A5042826546- Advanced ceramic materials synthesis
- Nuclear Materials and Properties
- High-Temperature Coating Behaviors
- Fiber-reinforced polymer composites
- Advanced materials and composites
- Mechanical Behavior of Composites
- Metal and Thin Film Mechanics
- Graphene research and applications
- Fusion materials and technologies
- Tendon Structure and Treatment
- Advanced Surface Polishing Techniques
- Supercapacitor Materials and Fabrication
- High Entropy Alloys Studies
- Lower Extremity Biomechanics and Pathologies
- Polymer crystallization and properties
- Aluminum Alloys Composites Properties
- Foot and Ankle Surgery
- Advanced Materials and Mechanics
- Advanced Sensor and Energy Harvesting Materials
- Numerical methods in engineering
- High Temperature Alloys and Creep
- Mechanical Failure Analysis and Simulation
- Electromagnetic Effects on Materials
- Tribology and Wear Analysis
- Metal Alloys Wear and Properties
University of Virginia
2015-2023
James Madison University
2022
Pennsylvania State University
2022
Colorado School of Mines
2022
With rising energy concerns, efficient conversion and storage devices are required to provide a sustainable, green supply. Solar cells hold promise as due their utilization of readily accessible solar energy; however, the output can be non-continuous unstable. Therefore, it is necessary combine with compatible realize stable power To this end, supercapacitors, highly devices, integrated mitigate fluctuations. Here, we report on development cell-supercapacitor hybrid device solution...
The superlative strength-to-weight ratio of carbon fibers (CFs) can substantially reduce vehicle weight and improve energy efficiency. However, most CFs are derived from costly polyacrylonitrile (PAN), which limits their widespread adoption in the automotive industry. Extensive efforts to produce low cost, alternative precursor materials have failed yield a commercially viable product. Here, we revisit PAN study its conversion chemistry microstructure evolution, might provide clues for...
As the demand for electric vehicles (EVs) and autonomous (AVs) rapidly grows, lower-cost, lighter, stronger carbon fibers (CFs) are urgently needed to respond consumers' call greater EV traveling range safety structures AVs. Converting polymeric precursors CFs requires a complex set of thermochemical processes; systematic understanding each parameter in fiber conversion is still, large extent, lacking. Here, we demonstrate effect carbonization temperature on ring structure formation by...
As various property studies continue to emerge on high entropy and entropy-stabilized ceramics, we seek a further understanding of the changes across phase boundary between “high-entropy” “entropy-stabilized” phases. The thermal mechanical properties bulk ceramic stabilized oxide composition Mg0.2Co0.2Ni0.2Cu0.2Zn0.2O are investigated this critical transition temperature via transient plane-source method, temperature-dependent x-ray diffraction, nano-indentation. conductivity remains...
Abstract A new, in situ hermeticity testing apparatus has been developed to allow helium leak evaluation of ceramic tubes, including nuclear‐grade SiC/SiC fuel cladding matrix composites (CMC), during four‐point bending with simultaneous monitoring local deformation and damage, using stereoscopic digital image correlation (DIC) acoustic emissions. The capabilities the experimental are demonstrated alumina, borosilicate glass, 4130 steel tubes representative dimensions then applied study...
Abstract Here, we unveil a methodology for novel assessment of the fracture mechanics SiC/SiC ceramic matrix composites enabled by in situ stereoscopic digital image correlation to quantify in‐process flexural strain and crack opening displacement measurements. This technique isolates individual cracks on composite surface as discontinuities spatial field correlates key characteristics with specimens during coupled four‐point bend / hermeticity testing. Fracture was observed along specimen...
Abstract The performance of braided ceramic matrix composites has been shown to depend on the spatial arrangement tows; therefore, a new class tools is required measure irregularities in composite architecture for components with intricate geometries. We report scalable and robust reconstruction technique built upon stereoscopic digital image correlation that able efficiently position tows arbitrarily shaped composites. This method was applied triaxially tubes intended use as nuclear fuel...
Abstract Plain weave planar and biaxially braided tubular SiC/SiC CMCs are evaluated in tension four‐point bending, respectively, at ambient conditions. Custom‐designed fixtures for CMC testing developed each loading mode coupled with three‐dimensional digital image correlation. Stereoscopic correlation analysis reveals crack initiation failure sites to provide insight into stress redistribution mechanisms. Scanning electron microscopy is performed postmortem determine the influence of...
Abstract An understanding of the constitutive properties carbon fibers (CFs) is critical to accuracy high-resolution composite simulations and development CF derived from low-cost alternative precursor materials. Single-fiber tensile testing a capable tool measure well suited research efforts where only small number may be available. However, single-fiber tests are challenging conduct due difficulty in handling diameter (5–15 μm), brittleness single fibers, required nanoscale/microscale...
As various property studies continue to emerge on high entropy and entropy-stabilized ceramics, we seek further understanding of changes across the phase boundary between \enquote{high-entropy} \enquote{entropy-stabilized}. The thermal mechanical properties bulk ceramic stabilized oxide composition Mg$_{0.2}$Co$_{0.2}$Ni$_{0.2}$Cu$_{0.2}$Zn$_{0.2}$O are investigated this critical transition temperature via transient plane-source method, temperature-dependent X-ray diffraction,...