Results 51 to 60 of about 656,556 (303)

Biocalcarenites as construction materials in Santa Marina de Aguas Santas Church at Cordoba, Spain

open access: yesMateriales de Construccion, 2009
This study consisted in characterizing the materials used to build Santa Marina de Aguas Santas Church at Cordoba and locating the original quarries.
J. Barrios Neira   +4 more
doaj   +1 more source

Effect of Metallographic Sample Preparation Processes on Retained Austenite Volume Fraction in Quenched AISI 52100 Steel

open access: yesGazi Üniversitesi Fen Bilimleri Dergisi, 2020
Sample preparation is one of the main steps in metallographic examinations and the sample preparation processes give rise to changes in the determination of volume fraction of any phases can cause failure at the interpretation of a study.
Burak NALÇACI   +2 more
doaj   +1 more source

Non-destructive characterisation of fine grained samples: assessment of insitu micro-XRD of primitive meteorite matrix [PDF]

open access: yes, 2014
No abstract ...
Franchi, I.A.   +4 more
core  

Characterization of Nitinol Produced by Laser Powder Bed Fusion for Mechanical Metamaterial Applications

open access: yesAdvanced Engineering Materials, EarlyView.
Stabilization of L‐PBF Ni50.7Ti49.3 under low‐cycle loading was investigated. Recoverable strain after cycling was dependent on the amount of applied load. Recovery ratio was 53.4% and 35.1% at intermediate and high load, respectively. The maximum total strain reached 10.3% at a high load of 1200 MPa.
Ondřej Červinek   +5 more
wiley   +1 more source

Evolution of the hydration in cements with additions

open access: yesMateriales de Construccion, 2002
In this paper, the hydration mechanism of portland cement pastes with limestone, quartz and natural pozzolan (80/20 weight) was analized. The techniques used were nonevaporable water content, pozzolanic activity and X-ray diffraction.
V. L. Bonavetti   +2 more
doaj   +1 more source

Effect of Different Chemical Treatments on Surface Morphology, Thermal and Tensile Strength of Bauhinia Vahlii (BV) Stem Fibers

open access: yesJournal of Natural Fibers, 2022
Appropriate surface modifications are required to enhance the compatibility of natural fibers with polymer matrix to develop eco-friendly composites. One of such novel plant fibers is Bauhinia vahlii (BV) stem fiber.
Umakanta Patel   +4 more
doaj   +1 more source

Phase composition and transformations in magnetron-sputtered (Al,V)2O3 coatings

open access: yes, 2019
Coatings of (Al1-xVx)2O3, with x ranging from 0 to 1, were deposited by pulsed DC reactive sputter deposition on Si(100) at a temperature of 550 {\deg}C. XRD showed three different crystal structures depending on V-metal fraction in the coating: {\alpha}-
Ahlgren, M.   +9 more
core   +1 more source

Effect of TiO2 addition on structure, solubility and crystallisation of phosphate invert glasses for biomedical applications [PDF]

open access: yes, 2010
NOTICE: this is the author’s version of a work that was accepted for publication in JOURNAL OF NON-CRYSTALLINE SOLIDS. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality ...
Abrahams   +28 more
core   +1 more source

Effect of Oxygen Content on Surface and Subsurface Integrity During Turning of Ti–6Al–4V

open access: yesAdvanced Engineering Materials, EarlyView.
This study examines how oxygen content in the ambient atmosphere affects the surface and subsurface properties of Ti–6Al–4V during turning. Results show that oxygen does not influence surface roughness. However, machining in an extremely high vacuum‐adequate atmosphere increases surface hardness by up to 7.8% and induces compressive residual stresses ...
Benjamin Bergmann   +3 more
wiley   +1 more source

Effect of Indium Doping Zinc Sulfide Nanostructures on the Physical and Sensing Properties via Chemical Spray Pyrolysis

open access: yesProceedings of the International Conference on Applied Innovations in IT
Indium-doped ZnS samples with doping levels of 0%, 1%, and 3% were fabricated using the chemical spray pyrolysis (CSP) method. XRD patterns confirmed the presence of a cubic zinc blend structure of both pure and Indium-doped ZnS samples.
Tahseen H. Mubarak   +7 more
doaj   +1 more source

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