337 Result(s)
within
Zhigang **
Characterization and Evaluation of Materials
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Article
Effect of rare earth element additions on the microstructure and mechanical properties of tin-silver-bismuth solder
There are numerous intermetallic compounds (IMCs) with various shapes in a tin-silver-bismuth solder alloy. These IMCs can affect the mechanical properties of the solder and, therefore, the reliability of the ...
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Article
Photocatalytic Properties and Electronic Structure of a Novel Series of Solid Photocatalysts, Bi2 RNbO7 (R = Y, Rare Earth)
The observation of photocatalytic properties and the electronic structure of a new series of rare earth photocatalysts, BiRNbO7 (R = Y, rare earth), are reported for the firstly time. Polycrystalline samples of B...
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Article
Properties of lead-free solder SnAgCu containing minute amounts of rare earth
Because of excellent wetting and mechanical properties, SnAgCu solder alloys have been regarded as the most promising Pb-free substitutes for the SnPb solder. The Sn-3.8Ag-0.7Cu solder has garnered attention b...
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Article
Bulk and interior packing densities of random close packing of hard spheres
The packing densities of random close packing of equal hard spheres (RCPHS) are studied. The RCPHS is generated by a rearrangement algorithm with an optimization subroutine. Traditionally defined packing densi...
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Article
Nucleation And Growth of Yttria-Stabilized Zirconia Thin Films Using Combustion Chemical Vapor Deposition
Liquid fuel combustion chemical vapor deposition technique was successfully used for YSZ thin film processing. The nucleation rates were obtained for the samples processed at different temperatures and total-m...
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Article
An Inverter Woven from Flat Component Fibers for e-Textile Applications
In the most fundamental approach, e-Textile circuits will be made by weaving component fibers into circuits. The weaving pattern will determine the circuit function. A key requirement of such e-Textile circuit...
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Article
Evaluation of Mixing Rules for Dielectric Constants of Composite Dielectrics by MC-FEM Calculation on 3D Cubic Lattice
Effective dielectric constants of diphase composite dielectrics are simulated by Monte Carlo-finite element method on three-dimensional lattice. Effective dielectric constants with coefficients of variation le...
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Article
Super-elastic Gold Conductors on Elastomeric Substrates
3-D displays, sensor skins, mechatronic structures, and e-textiles will rely on deformable and stretchable electronic circuits. It is likely that such circuits will be made of rigid semiconductor islands inter...
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Article
A Method for Making Elastic Metal Interconnects
Stretchable, elastic metal interconnects are a key to the fabrication of 3-D conformal circuits and electrotextiles. The basic concept for reversibly stretchable, elastic metallization is a corrugated stripe o...
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Article
Pulsed Laser Deposition Parameter Optimization for Growth of Alumina (Al2O3) Thin Film on Silicon (100)
Pulsed laser deposition (PLD) technique was used to grow alumina (Al2O3) thin films on (100) silicon substrate under different deposition conditions. The relationship between Al2O3 thin film thickness, hardness, ...
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Article
Quantitative characterization of microstructures of liquid-phase-sintered two-phase materials
Many powder metallurgy materials have a common microstructure character—spherical or equiaxed particles embedded in a matrix. This article presents an analytical approach that establishes relationships between...
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Article
Constitutive relations on creep for SnAgCuRE lead-free solder joints
Taking the most promising substitute of the Sn-3.8Ag-0.7Cu solder as the research base, investigations were made to explore the effect of rare earths (REs) on the creep performance of the Sn-3.8Ag-0.7Cu solder...
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Article
Extinguishment of Cooking Oil Fires by Water Mist Fire Suppression Systems
A series of full-scale experiments were conducted in a mock-up commercial cooking area to study extinguishing mechanisms and effectiveness of water mist against cooking oil fires. The impact of water mist char...
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Article
Fabrication of Nanoporous Silica Nanospheres and Nanotubes by Inorganic and Organic Double Templates
Inorganic and organic double templates were used to fabricate silica nanospheres and nanotubes with nanochannels perpendicular to the shells. Sphere and needle like CaCO3 nanoparticles, synthesized by a high grav...
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Article
Exploration of Electrophoretic Deposition of YSZ Electrolyte for Solid Oxide Fuel Cells
The suspensions of yttria stabilized zirconia (YSZ) were prepared in pure acetylacetone and ethanol and their mixtures. In all of the suspensions, YSZ thin films were obtained using electrophoretic deposition ...
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Article
Theoretical and Experimental Studies of Longitudinal Guided Wave Generation in Hollow Cylinders by Multielement Transducers
Numerical simulation and experimental investigation on defect detection in pipes using ultrasonic guided waves are carried out in the paper. In theoretical analysis, normal mode expansion method is used to qua...
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Article
Prediction of properties of Al2O3-C refractory based on microstructure by an improved generalized self-consistent scheme
An improved generalized self-consistent scheme (GSCS), which has a simplified computation process, was proposed to predict the properties, based on microstructure, of multiphase materials. The results of the p...
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Article
How Stretchable Can We Make Thin Metal Films?
Thin metal films deposited on elastomeric substrates can remain electrically conducting at tensile strains up to ~∼00%. We recently used finite-element simulation to explore the rupture process of a metal film...
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Article
Sol-gel synthesis and characterization of the photocatalyst BaCo1/3Nb2/3O3
The photocatalyst BaCo1/3Nb2/3O3 has been synthesized at 750°C by using a sol-gel process, and the surface area is 19.70 m2/g. While the surface area of the powder synthesized by using a solid state reaction proc...
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Article
An analysis of grain boundaries and grain growth in cemented tungsten carbide using orientation imaging microscopy
Tungsten carbide grains are usually prism-shaped triangular platelets in cemented tungsten carbide materials, owing to the highly anisotropic nature of tungsten carbide grains. The misorientation distribution ...
