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amorphization selen iopscience

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Scalable Mechanochemical Amorphization of Bimetallic …

Selective catalytic reduction of CO2 to methanol has tremendous importance in the chemical industry. It mitigates two critical issues in the modern society, the overwhelming climate change and the dependence on fossil fuels. The most used catalysts are currently based on mixed copper and zinc phases, where the high surface of active copper species is a critical factor for the …

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Amorphization activated ruthenium-tellurium nanorods …

Elctrochemical water splitting is of vital significance for energy conversion and storage. Here the authors show an electrocatalyst based on amorphous ruthenium-tellurium porous nanorods which ...

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In Situ Tribo-Electrochemical Evaluation of Wear of …

One of the most significant factors affecting manufacturing productivity is the wear of material. Wear is found in many engineering components, such as gears, bearing, pistons, and cutting tools, among others. 1,2 In the micro-electromechanical systems with moving parts, material transfer between the metallic and nonmetallic phases due to wear leads to dramatic …

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Lanthanides Regulated the Amorphization-Crystallization …

In this work, we used lanthanides to regulate IrO x amorphization–crystallization through inhibiting the crystallization of iridium atoms in the calcination process. The chosen route created abundant crystalline–amorphous ( c-a ) interfaces, which greatly enhanced the charge transfer kinetics and the stability of the materials.

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Effect and Progress of the Amorphization Process for

With a specific electrochemical capacity of 3579 mAh g Si −1, silicon is a promising candidate for next generation Li-ion batteries, as it exceeds the capacity of commonly used graphite by a factor of 10. 1,2 However, large volume changes upon (de-)alloying up to ∼300 % lead to mechanical stress in the active material resulting in particle pulverization. 1,3 This …

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Shock-Induced Localized Amorphization in Boron Carbide

Abstract. High-resolution electron microscope observations of shock-loaded boron carbide have revealed the formation of nanoscale intragranular amorphous bands that occur parallel to specific crystallographic planes and contiguously with apparent cleaved fracture surfaces. This damage mechanism explains the measured, but not previously ...

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Electrochemical solid-state amorphization in the …

This large negative Δ Hmix provides the thermodynamic basis to enable chemical intermixing and amorphization through the diffusive solid-state reactions between Si (or Sn) and electrochemically generated Li [6]. In sharp contrast, however, Cu-Li is a well-known immiscible system with their Δ Hmix being near zero (0.56 kJ/mol by Calphad ...

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Pressure and shear-induced amorphization of silicon

Shear-induced lattice defects (stacking faults and twins) on crystallographic slip planes play a crucial role in the onset of amorphization. Molecular dynamics show that silicon behaves elastically until ∼10 GPa and, at slightly higher pressures, partial dislocations and stacking faults are emitted from the surface.

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Amorphization in extreme deformation of the …

This amorphous island appears to form at the intersection of hcp and twin packets on intersecting crystallographic planes. Fig. 2 Deformation microstructure of the swaged CrMnFeCoNi HEA subjected to quasi-static compression. ( A) TEM bright-field image shows profuse planar deformation features.

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Reversible Al Metal Anodes Enabled by Amorphization for …

Aqueous aluminum metal batteries (AMBs) are regarded as one of the most sustainable energy storage systems among post-lithium-ion candidates, which is attributable to their highest theoretical volumetric capacity, inherent safe operation, and low cost. Yet, the development of aqueous AMBs is plagued by the incapable aluminum plating in an aqueous …

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Fe-doping induced localized amorphization in ultrathin α …

In this work, we successfully realize identified amorphization of ultrathin two-dimensional α-Ni(OH) 2 nanomeshes through Fe doping, by which the amorphization rates can be controlled over 10–78% in area ratios with the desired amount of Fe doping. The localized amorphization dramatically accelerates the reaction kinetics and thus enhances ...

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Amorphization by mechanical deformation - ScienceDirect

Amorphization by mechanical attrition was observed in the Nb 3 Sn alloy when ball milling Nb + Sn, Nb + NbSn 2 or Nb 3 Sn crystalline powder mixtures [51]. In starting powders of Nb + Sn and Nb + NbSn 2, milling first formed the A15 crystalline structure Nb 3 Sn phase which then transformed to the amorphous structure.

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amorphization selenium iopscience

amorphization selenium iopscience; Permanent bending and alignment of ZnO nanowires. Official Full-Text Paper (PDF): Permanent bending and alignment of ZnO nanowires. Read more. difference between ball mill and high pressure torsion. Severe plastic deformation. Looking for Fese ? PeekYou's people search has 24 people named Fese and you can find ...

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Interface amorphization improving the mechanical

Recently, metallic nanolaminates have been intensively studied because of their excellent mechanical properties [1, 2], electrical properties [], magnetic properties [] and optical properties [].Modulation ratio (η) and modulation periods (λ) are defined as thickness ratio and total thickness of two adjacent monolayers, respectively.The interface structure greatly affects …

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Mechanochemically driven amorphization of …

The amorphization is studied in mechanically activated β-As4S4 using high-energy ball milling in a dry mode with 100–600 min−1 rotational speeds, employing complementary methods of X-ray powder diffraction (XRPD) related to the first sharp diffraction peak, positron annihilation lifetime (PAL) spectroscopy, and ab initio quantum-chemical simulation within …

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Pressure induced transformation and subsequent …

The Nb 2 O 5 (99.9985% purity) powder used in the experiment was obtained from Alfa Aesar. High-pressure experiments were generated by using a symmetric diamond-anvil cell (DAC) with a pair of diamonds of culet size of 400 µm.A stainless-steel gasket with a 130 µm hole was used as the sample chamber.The sample and a small ruby ball were loaded in the …

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Ion-beam-induced amorphization and …

Ion-beam-induced amorphization in Si has attracted significant interest since the beginning of the use of ion implantation for the fabrication of Si devices. A number of theoretical calculations and experiments were designed …

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amorphization selenium iopscience

amorphization selenium iopscience. ... This is an indication that the amorphization process is not due to a soft long-wavelength acoustic phonon Room-temperature Raman spectra from samples heated to close to the amorphization temperature show that amorphization occurs more rapidly on the 110 than on the 001 crystallographic face...

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IOPscience

The homepage of IOPscience, home to more than 130 years of leading scientific research journal content

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Amorphization and nanocrystallization of silicon under …

Amorphization starts alongside these SFs and also at their intersection within ps of plasticity initiation. (4) Following the Patel and Cohen formalism, the energetics of shock-induced amorphization was analyzed. At a temperature below melting temperature, the c-a transformation has to overcome a high energy barrier, making it impossible to ...

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Amorphization in extreme deformation of the …

By subjecting the equiatomic CrMnFeCoNi HEA to severe plastic deformation through swaging followed by either quasi-static compression or dynamic deformation in shear, we observe a dense structure comprising stacking faults, twins, transformation from the face-centered cubic to the hexagonal close-packed structure, and, of particular note ...

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Tuning the Adsorption Selectivity of ZIF-8 by Amorphization

Amorphous metal–organic frameworks (a m MOFs) with a partially collapsed structure are a new category of porous hybrid materials.Here, solid-state amorphization of ZIF-8 was achieved by mechanical compression at 0.75 GPa. The compression-induced amorphous ZIF-8 (a m ZIF-8) had a collapsed structure, but retained partial porosity.Benefiting from the …

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FUSION SELECT ELECTRICAL Protochips

FUSION SELECT ELECTRICAL BIBLIOGRAPHY JOURNAL ARTICLES SF-00003 Fusion Select - Electrical v4.4 - JULY 2022 Title URL Citation Protochips Creating the Connected Lab

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Amorphization mechanism of SrIrO3 electrocatalyst: How …

In this work, we provide atomic-level insight into the crystalline-to-amorphous transformation and describe a mechanism that holistically connects the lattice oxygen activation, metal dissolution, and amorphization in SrIrO 3.We focus on SrIrO 3, the state-of-the-art OER electrocatalyst in acid (), to understand the origin of its high activity and track its interfacial …

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Amorphization processes in self‐ion‐implanted Si: Dose …

The structural transformation in self‐ion‐implanted Si has been investigated using Raman spectroscopy and Rutherford backscattering spectrometry. The crystal Si Raman peak at 520 cm −1 decreased, broadened, and shifted toward lower wave numbers as the 100 keV Si + dose was increased from 0.8 to 8.5×10 14 cm −2.These peak shifts can be attributed to …

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Dynamic weakening and amorphization in serpentinite …

We performed stick-slip experiments in saw-cut samples of natural antigorite under triaxial stress conditions (i.e., for principal stresses such that σ 2 = σ 3 < σ 1) at confining pressures of σ 3 = 30 and 95 MPa (resulting in fault-normal stresses of up to >200 MPa, i.e., much higher than allowed in a typical rotary shear apparatus). Individual stick-slip events are …

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Amorphization of a crystalline active pharmaceutical …

Amorphization is nowadays a method that is frequently applied in the pharmaceutical industry. The primary aim of this study is to achieve the amorphization of clopidogrel hydrogen sulphate as an active pharmaceutical ingredient (API) with various solvents and to choose the most suitable one. A secondary aim was to determine the glass-transition temperature (T g) of …

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Electrochemical Solid-state Amorphization in …

The critical size of Cu nanoparticles was measured to be ∼6 nm, above which Cu cannot alloy with Li. This cover image illustrates the occurrence of electrochemically driven solid-state amorphization of Cu-Li mediated by the …

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Amorphization of cobalt monoxide nanocrystals and …

Amorphous nanomaterials have attracted attention due to their excellent performances, highly comparable to their crystalline counterparts. Sensor materials with amorphous phases a

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Understanding resistance to amorphization by radiation …

Hence one can generally state that the efficiency of damage recovery and hence resistance to amorphization of a complex material is defined by the competition between the long-range and short-range forces, ... IOPscience Google Scholar. Taubes G 1994 Science 263 629. Crossref PubMed Google Scholar. Ringwood A E et al 1979 Nature 278 219.

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