Results 21 to 30 of about 595,419 (195)

Thermomechanical and Physical Properties of Plaster Concrete Reinforced with Natural Fibers [PDF]

open access: yesMechanics of Advanced Composite Structures, 2023
The main objective of this experimental study is to valorize local materials in order to use them as composite Materials (CM) for construction. In this study case, the CM is composed of fibers of Luffa sponge embedded in plaster.
Khaled Kharrati   +3 more
doaj   +1 more source

Advanced Porous Particle Model in Biomass Pyrolysis

open access: yesChemical Engineering Transactions, 2022
In order to decrease anthropogenic CO2 emissions and to become independent from fossil resources, one alternative for energy generation and production of platform-chemicals is the usage of biomass.
Andrea Dernbecher, Alba Dieguez-Alonso
doaj   +1 more source

Effect of Vacuum Heat Treatment on the Chemical Composition of Larch Wood

open access: yesBioResources, 2016
The effects of vacuum heat treatment were studied relative to the chemical composition of larch wood. The samples were heat-treated in vacuum at 160 °C, 200 °C, and 240 °C for 4 h, and the chemical changes were investigated by wet chemical analysis ...
Zhe Wang   +5 more
doaj   +1 more source

Influence of Conditions for Production and Thermo-Chemical Treatment of Al2O3 Coatings on Wettability and Energy State of Their Surface [PDF]

open access: yes, 2020
This article presents the influence of the anodizing parameters and thermo-chemical treatment of Al2O3 coatings made on aluminum alloy EN AW-5251 on the surface free energy.
Władysław Skoneczny   +5 more
core   +1 more source

Identification of Intermetallic Phases Limiting the Growth of Austenite Grains in the Low-Pressure Carburizing Process

open access: yesCrystals, 2023
This article presents the results of a study to identify intermetallic phases whose role is to limit austenite grain growth in the low-pressure carburizing process.
Konrad Dybowski, Leszek Klimek
doaj   +1 more source

Steel Cruciform Sample with Nitrided Arms Achieves Higher Plastic Strain in the Gauge Region

open access: yesApplied Sciences, 2022
This paper describes a novel solution to increase plastic strain in the gauge region of a cruciform sample during a forming limit test. A nitriding procedure was used to increase the strength of the arms of the specimen and at the same time enabled ...
Grzegorz Mitukiewicz
doaj   +1 more source

Disintegration of waste activated sludge via Thermo-Chemical Pre-Treatment.

open access: yes, 2018
The rate limiting step in the digestion of the waste active sludge is hydrolysis the stage. Thermal pre-treatment and chemical sludge disintegration methods can be used to shorten the biochemical hydrolysis process and increase the digester capacity ...
Şahinkaya, Serkan
core   +2 more sources

Acetylene Flow Rate as a Crucial Parameter of Vacuum Carburizing Process of Modern Tool Steels

open access: yesArchives of Metallurgy and Materials, 2016
Carburizing is one of the most popular and wide used thermo-chemical treatment methods of surface modification of tool steels. It is a process based on carbon diffusive enrichment of the surface material and is applied for elements that are supposed to ...
Rokicki P., Dychton K.
doaj   +1 more source

To estimation of contact-fatigue durability of thermo-chemically strengthened gears

open access: yesAdvanced Engineering Research, 2017
Introduction. The specification of the strength characteristics of the diffusion layer of carburized (C) and nitro-carburized (NC) involute gears is described.
Nikolay P. Onishkov, Victor I. Korotkin
doaj   +1 more source

Surface Roughness of Glass Ionomer Cements after Application of Different Polishing Techniques

open access: yesActa Stomatologica Croatica, 2018
Glass Ionomer Cements (GIC) have been widely used in clinical practice since they have a wide range of positive characteristics: chemical bonding to the tooth surface, fluoride release, a heat-expansion coefficient similar to the tooth, do not require an
Ante Miličević   +3 more
doaj   +1 more source

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