A5000921224- Microstructure and mechanical properties
- Metal and Thin Film Mechanics
- Metallic Glasses and Amorphous Alloys
- High-Temperature Coating Behaviors
- High Entropy Alloys Studies
- Crystallization and Solubility Studies
- X-ray Diffraction in Crystallography
- High Temperature Alloys and Creep
- Adhesion, Friction, and Surface Interactions
- Force Microscopy Techniques and Applications
- Advanced materials and composites
- Aluminum Alloys Composites Properties
- Fatigue and fracture mechanics
- Glass properties and applications
- Additive Manufacturing Materials and Processes
- Nuclear Materials and Properties
- Advanced Welding Techniques Analysis
- Magnesium Alloys: Properties and Applications
- Diamond and Carbon-based Materials Research
- Intermetallics and Advanced Alloy Properties
- Advanced Materials Characterization Techniques
- Mechanical stress and fatigue analysis
- Metal-Organic Frameworks: Synthesis and Applications
- Microstructure and Mechanical Properties of Steels
- Electrospun Nanofibers in Biomedical Applications
Northwest University
2023-2025
University of Tennessee at Knoxville
2015-2024
University of Tennessee System
2022-2024
China University of Geosciences
2024
Energy Foundation
2024
Knoxville College
2011-2022
Zhongyuan University of Technology
2017-2022
Beijing University of Civil Engineering and Architecture
2019-2021
Joint Institute for Computational Sciences
2021
Oak Ridge National Laboratory
2010-2019
Abstract Interest in two-dimensional (2D) van der Waals materials has grown rapidly across multiple scientific and engineering disciplines recent years. However, ferroelectricity, the presence of a spontaneous electric polarization, which is important many practical applications, rarely been reported such so far. Here we employ first-principles calculations to discover branch 2D family, based on In 2 Se 3 other III -VI materials, that exhibits room-temperature ferroelectricity with...
Abstract Realizing improved strength–ductility synergy in eutectic alloys acting as situ composite materials remains a challenge conventional systems, which is why high-entropy (EHEAs), newly-emerging multi-principal-element category, may offer wider possibilities. Here, we use an AlCoCrFeNi 2.1 EHEA to engineer ultrafine-grained duplex microstructure that deliberately inherits its lamellar nature by tailored thermo-mechanical processing achieve property combinations are not accessible...
The indentation size effect is one of several effects on strength for which “smaller stronger.” Through use geometrically self-similar indenters such as cones and pyramids, the manifested an increase in hardness with decreasing depth penetration becomes important at depths less than approximately 1 μm. For spherical indenters, diameter sphere most length scale; spheres diameters 100 μm produce measurably higher hardnesses. We critically review experimental observations effect, focusing...
Numerical simulations of crack initiation which use a cohesive zone law to model weak interface in the solid are often limited by occurrence an elastic snap-back instability. At point instability, quasi-static finite element computations unable converge equilibrium solution, usually terminates calculation and makes it impossible follow post-instability behaviour. In this paper, we show that such numerical difficulties can easily be avoided introducing small viscosity constitutive equations...
We show that it is possible to distinguish between homogeneous and heterogeneous dislocation nucleation on the basis of differences in experimentally measured theoretical strengths. From nanoindentation tests, critical shear stress for two different Mo-alloy single crystals (Mo-3Nb Mo-10Al-4Ni) found be $\ensuremath{\sim}1∕8$ modulus. The corresponding uniaxially compressed Mo-10Al-4Ni micropillars $\ensuremath{\sim}1∕26$ This strength difference due higher required nucleate a full loop...
Oxide self-assembly is a promising bottom-up approach for fabricating new composite materials at the nanometer length scale. Tailoring properties of such systems wide range electronic applications depends on fundamental understanding interfaces between constituent phases. We show that nanoscale strain modulation in self-assembled made high-Tc superconducting films containing nanocolumns BaZrO3 strongly affects oxygen composition superconductor. Our findings explain observed reduction...
A novel 3D microporous compound [Zn3(Httca)2(4,4'-bpy)(H2O)2]n (MOF-COOH) containing uncoordinated carbonyl groups pointing to the pores was prepared. The in channels can act as postsynthetic modification sites for cation exchange. MOF-COOH effectively and selectively serve an antenna sensitizing visible-emitting Tb(3+) cation.
To reveal the structural origin responsible for sharp change of fracture mode on as-cast and thermally-relaxed status, we use nanomechanical testing to measure stresses onset plasticity a metallic glass develop stochastic statistical model, which can be used characterize heterogeneity (defect density strength) inside glass. Our experiments calculations found that, with increasing relaxation, defect drops by two orders magnitude. Correspondingly, glasses changes from significantly plastic...
In our efforts toward the rational design and systematic synthesis of porous 3D MOFs, three frameworks Zn-MOFs ([Zn(BDC)(TIB)]·3H2O (Zn-MOF-1) (TIB = 1,3,5-tri(1H-imidazol-1-ly) benzene H2BDC 1,4-dicarboxybenzene), [Zn(BDA)(TIB)2/3]n (Zn-MOF-2) (H2BDA 4,4′-biphenyl-dicarboxylic acid) [Zn3(BDC)2(BDA)(TIB)2]n (Zn-MOF-3)) were successfully synthesized, based on different multicarboxylate ligands through solvothermal reactions. The resulting MOFs show similar structures with pore sizes which...
Abstract There have been numerous efforts to develop creep-resistant materials strengthened by incoherent particles at high temperatures and stresses in response future energy needs for steam turbines thermal-power plants. However, the microstructural instability of incoherent-particle-strengthened ferritic steels limits their application below 900 K. Here, we report a novel alloy with excellent creep resistance enhanced coherent hierarchical precipitates, using integrated experimental...