Magnetic properties of nanocomposite Fe–Pt films with Fe concentration higher than 50 at % have been investigated in this study. Fe/Pt multilayers were produced by sputtering and magnetic hardening was observed after heat treatment including rapid annealing. The final consisted the hard face-centered tetragonal FePt phase a soft face-centered-cubic phase. maximum energy products optimally processed samples exceeded 40 MGOe. Evidence for exchange coupling phases found.

ABSTRACT Saline soil is an important inorganic carbon pool and highly susceptible to environmental change. The Tarim Basin the largest inland basin around world, with saline land making up approximately 20% of its total area, while few research has been conducted on salt‐affected density distribution in region. To identify effect salinity density, we collected 135 profiles (0–100 cm), calculated organic (SOCD), (SICD), (STCD) their distribution, discussed relationships climate...

In order to enhance the load-bearing capacity of involute beveloid gear pair, this study proposes research on improving contact stress through axial modification. Under condition segmented parabolic modification, mathematical equation for tooth flank is derived. A simulation meshing model pair constructed investigate effects different amounts and lengths modification performance, changes in root stress, transmission error before after The results indicate that as amount increases, maximum...

A novel method called Real Tooth Contact Analysis (RTCA) is proposed to elucidate the tooth-face contact law of cylindrical gear with variable hyperbolic circular-arc-tooth-trace (VH-CATT gears) and predict direction size pattern. This study establishes a coating surface model for tooth coated red lead powder specific thickness, analysis considering installation errors. Utilizing three-dimensional complete mathematical TCA technology, an algorithm based on intersection principle devised...

The effect of nanostructuring on magnetostatic interactions in permanent magnets is investigated by model calculations. Emphasis the energy product as a function packing fraction magnetic phase, magnet’s macroscopic shape, and nanoscale feature size. main difference between nanostructured bodies, namely, transition coherent incoherent reversal, has far-reaching impact demagnetizing field product. For small magnet sizes, substantially enlarged, up to μ0Ms2/4 for soft materials, but this...

Two-phase nanostructures of hard L10-ordered FePt and soft iron-rich fcc Fe-Pt are investigated experimentally by model calculations. The thin films were produced epitaxial co-sputtering onto MgO have a thickness about 10 nm. They form two-phase dots that cover large fraction the surface but separated from each other. X-ray diffraction TEM show c-axis phase is aligned in direction normal to film plane. experimental theoretical hysteresis loops indicate archetypical exchange coupling,...

This paper presents results on the synthesis and properties of FePt- CoPt-based high-anisotropy nanocomposite films. These films consist high anisotropy L1/sub 0/ CoPt or FePt particles embedded in a nonmagnetic matrix such as C, SiO/sub 2/, B/sub 2/O/sub 3/. The grain size magnetic these ran he controlled by processing temperatures film compositions. Particularly FePt:B/sub 3/ c-axes grains can be made to align along normal direction, resulting with perpendicular anisotropy....

The structural and magnetic properties of Co:C nanocomposite films at room temperature were investigated as functions annealing temperature, Co concentration, film thickness. as-deposited films, which cosputtered from C onto water-cooled glass substrates, are nonmagnetic amorphous Co–C alloys. Hexagonal-close-packed (hcp) grains formed in 100 nm annealed 300 °C most takes this structure when higher temperatures. sizes the range 10 to 25 nm, with larger grain size resulting concentration....

Accurate rock mass quality classification is crucial for the design and construction of underground projects. Traditional methods often rely on expert experience, introducing subjectivity, struggle with complex geological conditions. Machine learning algorithms have improved this issue, but obtaining complete datasets difficult due to high cost procedures. This study proposed a hybrid XGBoost model predicting using incomplete datasets. The zebra optimization algorithm (ZOA) Bayesian (BO)...

SmCo x – Co (x=3.5, 4, and 5) nanostructured multilayers have been prepared by dc rf sputtering. Magnetic hardening has found in the as-deposited thin films. The effects of hard-phase layer thicknesses effect Cr underlayer studied. Further magnetic achieved heat treating samples. A remarkable increase coercivity obtained nanocomposite films, with coercive force up to 40 kOe. Transmission electron microscopy, atomic microscopy observations performed understand nanostructure domain structure.

Nanostructured NdFeB films were prepared by magnetron sputtering followed rapid thermal annealing at a ramp rate of 200 °C/s. Isotropically oriented Nd2Fe14B crystallites formed in the and coercivities up to 20 kOe remanence ratios 0.8 obtained. Transmission electron microscopy analysis shows that majority phase magnetic layer high coercivity consists nanocrystallites with an average size about 50 nm. These are believed be single-domain particles, which responsible for coercivities. MFM...

Several systems of nanocomposite thin films have been prepared by plasma sputtering and heat treatment. By choosing suitable multilayer structures the as-deposited subsequent heat-treatment processes, nanostructures tailored. The thermal processing is key to control morphology. Appropriate processes found for studied, which result in desired nanostructures. For first time a nearly ideal nanostructure with soft-phase grains embedded homogeneously hard phase has obtained FePt-Fe/sub 1-x/Pt/sub...

Low-density foam targets were fabricated by direct laser writing using two-photon polymerization (2PP). The used in high-energy-density shock-propagation experiments carried out on the NIKE system at Naval Research Laboratory (NRL). basic target comprised a rectilinear rod with log-pile-like microstructure overall dimensions of 2000 × 250 315 μm3 and nominal density ~100 mg/cm3. block is topped 15-μm-thick, full-density ablation layer that integrated into 2PP printing process. main challenge...

Rare earth–cobalt (RCo, R=Sm, Pr) films with thicknesses from 30 to 700 nm have been prepared and without a Cr underlayer by dc magnetron sputtering R2Co7 composite target. The as-deposited SmCo (SmCo∥Cr) magnetic coercivities of about 500–2800 Oe the PrCo∥Cr 100–300 Oe, but after annealing at 500 °C as high 31 kOe for SmCo∥Cr 10 were observed. PrCo are composed mostly an amorphous phase vol % crystallites film is transformed completely diameter revealed high-resolution transmission electron...

Abstract. To improve the bearing capacity and provide mathematical model basis for vibration noise reduction of variable hyperbolic circular-arc-tooth-trace (VH-CATT) cylindrical gear, tooth surface modification design method based on parabolic forming blade cutter inclination was proposed. The geometric inclined completed. modified equation deduced, influence parameters curvature characteristics analysed further. contact analysis (TCA) established, elliptical area analysed. Research shows...