Erratum to “Determination of ɑ/β phase boundaries and mechanical characterization of Mg-Sc binary alloys” [Mater. Sci. Eng. A 670 (2016) 335–341]

2016 ◽  
Vol 674 ◽  
pp. 713
Author(s):  
Yukiko Ogawa ◽  
Daisuke Ando ◽  
Yuji Sutou ◽  
Kyosuke Yoshimi ◽  
Junichi Koike
Keyword(s):  
Mechanical Characterization ◽  
Binary Alloys ◽  
Phase Boundaries ◽  
Β Phase

Determination of α/β phase boundaries and mechanical characterization of Mg-Sc binary alloys

2016 ◽  
Vol 670 ◽  
pp. 335-341 ◽  
Author(s):  
Yukiko Ogawa ◽  
Daisuke Ando ◽  
Yuji Sutou ◽  
Kyosuke Yoshimi ◽  
Junichi Koike
Keyword(s):  
Mechanical Characterization ◽  
Binary Alloys ◽  
Phase Boundaries ◽  
Β Phase

Mechanical, Electrical and Thermal Characterization of Commercially Available LTCC Dielectric Tapes

2013 ◽  
Vol 543 ◽  
pp. 212-215
Author(s):  
Goran Radosavljević ◽  
Nelu Blaž ◽  
Andrea Marić ◽  
W. Smetana ◽  
Ljiljana Živanov
Keyword(s):  
Mechanical Properties ◽  
Surface Roughness ◽  
Electrical Properties ◽  
Material Characterization ◽  
Mechanical Characterization ◽  
Thermal Characterization ◽  
Material Parameters ◽  
Mechanical And Electrical Properties

Presented paper deals with mechanical and electrical properties of several commercially available LTCC (Low Temperature Co-fired Technology) tapes, as well as their thermal characterization. Three commercially available dielectric tape materials provided by Heraeus (CT700, CT707 and CT800) are investigated. The samples for determination of significant material parameters are prepared using the standard LTCC fabrication process. Results of the material characterization (chemical analysis, surface roughness electrical and mechanical properties) are presented. In addition thermo-electrical and-mechanical characterization of investigated tapes analysis is performed.

scholarly journals Waste Slag from Heating Plants as a Partial Replacement for Cement in Mortar and Concrete Production. Part I—Physical–Chemical and Physical–Mechanical Characterization of Slag

Minerals ◽  
2020 ◽  
Vol 10 (11) ◽  
pp. 992
Author(s):  
Andrijana Nedeljković ◽  
Marija Stojmenović ◽  
Jelena Gulicovski ◽  
Nenad Ristić ◽  
Sonja Milićević ◽  
...  
Keyword(s):  
Silica Fume ◽  
Mechanical Characterization ◽  
Setting Time ◽  
Partial Replacement ◽  
Minimal Amount ◽  
Cement Replacement ◽  
Physical Chemical ◽  
Concrete Production

Numerous factors influence the complexity of environmental and waste management problems, and the most significant goal is the reuse of materials that have completed their “life cycle” and the reduction in the use of new resources. In order to reduce impact of waste slag on the environment, in the present study, waste slag, generated in heating plants after lignite combustion, was characterized in detail and tested for application as a replacement for cement in mortar or concrete production. For physical–chemical characterization of slag, different experimental and instrumental techniques were used such as chemical composition and determination of the content of heavy metals, investigation of morphological and textural properties, thermal analysis, X-ray, and infrared spectroscopy. Physical–mechanical characterization of slag was also performed and included determination of activity index, water requirement, setting time and soundness. A leaching test was also performed. Presented results show that waste slag may be used in mortar and concrete production as a partial cement replacement, but after additional combustion at 650 °C and partial replacement of slag with silica fume in the minimal amount of 12%. The maximal obtained cement replacement was 20% (17.8% slag and 2.2% of silica fume).

scholarly journals A New Approach for the AFM-Based Mechanical Characterization of Biological Samples

Scanning ◽  
2020 ◽  
Vol 2020 ◽  
pp. 1-10
Author(s):  
S. V. Kontomaris ◽  
A. Malamou ◽  
A. Stylianou
Keyword(s):  
Mechanical Properties ◽  
Physical Quantity ◽  
Biological Samples ◽  
Mechanical Characterization ◽  
Elastic Half Space ◽  
Hertzian Contact ◽  
Elastic Response ◽  
Work Done

The AFM nanoindentation technique is a powerful tool for the mechanical characterization of biological samples at the nanoscale. The data analysis of the experimentally obtained results is usually performed using the Hertzian contact mechanics. However, the aforementioned theory can be applied only in cases that the sample is homogeneous and isotropic and presents a linear elastic response. However, biological samples often present depth-dependent mechanical properties, and the Hertzian analysis cannot be used. Thus, in this paper, a different approach is presented, based on a new physical quantity used for the determination of the mechanical properties at the nanoscale. The aforementioned physical quantity is the work done by the indenter per unit volume. The advantages of the presented analysis are significant since the abovementioned magnitude can be used to examine if a sample can be approximated to an elastic half-space. If this approximation is valid, then the new proposed method enables the accurate calculation of Young’s modulus. Additionally, it can be used to explore the mechanical properties of samples that are characterized by a depth-dependent mechanical behavior. In conclusion, the proposed analysis presents an accurate yet simple technique for the determination of the mechanical properties of biological samples at the nanoscale that can be also used beyond the Hertzian limit.

scholarly journals Mechanical Characterization of Multiwalled Carbon Nanotubes: Numerical Simulation Study

Materials ◽  
2020 ◽  
Vol 13 (19) ◽  
pp. 4283 ◽  
Author(s):  
Nataliya A. Sakharova ◽  
André F. G. Pereira ◽  
Jorge M. Antunes ◽  
José V. Fernandes
Keyword(s):  
Carbon Nanotubes ◽  
Multiwalled Carbon Nanotubes ◽  
Mechanical Characterization ◽  
Element Model ◽  
Van Der Waals Interactions ◽  
Multiwalled Carbon ◽  
Shear Moduli ◽  
Simplified Finite Element Model

The elastic properties of armchair and zigzag multiwalled carbon nanotubes were investigated under tensile, bending, and torsion loading conditions. A simplified finite element model of the multiwalled carbon nanotubes, without taking into account the van der Waals interactions between layers, was used to assess their tensile, bending, and torsional rigidities and, subsequently, Young’s and shear moduli. Relationships between the tensile rigidity and the squares of the diameters of the outer and inner layers in multiwalled carbon nanotubes, and between the bending and torsional rigidities with the fourth powers of the diameters of the outer and inner layers, were established. These relationships result in two consistent methods, one for assessment to the Young’s modulus of armchair and zigzag multiwalled carbon nanotubes, based on tensile and bending rigidities, and the other to evaluate shear modulus using tensile, bending, and torsional rigidities. This study provides a benchmark regarding the determination of the mechanical properties of nonchiral multiwalled carbon nanotubes by nanoscale continuum modeling approach.

Processing and Characterization of β-Ti Alloys by Means of Powder Metallurgy Processing and Blender Elemental

2012 ◽  
Vol 727-728 ◽  
pp. 61-66 ◽  
Author(s):  
F. Devesa ◽  
S. Rial ◽  
Vicente Amigó
Keyword(s):  
Corrosion Resistance ◽  
Powder Metallurgy ◽  
Mechanical Characterization ◽  
Processing Technique ◽  
High Corrosion Resistance ◽  
Β Phase ◽  
Ti Alloys ◽  
Low Elastic Modulus ◽  
Singular Characteristics

Titanium is an increasingly used material on industry. Based on Ti and titanium alloys characteristics, one of the most favorable processing methods is the powder metallurgy. Attending to microstructure, alloys showing β phase have singular characteristics of low elastic modulus, good specific properties and high corrosion resistance, which make β-Ti alloys very appropriated for specific uses covering a width list of fields including aeronautics or biomaterials. At this work, it has been obtained and characterized different β-Ti alloys. The processing technique has been optimized by means of an initial blender elemental followed by basic powder metallurgy. Microstructural and mechanical characterization of the studied alloys has been achieved. Results show that these kinds of alloys can be produced by this technique and the obtained properties are really interesting for a wide variety of applications.

Mechanical Characterization of Apricena Marble by Ultrasonic Immersion Tests

2014 ◽  
Vol 628 ◽  
pp. 109-116 ◽  
Author(s):  
Anna Castellano ◽  
Pilade Foti ◽  
Aguinaldo Fraddosio ◽  
Salvatore Marzano ◽  
Mario Daniele Piccioni
Keyword(s):  
Wave Propagation ◽  
Elastic Moduli ◽  
Mechanical Characterization ◽  
Experimental Results ◽  
Elastic Response ◽  
Ultrasonic Velocities ◽  
Elastic Materials

We characterize the elastic response of Apricena marble by using advanced ultrasonic nondestructive techniques. An innovative experimental device for ultrasonic immersion tests is employed for the determination of ultrasonic velocities of waves travelling into the sample for any angle of propagation. The interpretation of the experimental results within the theoretical framework of wave propagation in elastic materials allows for both the classification of the anisotropy and the determination of the elastic moduli.

scholarly journals The Example of the Quartzite from the "Upper Quartzite Formation" from Trás-os-Montes and Alto Douro (Northern Portugal); Its Characterization to Use as Natural Stone

2013 ◽  
Vol 548 ◽  
pp. 212-219 ◽  
Author(s):  
Sílvia Aires ◽  
Fernando Noronha ◽  
Cristina Carvalho ◽  
António Casal Moura ◽  
João Farinha Ramos
Keyword(s):  
Mechanical Characterization ◽  
White Mica ◽  
Natural Stone ◽  
Northern Portugal ◽  
Natural Stones ◽  
Opaque Minerals

Metaquartzite from Serra da Garraia and Zebras were studied. These rocks belong to the "Upper Quartzite Formation" of the “Parautochthonous Complex”. They are light grey and present, sometimes, a brownish patina. The quarries range from 2 to 10m high and 25 to 40m long. This study consists on the petrographic, chemical and physical-mechanical characterization of these rocks, aiming the determination of their potential as natural stone. The petrographic studies revealed that the rocks are formed by quartz and white mica and accessory opaque minerals (titanomagnetite, magnetite, and hematite) and zircon. The petrographic studies and SiO2 and Al2O3 values revealed a different evolution for Garraia and Zebras in terms of textural maturity and mineralogical differentiation. The studies allowed the distinction between quartzites and quartz phyllites. The physical-mechanical analyses attest that all the studied rocks can be used as natural stones.

Microstructural and Microchemical Characterization of Nickel Sulfide Inclusions in Plate Glass

1991 ◽  
Vol 49 ◽  
pp. 962-963
Author(s):  
J. Cooper ◽  
O. Popoola ◽  
W. M. Kriven
Keyword(s):  
Thermal Expansion ◽  
Phase Transformation ◽  
Glass Matrix ◽  
Nickel Sulfide ◽  
Plate Glass ◽  
Thermal Expansion Mismatch ◽  
Volume Increase ◽  
Β Phase ◽  
Microchemical Characterization

Nickel sulfide inclusions have been implicated in the spontaneous fracture of large windows of tempered plate glass. Two alternative explanations for the fracture-initiating behaviour of these inclusions have been proposed: (1) the volume increase which accompanies the α to β phase transformation in stoichiometric NiS, and (2) the thermal expansion mismatch between the nickel sulfide phases and the glass matrix. The microstructure and microchemistry of the small inclusions (80 to 250 μm spheres), needed to determine the cause of fracture, have not been well characterized hitherto. The aim of this communication is to report a detailed TEM and EDS study of the inclusions.

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