Results 21 to 30 of about 867,433 (306)

Characterization of metals in four dimensions

open access: yesMaterials Research Letters, 2020
The ability to watch the three-dimensional (3D) evolution of structural materials is a breakthrough in non-destructive characterization. In particular, X-ray tomographic imaging techniques have found success in revealing the underlying mechanisms of ...
Ashwin J. Shahani   +3 more
doaj   +1 more source

A Study on the Hall–Petch Relationship and Grain Growth Kinetics in FCC-Structured High/Medium Entropy Alloys

open access: yesEntropy, 2019
The recrystallization behavior, grain growth kinetics, and corresponding hardness variation of homogenized and 80% cold-rolled FeCoNiCrPd, FeCoNiCrMn, and their quaternary/ternary FCC-structured high/medium entropy alloys (H/MEAs) annealed under ...
Yung-Chien Huang   +3 more
doaj   +1 more source

Shearing Characteristics of Cu-Cu Joints Fabricated by Two-Step Process Using Highly <111>-Oriented Nanotwinned Cu

open access: yesMetals, 2021
Cu-Cu bonding has the potential to break through the extreme boundary of scaling down chips’ I/Os into the sub-micrometer scale. In this study, we investigated the effect of 2-step bonding on the shear strength and electrical resistance of Cu-Cu ...
Jia-Juen Ong   +4 more
doaj   +1 more source

Grain growth and yield potential of wheat genotypes under late sown heat stressed condition

open access: yesFundamental and Applied Agriculture, 2019
Four wheat genotypes (BARI gom 25, BARI gom 26, BAW 1135 and Pavon 76) were sown at different dates (29 November, 5, 16, 23 and 30 December respectively) to evaluate genotypic differences imposed by late seeded heat stress condition.
Joyanti Ray, Jalal Uddin Ahmed
doaj   +1 more source

Ultrasonic Welding of Nickel with Coarse and Ultrafine Grained Structures

open access: yesMetals, 2021
Solid state joints of samples of coarse-grained (CG) and ultrafine-grained (UFG) nickel have been obtained for the first time using spot ultrasonic welding (USW).
Elvina R. Shayakhmetova   +2 more
doaj   +1 more source

Structural Stability and Performance of Noble Metal-Free SnO2-Based Gas Sensors

open access: yesBiosensors, 2012
The structural stability of pure SnO2 nanoparticles and highly sensitive SnO2-SiO2 nanocomposites (0–15 SiO2 wt%) has been investigated for conditions relevant to their utilization as chemoresistive gas sensors. Thermal stabilization by SiO2 co-synthesis
Antonio Tricoli
doaj   +1 more source

Effect of High Pressure Spark Plasma Sintering on the Densification of a Nb-Doped TiO2 Nanopowder

open access: yesCeramics, 2020
Sintering under pressure by means of the spark plasma sintering (SPS) technique is a common route to reduce the sintering temperature and to achieve ceramics with a fine-grained microstructure.
Alexandre Verchère   +8 more
doaj   +1 more source

The dust mass in z > 6 normal star forming galaxies [PDF]

open access: yes, 2015
We interpret recent ALMA observations of z > 6 normal star forming galaxies by means of a semi-numerical method, which couples the output of a cosmological hydrodynamical simulation with a chemical evolution model which accounts for the contribution to ...
Ciardi, Benedetta   +7 more
core   +2 more sources

Grain boundary saturation and grain growth

open access: yesScripta Materialia, 2004
Abstract In nanoscale alloys with strong segregation tendency, the grain size at metastable thermodynamic equilibrium is determined by the grain boundary energy, the enthalpy change of grain boundary segregation, and the solute excess of an equivalent grain boundary monolayer at saturation.
Liu, F., Kirchheim, Reiner
openaire   +2 more sources

Probing the Deformation Mechanisms of Nanocrystalline Silver by In-Situ Tension and Synchrotron X-ray Diffraction

open access: yesMetals, 2020
The mechanisms responsible for the deformation of nanocrystalline materials are not well understood although many mechanisms have been proposed. This article studies the room-temperature stress-strain relations of bulk nanocrystalline silver deformed in ...
Baoru Sun, Tongde Shen
doaj   +1 more source

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