waste Reduction and Sustainability
  • Aluminum Alloy Microstructure Properties
  • Advancements in Solid Oxide Fuel Cells
  • Metal and Thin Film Mechanics
  • Advanced Battery Materials and Technologies
  • Iron and Steelmaking Processes
  • Aluminum Alloys Composites Properties
  • Fuel Cells and Related Materials
  • Advanced Welding Techniques Analysis

University of Cincinnati
2019-2024

Lawrence Livermore National Laboratory
2022

University of Minnesota, Duluth
2020

St. Peter's Institute of Higher Education and Research
2020

Rowan University
2018

Pacific Northwest National Laboratory
1995-2014

United States Department of Energy
1996

National Technical Information Service
1987

Garrett Technologies (United States)
1984

Syracuse University
1967

The present work is concerned with determining the factors controlling adhesion of metal couples. Most previous studies have been done in presence contaminants and, under these conditions, an energy barrier for has always observed. This ascribed to various factors: need disperse so that metal-metal contact consequently, adhesion, can occur; required realign surface atoms form interfacial bond; lightly loaded necessity overcome elastic relief stresses which may break any bond formed during...

10.1063/1.1709780 article EN Journal of Applied Physics 1967-03-15

10.1016/s0749-6419(98)00051-5 article EN International Journal of Plasticity 1998-12-01

Degradation of material properties by high-pressure hydrogen is an important factor in determining the safety and reliability materials used storage delivery. Hydrogen damage mechanisms have a time dependence that linked to outgassing after exposure atmosphere makes ex situ measurements mechanical problematic. Designing measurement instruments for challenging due known incompatibility with many metals standard high-power motor such as Nd. Here we detail design operation solenoid based...

10.1063/1.4899315 article EN Review of Scientific Instruments 2014-10-01

Gasification is an important method of converting coal into clean-burning fuels and high-value industrial chemicals. However, gasifier reliability can be severely limited by rapid degradation the refractory lining in hot-wall gasifiers. This paper describes integrated approach to provide experimental data engineering models needed better understand how control operation for extended life. The program includes slag viscosity testing measurement penetration refractories as a function time...

10.1021/ef900101a article EN Energy & Fuels 2009-04-20

Metallic-adhesion experiments reported in the literature have shown that softer metal couples could weld more easily than harder, and of hexagonal atomic structure are difficult to those cubic structure. Because presence contamination all these studies, however, it has not been clear whether tendencies intrinsic properties metals, or simply due a difference sensitivity materials such contamination. Previous studies by authors principal barrier adhesion between soft metals at room temperature...

10.1116/1.1492532 article EN Journal of Vacuum Science and Technology 1967-05-01

In this paper, we present two levels of electrochemical modeling for solid oxide fuel cells: cell continuum and microscale electrochemistry. The electrochemistry model simulates the performance porous electrode materials based on microstructure material, distribution reaction surfaces, transport oxygen ions through material. overall current-voltage relations are obtained using form basic input to level model. calculates current electrical density, voltage, heat production in stacks with H2...

10.1615/intjmultcompeng.v3.i1.30 article EN International Journal for Multiscale Computational Engineering 2005-01-01

During inertial confinement fusion experiments at the National Ignition Facility (NIF), a capsule filled with deuterium and tritium (DT) gas, surrounded by DT ice layer high-density carbon ablator, is driven to temperature densities required initiate fusion. In indirect method, 2 MJ of NIF laser light heats inside gold hohlraum radiation 300 eV; thermal x rays from interior couple create central hotspot tens millions degrees Kelvin density 100-200 g/cm3. interaction wall, m-band are produced...

10.1063/5.0101695 article EN publisher-specific-oa Review of Scientific Instruments 2022-11-01

The development of new flexible and lightweight electronics has increased the demand for compatible energy storage devices to power them. Carbon nanotube (CNT) fibers have long been known their ability be assembled into yarns, offering integration electronic devices. They are hindered, however, by low intrinsic properties. Herein, we report a novel composite yarn, synthesized through solvothermal processes, that attained densities in range between 0.17 µWh/cm2 3.06 µWh/cm2, 0.26 mW/cm2 0.97...

10.3390/c7030062 article EN cc-by C – Journal of Carbon Research 2021-08-14
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