Search results

Introduction The hollow microsphere is a kind of special nuclear shell grain which is made up by air and dissolvent.
The gas still contains a large number hollow microsphere.

Method Dividing the 90 specimens into three average groups numbered and labeled.
Observing its surface defects, Measure its tangential, radial and parallel to the grain direction dimensions after drying.

Conventional diamond burs used for grinding operations, with its head made of diamond particles embedded into nickel coating and its shank made of stainless steel, have a number of problems associated with heterogeneity of the crystallites, decreased cutting efficiency, need for repeated sterilization and short life [1].
The basic limitation of the process is that diamond grains adhere to the tool surface only by mechanical interlocking with a nickel layer.

The number density of the white phase was significantly reduced and the size is larger than that of the alloy without the addition of Ni, as indicated in Fig. 1b.
High volume fraction of γ´ precipitates, high population oxide dispersion and fine-grained microstructure are responsible for the increase of internal stress, leading to the propagation of cracks [14-15].

A number of methods have been developed for the synthesis of CuS nanostructures including a hydrothermal route, organogel, hydrogelassisted synthesis, template free chemical route, microemulsions route, precursor decomposition route, solid-state reaction route, sonochemical synthesis, non-aqueous solution process, pickering emulsion route, microwave irradiation techniques, pyrolysis of single source precursors and so on.
Fig. 1a) XRD pattern of CuS nanorods b) gold coated on CuS nanorods The average particle size from the most intense peak was estimated to be 30 nm using the Debye-Scherrer formula [15]: D = kλ/βcosθ (1) where D is the mean grain size, k is a geometric factor, λ is the X-ray wavelength, β is the FWHM of diffraction peak and θ is the diffraction angle.

Large number (more than 200) of indents was performed on each sample.
In the SEM image of the composites single nc-TiC particles dispersed at the boundaries and inside the grains of 316L steel, and irregularly dispersed aggregates of TiC appeared.

In accordance with CSN EN 413-1 [1], cement is defined is industrially produced fine grained hydraulic binder, which achieves strengths predominantly by Portland clinker.
Registration number CZ.1.07/2.3.00/20.0111 and project GACR P104/12/1988 „Study of interactions of components of cementitious composites exposed to high temperatures”.

The Scheme of the Numerical Simulation Test Number Outer diameter of the tube -wall thickness [mm] Billet size [mm] Extrusion ratio 1 135×22 Ø145×220 2.11 2 Ø155×220 2.37 3 Ø158×220 2.51 Fig.2.
Hydrostatic extrusion of commercial magnesium alloys at 100°C and its influence on grain refinement and mechanical properties[J].

In this paper, the complexity analysis method based on Jensen-Shannon Divergence was used to calculate the complexity of the idle states, the close eyes states and the count numbers states electroencephalogram.
The principle For time series x whose length is N, {x(i):1iN}, given time scale factorτ, the original time series x coarse graining [18] according to the following ways: (1jN/τ) (1) We denoted p1; p2 as two probability distribution of discrete random variables X while (1) stands for the KULLBACK direct difference I

This paper proposes the following three aspect improvements by inspecting a large number of documents and information.
According to their role in the strengthening mechanism of steel, common alloying elements can be divided into: solid solution strengthening element(Mn, Si, Al, Cr, Ni, Mo, Cu); grain refinement element(Al, Nb, V, Ti, N); precipitation hardening element(Nb, V, Ti); and phase transformation strengthening element(Mn, Si, Mo).