Search results

Beyond this, it was not possible to continue using the sin2y method, due to the strong texture and high grain size of the material.
The residual stresses measured at point H2, figures 3c and 3d, showed similar evolution, although the number of measurements was below those of point H1.

If a nano silicon particles dispersed porous silica itself with the structure and the space between the nano silicon can provide a large number of channels for lithium ion, increasing the insert position of lithium ions.
The use of high energy mechanical milling (HEMM) [5] technology allows silicon, porous silica brought into close contact with graphite, and generated electrochemically inert silicon carbide (SiC) can also be prevented, forming a silicon nano-grain uniformly dispersed in the composite material in the porous silica [6-7].

Although the physics-based crystal plasticity model incorporating many mechanisms (dislocation motion, twinning induced plasticity, non-crystalline shear band, etc.) has many advantages, it has a significant disadvantage: the increasing number of material constitutive parameters.
Symbol Description Value Units Elastic parameters C11 C12 C44 Single crystal elastic constants 168.4 121.4 75.4 GPa Slip parameters dgrain bS Average grain size Burgers vector for slip 3 × 10-5 2.55 × 10-10 m m QS* Activation energy for slip 4.0 × 10-19 J QC Activation energy for climb 2.7 × 10-19 J Ω Activation volume for climb 1.0 bS3 m3 p Top of obstacle profile 1.03 - q Bottom of obstacle profile 1.0 - islip Average dislocation spacings a dislocation travels 10.0 - v0 Dislocation slip velocity 1.0 × 10-4 m/s D0 Self-diffusion coefficient for fcc Fe 2.0 × 10-5 m3/s τsol* Solid solution strength 14.2 × 106 Pa ρ0 ρdip0 Initial dislocation density Initial dipole density 1.0 × 1012 1.0 m-3 m-3 Twin parameters btw Burgers vector for twinning 1.47 × 10-10 m Ltw* Length of twin nuclei in Burgers vectors 520.0 × btw m itw Average twin spacings a dislocation travel 1.0 - ttw Average twin thickness 1.5 × 10-7 m γsf Stacking fault energy at zero K 0.042 J/m3 VCS Cross-slip activation

Synchrotron X-ray topography (XRT) is a powerful and non-destructive technique that enables imaging large area crystals with high resolution, where extended defects such as dislocations, stacking faults and grain boundaries in crystals can be revealed [10].
Department of Energy, under Award Number DE-AR0000907.

The absence of a transition zone and a small number of oxide inclusions compared to samples sintered at lower temperatures may indicate the completion of redox reactions.
Gradient microstructure development and grain growth inhibition in high-entropy carbide ceramics prepared by reactive spark plasma sintering // J.

The grain size of FNS used in this study varied from 0.075 mm to 0.4 mm as result of the cooling process of Smelter Feni 4, Aneka Tambang Company, Indonesia.
Acknowledgement The authors would like to thank the Vlir-Uos, Belgium for providing the financial support to this research project (The South Initiative 2020-2021) with contract number: ID2020SIN281A101.

Such characteristics are expected to be applicable to the higher-quality surface machining process, and the grinding is one of the effective methods to give such a high compressive hydrostatic stress field in the vicinity of the machining zone because of the usage of abrasive grains with negative rake angles.
Relatively large number of atoms in red can be recognized around the cutting groove shoulders in Figs. 4(a) and (d), even though the height in Fig. 4(d) is 1.3 nm and lower than that in Fig. 4(a) (1.8 nm).

X-ray diffraction analysis has revealed that the size of the CVD tungsten carbides grains varies from 3 to 20 nm.
The operating ability of the multilayer coating depends on the number of layers, their microhardness and thickness.

During the hot spinning process, the crystal grains are displaced along the sliding surface of the deformation zone under the action of the three-directional deformation force.
The upper rim showed more features of dimples while there appear a large number of cleavage platforms in the spoke.

The grain size estimated for TiH2-X from the Scherrer formula [9] was 5 - 9 nm.
The number of peaks in the TPD spectrum, corresponding desorption temperatures and the amount of desorbed hydrogen provides information on the state of hydrogen in material.