A5069643893- High-Temperature Coating Behaviors
- Sports injuries and prevention
- Advanced Materials Characterization Techniques
- High-Velocity Impact and Material Behavior
- Nuclear Materials and Properties
- Nuclear and radioactivity studies
- Microstructure and Mechanical Properties of Steels
- Pickering emulsions and particle stabilization
- Microstructure and mechanical properties
- Metallurgical Processes and Thermodynamics
- Intermetallics and Advanced Alloy Properties
- Micro and Nano Robotics
- Ion-surface interactions and analysis
- Surface Modification and Superhydrophobicity
- Structural Response to Dynamic Loads
- Catalytic Processes in Materials Science
- Microfluidic and Bio-sensing Technologies
- Engineering and Material Science Research
- Metallurgy and Material Forming
- Silicone and Siloxane Chemistry
- Quantum-Dot Cellular Automata
- Rocket and propulsion systems research
- Delphi Technique in Research
- Orbital Angular Momentum in Optics
- Library Science and Information Systems
Radikal Therapeutics
2025
RTX (United States)
2020-2022
Hartford Financial Services (United States)
2013-2021
DuPont (United States)
2014-2016
Wilmington University
2014-2016
Experimental Station
2016
Johns Hopkins University Applied Physics Laboratory
2009-2013
Johns Hopkins University
2008-2012
International Vedic Hindu University
2012
University of Illinois Urbana-Champaign
2012
Modeled after the design of eukaryotic protozoa, we fabricated artificial microscopic swimmers through dipolar assembly a bidisperse mixture 250 nm superparamagnetic magnetite colloids and 24 ferromagnetic cobalt nanoparticles. The nanoparticles self-assemble into long, 1-D chains measuring approximately × 5 µm. These then co-assemble with beads to form "head" + "tail" structures. types asymmetric "flagella-like" colloidal assemblies were formed maintained solely interactions is first...
<title>Abstract</title> Energy efficiency of heat engines (gas and steam turbines) for electricity production propulsion scale with operating temperature following the Carnot cycle. Commercial Ni- Co-based superalloys melt near 1500°C rapidly lose mechanical strength beyond 1000°C. Refractory metals well above 2000°C but have inherent manufacturability challenges, like high ductile-to-brittle transition temperatures, that are significant barriers to adoption. Using density-functional theory...
A moisture-sensitive diisocyanate liquid is microencapsulated within a metal shell measuring less than 2 μm thick and 50 in diameter. This mild synthesis takes place through series aqueous processing steps that occur at or near room temperature. Through combination of emulsification, interfacial polymerization, electroless plating, one can microencapsulate moisture- air-sensitive chemicals seal. The liquid-filled microcapsules promise number advantages compared to conventional polymeric...
Taking inspiration from eukaryotic cilia, we report a method for growing dense arrays of magnetically actuated microscopic filaments. Fabricated the bottom-up assembly polymer-coated cobalt nanoparticles, each segmented filament measures approximately 5–15 µm in length and 23.5 nm diameter, which was commensurate with width single nanoparticle. A custom microscope stage actuates filaments through orthogonal permanent alternating magnetic fields. We implemented design experiments (DOE) to...
Titanium alloy, Ti-6Al-4 V, and commercially pure (CP) will be used to protect the Solar Probe Plus (SPP) spacecraft against hypervelocity impacts by solar dust particles. The results of six impact (HVI) tests performed on V CP monolithic samples (3 each) are evaluated in terms cratering spall damage, compared with crater depth initiation predictions using Ballistic Limit Equation (BLE) for shields developed at NASA Johnson Space Center hydrocode computations. In tests, 2017-T4 aluminum...
The effect of pure tin deposition method on the propensity to form whiskers was studied over course one year. Deposition methods employed include matte and bright electroplating, electroless plating, sputtering, evaporation (crucible resistive electron beam). Films produced under high vacuum, via beam or DC were found whisker immediately, while electroplated plated films took 9 weeks whiskers. formed by electroplating displayed no starts after more than a year ambient aging. Film thickness...
Abstract
We describe a method for fabricating biologically inspired hierarchical surfaces in single step through surfactant self-assembly at an oil/water interface. The key to this system is the use of polydimethylsiloxane-diacrylate oil phase, which makes it possible solidify these delicate structures with UV photocuring. Scanning electron microscopy (SEM) and 3-D optical profilometry reveals morphologies that capture randomness, fractal geometry, organization natural materials. morphology...
Abstract A new alloy with high chromium has shown excellent resistance to corrosion in combustion atmospheres like those produced low NOx coal-fired power boilers. This material is Alloy 33 (UNS R20033) and contains approximately 33% chromium. Chromium well known as a key addition improve sulfidation, which the major mechanism boilers using technologies. In addition, shows less segregation of alloying elements than currently used materials when welded condition; welds been suggested playing...