Developments in EBSD Pattern Background Removal, Band Detection and Indexing for Improved Data Quality and Ease of Use
Extended abstract of a paper presented at Microscopy and Microanalysis 2012 in Phoenix, Arizona, USA, July 29 – August 2, 2012.
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Research on preparation and properties of PI-EP composite material
A series of PI-EP composite materials under different imidization temperature gradients were prepared from 3,3'-diethyl-4,4'-diamino diphenyl methane (DEDA DPM), benzop-henone tetracarboxylic acid dianhydride (BTDA) and epoxy resin (E-51), and thermal imide process was used. Fourier transform infrared spectroscopy (FI…
On the study of the stress-strain state of the IVV.10M reactor vessel and in-vessel components under seismic impacts
The problem of the seismic stability of the new IVV.10M research reactor is considered. To computationally prove the viability of the engineering solutions, a detailed finite element model of a reactor is developed in strict accordance with the design documentation. The model represents the actual interrelations betwe…
Numerical Investigation on the Plastic Response of a Small-Scale Laterally Impacted Tanker Double Hull Structure
Numerical simulations are presented, on the dynamic response of a one-tenth scaled tanker double hull structure struck laterally by a knife edge indenter. The small stiffeners of the full-scale prototype are smeared in the small-scale model by increasing the thicknesses of the corresponding plates. The dynamic respons…
Computer simulated extracted parameters of induction motor for unequal variation in state of degradation of insulation in all three-phases
The variation in state of degradation of stator winding insulation in induction motor results in the state of unbalance in three-phase stator current at fundamental frequency. The computer simulation model to determine this state of unbalance is subsequently developed and presented in the previous research paper. On t…
Imaging and Analysis of Microbially Induced Calcium Carbonate Precipitates and Biofilm at the Center for Biofilm Engineering, Montana State University
Extended abstract of a paper presented at Microscopy and Microanalysis 2012 in Phoenix, Arizona, USA, July 29 – August 2, 2012.
Graphene-based passive mode-lockers for ultra-fast pulse lasers
With the evanescent field interaction scheme, graphene is employed to realize passive mode-lockers operating in highpower regime. Also, highly efficient optical deposition and mechanical exfoliation of graphene are demonstrated for ultrafast pulse generation.
A description of the experimental microwave discharge behavior versus pressure, power and reactor geometry for MPACVD diamond synthesis reactors
Recently two new microwave plasma-assisted chemical vapor deposition (MPACVD) diamond synthesis reactors [1,2] were designed, built and experimentally evaluated and their performance was compared to earlier MPACVD reactor designs [3]. In order to take advantage of the improved CVD diamond synthesis conditions that occ…
Influences of Hydrogenation on Tensile Properties of Ti40 Alloy
The influence of hydrogenation on microstructure and tensile properties of Ti40 alloy has been investigated. The microstructure observation reveals that a new phase called η phase with FCC structure appears at the grainboundaries when the hydrogen content above 0.3 wt.%. With increasing hydrogen contents, the strength…
Preparation of Pine Char Sulfonic Acids with High Acid Capacity Using Phosphoric Acid as a Dehydration Catalyst
A series of pine char sulfonic acids were prepared via a two-step procedure involving phosphoric acid catalytic charring of pine sawdusts and successively sulfonation of the charred precursors. Solid sulfonic acid material prepared in this new route possessed high sulfonic acid loading with 2.36 mmol g-1at the optimal…
Designation of freeform lenses for multiple light sources
Optical lenses with freeform surfaces possess good flexibility for design to generate diverse profiles of uniform illumination. However, most of the previous design formulation was applicable only for a single light source without offset. The formulation is extended for the applicability for multiple sources. The prop…
Production of extremely low energy electron beam with silicon-based field emitter arrays and its application to space charge neutralization of low-energy and high-current ion beam
An electron beam with an energy as low as 5 eV and a current of 0.1 mA was produced by an electron source with a 10,000-tip silicon-based field emitter array (Si-FEA). In order to decelerate the electrons, we have designed an electrostatic lens system for the divergent beam extracted from the FEA. Spatial distribution…
In-situ Observation of Solutions by WetSTEM
Extended abstract of a paper presented at Microscopy and Microanalysis 2012 in Phoenix, Arizona, USA, July 29 – August 2, 2012.
In-situ observation of microstructural changes and electro-mechanical behaviors on ZnO nanowires under thermal condition
Extended abstract of a paper presented at Microscopy and Microanalysis 2012 in Phoenix, Arizona, USA, July 29 – August 2, 2012.
Prediction of wear rate by friction of irradiated thermoplastic polymers in fluids
The effect of the mechanical characteristics of irradiated polymeric materials on the wear rate of pin-on-disk couples in fluid is studied. The study reveals a good correlation between the mechanical characteristics of cross-linked irradiated polymers and their wear rate. The proposed method allows prediction of the b…
Quantification of protein contamination on surfaces
Gas-plasma techniques are capable of destroying and removing both small organic molecules and larger biomolecular structures adhering to, or adsorbed on, a variety of surfaces without causing significant damage to the surfaces themselves. This has led to a large number of decontamination applications. However, while g…
Structural and Microstructural Analysis of K0.5Na0.5NbO3 Ceramics Doped with Strontium
Extended abstract of a paper presented at Microscopy and Microanalysis 2012 in Phoenix, Arizona, USA, July 29 – August 2, 2012.
Evolution of Ar metastable atom density with electron density in Ar ICP discharge
Summary form only given. Evolution of metastable argon atom density (1s5) with electron density (plasma power) was investigated with Laser Induced Fluorescence (LIF) in Ar ICP discharge. The laser at wavelength 696.5 nm was used to excite 1s5metastable state to 2p2state and measured the fluorescence of 772.4 nm emitte…
A study of direct optical transitions in silicon single crystals based on transmission spectra
The transmission spectrum of single-crystal silicon in the range of 2.75–3.25 eV has been obtained experimentally. An empirical formula is proposed to describe the spectral dependence of the optical density. The energy of the direct transition at the saddle point is found to be E(Γ15) − E(Γ25’) = 3.43 eV. Analysis of…
Effect of O2 Flow Rate on the Morphological and Optical Properties of ZnO Nanocrystals
The morphological and optical properties of ZnO nanocrystals prepared by thermal evaporation of Zn powders were studied at both upstream and downstream under different O2flow rates. The morphological evolution was observed by scanning electron microscopy. With O2flow rates changing from 0.25 sccm to 1 sccm, the caps o…