Electron Backscatter Diffraction in the SEM: A Tutorial
J R Michael; Electron Backscatter Diffraction in the SEM: A Tutorial, Microscopy and Microanalysis, Volume 8, Issue S02, 1 August 2002, Pages 724–725, https://d
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Embrittlement of Cu [001] symmetric tilt boundaries induced by Sb segregation
Abstract To investigate the misorientation dependence of fracture behavior and Sb segregation level for different [001] symmetric tilt boundaries in Cu–2.0 mass% Sb alloy bicrystals, tensile tests at several temperatures from 77 to 743 K and energy-dispersed X-ray spectroscopy analyses were performed. The degree of em…
Electric field behavior near a zero-angle contact point in the presence of surface conductivity
The paper describes the electric field behavior near a contact point in various arrangements with a zero contact angle when surface conductivity is present on a solid surface. Electric field distributions are calculated for arrangements with three contact conditions: point, line, and surface contact. We focus on the e…
A sensitive method for detecting the depletion of nonexchangealble potassium in the rhizosphere using a sequential extraction with 0.01 molar hydrochloric acid
To detect subtle depletion of nonexchangeable K occurring in the rhizosphere, extraction with a much weaker acid solution (0.01 m HCl) than that conventionally used (1 m HNO3, 1 m HCl) was attempted. Soils sampled from the rhizoboxes in which maize (Zea mays L.) had been growing for 17 d was sequentially extracted, fi…
Experimental Set-up of a Purely Electrostatic Monochromator for High Resolution and Analytical Purposes of a 200 KV TEM
Stephan Uhlemann, Max Haider; Experimental Set-up of a Purely Electrostatic Monochromator for High Resolution and Analytical Purposes of a 200 KV TEM, Micr
Determination of surface nanostructure from analysis of electron plasmon losses in XPS
Abstract We have explored the possibility of obtaining information about the surface nanostructure (i.e., how a given phase of material is distributed near to the surface region) from the analysis of loss plasmons that appear in the lower kinetic energy side of photoelectron and Auger peaks. First, we show an example…
Electrochemical Noise (ECN) Measurements as a Corrosion Monitoring Tool: A Review
The present article reviews the feasibility of electrochemical noise (ECN) measurements as a corrosion probe for monitoring corrosion changes on stainless steel 304L (UNS 30403). Controlled tests for ECN and weight lossmeasurements were conducted in 10% NaCI solution for stainless steel 304L (UNS 30403). Corrosion beh…
XPS study of fresh and oxidized (Pb,Ge)Te surfaces
Abstract The oxidation of (Pb,Ge)Te crystal surfaces at ambient temperature and humidity was studied by means of XPS in a time range from minutes to months. Vacuum‐cleaved crystal was used for the experiment. It was found that Ge in a PbTe lattice occupies two different positions. At one of them, donor behaviour is re…
Effect of electric field on the dielectric permittivity of betaine phosphite crystals in the paraelectric phase
Temperature dependences of the dielectric permittivity of betaine phosphite crystals are studied both without and under application of an electric bias. It is shown that, in view of the fact that the high-temperature improper ferroelastic (antiferrodistorsive) phase transition at T c 1 =355 K is nearly tricritical, th…
Misorientation Mapping for Visualization of Plastic Strain Via Electron Back-Scattered Diffraction
LN Brewer, MA Othon, LM Young,, TM Angeliu; Misorientation Mapping for Visualization of Plastic Strain Via Electron Back-Scattered Diffraction, Microscopy
THE STRUCTURE OF PRICEITE, A BASIC HYDRATED CALCIUM BORATE, BY AB INITIO POWDER-DIFFRACTION METHODS
The crystal structure of priceite, data and refined to Rwp = 0.042 and Rp = 0.030 using the Rietveld method. The monoclinic structure was refined in space group P21/c, a 11.623(1), b 6.976(1), c 12.350(1) Å, β 110.70(1)°, V936.72(1) Å3, Z = 4. The structure consists of infinite chains of pairs of borate rings that ext…
Synthesis of Binary Mg-Based Alloys by Mechanical Alloying
Abstract. The mechanical alloying behavior of magnesium with some transition and non-transition elements has been investigated. The structural changes during mechanical alloying were monitored by X-ray diffraction analysis. Mechanical alloying of Mg with transition metals V or Nb does not form alloys, and the solubili…
Anomalous magneto-crystalline anisotropy of MnCr2S4 single crystals
An electron-spin-resonance study of ferrimagnetic MnCr2S4 single crystals revealed a positive cubic magneto-crystalline anisotropy at temperatures below the Curie temperature TC (64.5 K). A large difference (∼2.5 kOe) was found between the resonance fields for the 〈001〉 and 〈111〉 axes at 4 K. The anisotropy constants…
Formation of cubic boron nitride films by r.f. magnetron sputtering
Abstract Boron nitride thin films have been deposited on silicon by tuned substrate r.f. magnetron sputtering from a sintered hexagonal BN target using a mixture of Ar (90%) and N 2 (10%) as sputtering gas at different substrate bias conditions. The deposited films have been characterized by Fourier transform infrared…
Dynamic segregation during ferrite oxidation revealed by XPS
Abstract Dynamic segregation phenomena were revealed by XPS during the oxidation of some ferrites (Fe 2.5 Ti 0.5 O 4 , Fe 2.5 Ni 0.5 O 4 , Fe 2 CrO 4 and FeCr 2 O 4 ). This kind of phenomenon induces, at a low temperature (below room temperature), drastic changes in the cationic composition of the most external layers…
Jahn-Teller effect in low-spin Ni3+ in the LaAlO3 ceramic
This paper reports on an EPR study of LaAl1−x NixO3 solid solutions with x≤0.12 made in the 4.2-to 300-K temperature range. In the X range, the broadening of the single EPR line with g eff=2.148 was observed at temperatures below ∼40 K. In the Q range, a slightly anisotropic EPR line with g ⊥ ′ =2.145±0.002 and g ‖ ′…
Unified hopping model for dc and ac conduction in chalcogenide glasses
A new analysis of electronic transport in chalcogenide glasses, based on bipolaron hopping in the extended pair approximation, is presented. It is assumed that the relaxation time of the carrier when hopping has a Meyer-Neldel type of temperature dependence instead of a simple activated form. In this way, the experime…
Hydrogen permeation through mild steel in temperature range 20–500°C measured by hydrogen collection method
Hydrogen permeation through steel plate maintained at various constant temperatures between 20 and 500°C was investigated using the hydrogen collection method. Fused salts were employed at elevated temperatures. Hydrogen entry was induced by step changes in cathodic charging current density. Emanating flux transients…
Electrical and thermoelectric properties of p-Ag2Te
Temperature dependences of the Hall coefficient R , electrical conductivity σ, and thermopower α 0 are investigated in the range of 4–300 K. The specific features observed in temperature dependences R ( T ), σ( T ), and α 0 ( T ) are interpreted in the context of a model with two types of charge carriers.
THE STRUCTURAL ROLE OF EXCESS Cu AND Pb IN GLADITE AND KRUPKAITE BASED ON NEW REFINEMENTS OF THEIR STRUCTURE
Crystal structures of stoichiometric gladite (empirical formula Cu1.32Pb1.37Bi6.65S12.03) and krupkaite (empirical formula Cu2.00Pb2.03Bi5.99S12.04) from Felbertal, Austria, were refined to R1 = 0.045 and 0.037, respectively, yielding improved positional parameters and interatomic distances. Structures of “oversubstit…