Search Options

Sort by:

Sort search results by

Publication Type:

Publication Type filter

Open access:

Publication Date:

Periodicals:

Periodicals filter

Search results

Online since: September 2013
Authors: S. Sisodia, A. Bandyopadhyay, S. Srikanth, P. Saravanan, D. Saravanan, K. Ravi
Fig.2 TMP to obtain UFG austenitic structure through reversion of deformation-induced martensite in metastable ASS Fig.2 illustrates the thermo-mechanical processing (TMP) used to obtain ultrafine grained (UFG) or nano-grained (NG) austenitic structure through controlled reversion of deformation-induced martensite in metastable ASS.
The formation of SIM saturates at around 39% cold reduction and at a saturating strain (εs) of about 0.39 with present chemistry and grain size of steel and for present set of rolling conditions (temperature, strain and strain rate).
Karimi, Potential application of nanocrystalline 301 austenitic stainless steel in lightweight vehicle structures, Mater.
Moallemi, The influence of reversion annealing behavior on the formation of nanograined structure in AISI 201L austenitic stainless steel through martensite treatment, Mater.
Rezaee, Effect of reversion annealing on the formation of nano/ultrafine grained structure in 201 austenitic stainless steel, Mater.
Online since: August 2018
Authors: Chun Chuan Gu, Xiao Ping Li, Hong Ying Liu
Introduction Catechol (1,2-dihydroxybenzen, CC) and hydroquinone (1,2-dihydroxybenzen, HQ) are two chemicals with almost the same structure and similar characteristics [1].
MWNTs (95% purity, diameter 8-15 nm, synthesized by chemical vapor deposition) were obtained from Chengdu Institute of Organic Chemistry of Academy of Sciences..
Lastly, SEM was used to characterize the morphologies and structure details of the optimum modified electrode.
Online since: October 2018
Authors: Rania Assem, A.S. Fouda, A.A. Ibrahim, M. Saadawy
They can be synthetic or natural and can be classified according to their chemical nature as organic and inorganic and according to mechanism of action as anodic, cathodic or mixed inhibitor, in general the inorganic inhibitors have cathodic or anodic actions, but the organic inhibitors have both actions cathodic and anodic and can protect the metal by a film adsorption.[2] Surfactants are considered as an important corrosion inhibitor with high ability for several metals in different media so they are used in different applications in many practical fields such as petroleum oil recovery, corrosion inhibition water and environmental pollutions, biotechnology, wide applications in different industries, medical science, analytical chemistry, pollution control, physics and engineering field as they are multidisciplinary in nature. [3,4] Anionic surfactants have large inhibiting effect of corrosion of steel in different media [5] such as (Diisononyl phthalate (A), N-oleyl-1, 3-propane –diamine
The names and molecular structures of the investigated surfactants: Name of Surfactant Chemical structure Molecular Formula Systematic name Diisononyl phthalate C26H42O4 (DINP) N-oleyl-1,3- propane-diamine C21H44N2 (3-Aminopropyl) ((9Z)-octadec-9-en-1-yl)amine Soduim lauryl sulphate NaC12H25SO4 Sodium dodecyl sulfate Different experimental methods were used to calculate the inhibition efficiency of these surfactants these are: 2.4.Chemical method (weight loss): Weight loss expiremnets carried out by Seven rectangular specimens bar of carbon steel of dimensions 2cm x2cmx0.2cm were abraded using successive grades of sand papers (80-1200) before each test, then degreased using acetone, rinsed by double distilled water, dried through two filter papers and precisely weighed, then were totally immersed in blank and different concentrations [50,100,150,200,250,300] ppm.
Online since: March 2014
Authors: Ewa Stodolak-Zych, Anna Łuszcz, Elżbieta Menaszek, Anna Ścisłowska-Czarencka
.: microstructure, tensile strength , physics-chemistry of surface.
Structure and functionalization of mesoporous bioceramics for bone tissue regeneration and local drug delivery.
Surface structure and phase separation mechanism of polysulfone membranes by atomic force microscopy, Journal of Membrane Science, 1 (1999) 159–166
Online since: September 2004
Authors: Y. Horie, Y. Hamate
But the models in this class are essentially phenomenological, and suffer well recognized short comings such as (1) non-physical model parameters that are difficult to determine, (2) inability to adequately describe microstructure effects such as grain size and specific area effects, and (3) the use of pressure dependent chemistry.
We conceived this structure, shown in Fig. 1, by abstracting the principal features of the three localization mechanisms: void collapse, shear banding, and frictional sliding.
The structure in plane geometry consists of the three elements: a space occupied by gas; a finite region of localized heating surrounded by the gas and the colder solid material with a lower or zero heating rate; and the interface between the gas and the hot spot.
Online since: October 2010
Authors: Claes Goran Granqvist, Sara V. Green, Shu Yi Li, N.R. Mlyuka, Gunnar A. Niklasson, Esteban Avendaño
Hence the modulation of the solar energy transmittance Tsol between a low-temperature and a high-temperature state is undesirably small; typically it is ~5 % for a VO2 film, but it can be as large as 10 to 15 % in a well-designed TiO2/VO2/TiO2/VO2/TiO2 multilayer structure [9].
There are also many ways to make nanorods (prolate spheroids with large aspect ratio) and nanosheets (oblate spheroids with high aspect ratio) by wet chemistry, gas phase synthesis, etc.
The standard electrochromic (EC) device has five superimposed layers on a transparent substrate—normally of glass or a polymer such as polyester foil—or positioned between two such substrates in a laminate structure [19,20].
Online since: June 2025
Authors: Andrzej Trytek, Paweł Żurawski
Activation washing involves a solution of manganese phosphate and sodium carbonate, which promotes the deposition of a finer and denser structure on the surface of the phosphated components.
When comparing the manganese phosphate layer on a new piston and a used one with approximately 100,000 kilometers of operation, the following conclusions can be drawn: • The thickness of the manganese phosphate layer on steel pistons ranges from 5 to 15 µm, • The formed layer is uniform, without gaps or sharp peaks, • The created grains form a uniformly distributed coating, • The grains are of comparable size, • Visible carbon deposits were found on the ring section of the used steel piston, • After 100,000 km, scuffing was observed in the piston pin hole of the steel piston, • The scuffing has a banded structure, • The formed bands consist of the exposed base material and remaining manganese phosphate, • Among the contaminants on the surface of the used piston, iron and carbon were detected, likely remnants from the surface wear, • The detected scuffing may be the cause of early engine failure.
Hassan, Effect of chemical composition of zinc phosphating solution on phosphate coating properties, Egyptian Journal of Chemistry 52 (2009) pp 699-709
Online since: August 2023
Authors: Ahmed Sultan Ali, Qahtan Suleman Noaman, Wissal Ali Hussein
Because shear flow breaks down the slurry structure, the down-curve has lower shear stress than the up-curve.
The degree of retardation depends on the amount of GGBFS additions, particle size, chemical composition, structure, fineness, temperature, and humidity [15, 16].
Taylor, Cement Chemistry, seconded., Thomas Telford, London, 1997 https://www.icevirtuallibrary.com/doi/pdf/10.1680/cc.25929.fm [6] P.
Online since: September 2005
Authors: X.-D. Zhou, W. Huebner, H.U. Anderson
INTRODUCTION The fluorite structure class of oxides is of importance in electrochemical processes.
The lattice of fluorite structure is basically face center cubic (space group Fm3m) with the general formula of MO2, in which M typically are Zr and Ce, as ZrO2 or CeO2.
A., The Chemistry of Imperfect Crystals, John Wiley and Sons: New York, 1962 19.
Online since: January 2014
Authors: D.V. Guzei, M.I. Pryazhnikov, Alexander S. Lobasov, Andrey V. Minakov
A previously developed algorithm based on the finite volume method for structured multiblock grids to simulate the flow and heat transfer was used [6-9].
The structured Cartesian grid with concentration to the channel walls was used in calculations.
Belkin, Modelling of the transport coefficients of nanofluids, Nanosystems: physics, chemistry, mathematics (2010) 156-177