Results 21 to 30 of about 45,814 (198)

Structure–Phase Transformations in the Modified Surface of Al-20%Si Alloy Subjected to Two-Stage Treatment

open access: yesLubricants, 2022
The paper describes the two-stage modification of the surface layer of hypereutectic Al-20%Si alloy that combines electroexplosive alloying by an Al-Y2O system with subsequent irradiation by pulsed electron beam.
Yulia Shliarova   +4 more
doaj   +1 more source

The Possibilities of Improving the Fatigue Durability of the Ship Propeller Shaft by Burnishing Process

open access: yesMachines, 2020
Heavily loaded structural elements operating in a corrosive environment are usually quickly destroyed. An example of such an element is a ship propeller operating in a seawater environment.
Stefan Dzionk   +2 more
doaj   +1 more source

Increased Wear Coatings due Intrastructural Self-Correction

open access: yesЖурнал інженерних наук, 2019
A mechanism for blocking and subsequent annihilation of endogenous microcracks due to their intrastructural self-correction has been proposed. It has been established that during tribomechanical processes of friction interaction under conditions of ...
Babak V. P.   +2 more
doaj   +1 more source

Micro-Scale Properties of Different Bora Types

open access: yesAtmosphere, 2018
In this paper we use 20 Hz wind measurements on three levels (2, 5, and 10 m) to investigate the differences in micro-scale properties of different bora types, i.e., deep and shallow bora with further subdivision to cyclonic and anticyclonic bora cases ...
Vinko Šoljan   +8 more
doaj   +1 more source

Molecular distribution and compound-specific stable carbon isotopic composition of dicarboxylic acids, oxocarboxylic acids and α-dicarbonyls in PM2.5 from Beijing, China [PDF]

open access: yesAtmospheric Chemistry and Physics, 2018
This study investigates the seasonal variation, molecular distribution and stable carbon isotopic composition of diacids, oxocarboxylic acids and α-dicarbonyls to better understand the sources and formation processes of fine aerosols (PM2.5) in ...
W. Zhao   +24 more
doaj   +1 more source

Determination the residual stresses in the surface layer of gas turbine engine parts by small hole drilling [PDF]

open access: yesМеталознавство та обробка металів, 2020
A methodology for measuring residual stresses based on drilling small diameter holes with subsequent fixation of deformation using a strain gauge as applied to thin-walled complex parts of gas turbine engines has been presented. It is known that the bulk
E.V. Vyshnepolskyi   +3 more
doaj   +1 more source

Effectiveness of Protective Action of Coatings from Moisture Sorption into Surface Layer of Sand Moulds

open access: yesArchives of Metallurgy and Materials, 2016
The results of investigations of the sorption process of surface layers of sand moulds covered by zirconium and zirconium - graphite alcohol coatings are presented in the paper. Investigations comprised two kinds of sand grains (silica sand and reclaimed
Kaźnica N., Zych J.
doaj   +1 more source

Characterization of Turbulence in the Neutral and Stable Surface Layer at Jang Bogo Station, Antarctica

open access: yesAtmosphere, 2021
The availability of 5-year time series of velocity and temperature data from two sonic anemometers installed at Jang Bogo Station, Antarctica, allowed a systematic investigation of the turbulence features in a stable layer affected by submeso motions and
Mauro Mazzola   +3 more
doaj   +1 more source

Cell Structure Changes in the Hyperthermophilic Crenarchaeon Sulfolobus islandicus Lacking the S-Layer

open access: yesmBio, 2019
Rediscovery of the ancient evolutionary relationship between archaea and eukaryotes has revitalized interest in archaeal cell biology. Key to the understanding of archaeal cells is the surface layer (S-layer), which is commonly found in Archaea but whose
Changyi Zhang   +5 more
doaj   +1 more source

Surface thickness water and ethanol

open access: yesФизико-химические аспекты изучения кластеров, наноструктур и наноматериалов, 2023
A theoretical model is proposed that allows one to determine the thickness of the surface layer of liquid R(I). For water and ethanol it turned out to be 1,1 nm. As a result, ethanol is unlimitedly soluble in water. Methyl acetate, benzene and toluene (R(
V.M. Yurov, K.N. Zhangozin
doaj   +1 more source

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