Materials Literature
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Sensitivity of energetic material is traditionally evaluated in a drop weight test by a go‐no‐go ignition condition on an unconfined sample. In contrast to this, the Steven test uses a semi‐confined energetic material to evaluate the post ignition violence. Frictional conditions can alter the results of both these tes…
We investigate the kinetics of crystal growth by measurements of the dendrite growth velocity as a function of undercooling during nonequilibrium solidification. Measurements are conducted under different conditions of convection. The liquid samples are levitated and undercooled in strong alternating electromagnetic f…
Spectroscopic ellipsometry (SE) and resistivity measurements were used to characterize Nickel‐metal films used for self‐aligned silicidation process. Variable angle spectroscopic ellipsometer (VASE) in the VUV range of wavelengths was used to measure the thickness and optical properties of Nickel films. The thickness‐…
In order to study the nature of the liquid phase numerically, we need a computer simulation method which will yield the dynamical properties of the liquid. In this work, the method of Madden et al. (Castiglione, M.; Wilson, M., Madden, P.A. Phys. Chem. Phys. 1999, 1, 165.) was used within a molecular dynamics calculat…
A SiC/(ZrB2-SiC/SiC)4 coating was prepared by slurry painting and pulse CVD. The composition and structure of the coating were studied by using XRD,SEM and EDS analysis,then the anti-oxidation property of the coating was investigated. The results show that the thickness of obtained coating is about 100μm,ZrB2-SiC laye…
The microwave absorbing properties of the NaOH-treated MWNTs/Epoxy composites were investigated.By changing the concentration of the NaOH solution used to treat the multi-walled carbon nanotubes at high temperature,the maximum absorption frequency,absorption strength and band width can be adjusted.Under the experiment…
Normal four-layer-Ba0.6Sr0.4TiO3(BST) films and two new types of BST films were prepared on Pt/Ti/SiO2/Si substrates by sol-gel method.For the first new type of films composed of four layers,the first layer was preheat-treated(PT) in the preparing process;while for the second new type of films consisted of eight layer…
The hydrophobicity,hydrophobicity recovery at different temperature,mechanical and electrical performance of hightemperature vulcanization silicone rubber(HTV-SR) exposed to needle-plate electrode corona discharge were investigated,and the damage phenomenon and molecular structure change of silicone rubber by corona d…
In this study, the basic research verifying possibility of applications as radiology image sensor in Digital Radiography was performed, the radiology image sensor was fabricated using a multi-layer technique to decrease dark current. High efficiency materials in substitution for Amorphous Selenium(a-Se) have been stud…
Although many analytical, experimental and numerical studies have focused on droplet motion, the mechanics of the droplet while still in its static state, and just before motion starts, are not well understood. A study of static droplets would shed light on the threshold voltage (or critical inclination) for initiatin…
5at%Yb3+,2at％Er3+:YAG transparent ceramics possessing a high transmittance was sintered at 1760℃ for 30 h by solid-state method and vacuum sintering technique. The sample exhibited pore-free structure and had no secondary phase in the grain boundary and in the grain, as observed in the SEM photograph. The sample's abs…
Er3+ doped and Er3+/Yb3+ co-doped superfine LaF3 powders are prepared using co-precipitation method. The sample shows spherical particles with size of about 250 nm. The quantum efficiencies of 4S3/2 and 4F9/2 levels in the prepared Er3+ doped LaF3 powders are calculated to be 67.0% and 71.9%, respectively. With the en…
This chapter contains sections titled: Introduction Single-Pixel and Imaging Systems The Eikonal Equation Refractive Focusing Elements Zoned Lenses Zone Plate Lenses Metallic Lenses Reflective Focusing Elements Bibliographic Notes
Development of a rational synthetic method of flexible nanomaterials may enable exciting avenues in both fundamental research and novel device applications. In this paper, flexible boron nanowires have been successfully synthesized on both Si (111) and scanning tunneling microscope (STM) tungsten (W) tips via thermore…
The generalized continual hole gas model and Monte Carlo simulations were used to study the growth of colonies and lamellar segregations in the decomposition of metastable phases. The morphology of segregations qualitatively changed as the temperature decreased and depended substantially on the initial state (the pres…
The artificial neural network technique is used to model the relationship between the yarn properties, fabric parameters and weft shear stiffness of worsted fabrics. At first, the yarn properties and fabric parameters are selected using an input variable selection method This method takes both the human knowledge on t…
Dense and cellular yttria-tetragonal zirconia polycrystal (Y-TZP) bodies were produced by using a natural gelatine and two different agars as gelling agents, while commercial polyethylene (PE) spheres were added (125 to 300 μm diameter) as a volatile pore forming agent to create 50-65 vol% spherical macro-pores, unifo…
TiNi films are well known as a typical shape memory alloy (SMA), and are expected to be promising materials for micro actuators. The film crystallization needed for making the shape memory property appear had been usually realized by high temperature (above 450 C) annealing process during and/or after the sputtering d…
The effects of hydrogen on the fracture-toughness properties of Type 316L stainless steel from 175 K to 425 K were measured. Fracture-toughness samples were fabricated from Type 316L stainless steel forgings and hydrogen-charged with hydrogen at 34 MPa and 623 K for two weeks prior to testing. The effect of hydrogen o…
Nanocomposites are novel materials that are receiving great attention from the aerospace community because of the inherent high strength and stiffness of the nanotubes/nanofibres embedded in the nanocomposite matrix. These features are particularly appealing to aircraft designers who strive to produce long lasting and…