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Marked progress was due by, principally, high level and/or unique combination of a number of structure-related physical properties (principally magnetic and mechanical) of alloys in disordered state [3-5].
The annealing purpose is the obtaining nanocrystalline state to all product volume without transition into temperature range in which recrystallization process leads to structure with larger grains having significantly worse properties, is implemented.
It can be assumed, that the phases separation on grain boundary are process taking priority of one fast growth at recrystallization.

By repeating this process a number of times a solid 3D object of intended shape is fabricated.
At slow and fast cooling rates, the β-phase transforms to the acicular α-phase and metastable hexagonal α’-martensite and some residual β at grain boundaries, respectively.
Owing to the high temperature gradients that happen during the SLM process, the microstructure of the as-built SLM samples comprises of a martensitic α′-phase within prior β grains that are mostly aligned with the building direction.

Ultrasonic liquid processing depends on a number of parameters, such as amplitude, pressure, temperature, and viscosity.
Katgerman, Influence of ultrasonic melt treatment on the formation of primary intermetallics and related grain refinement in aluminum alloys, J.
Ma, Ultrasonic grain refinement of magnesium and its alloys, InTec, Available from: (2011).

Research in natural fibres, such as sisal, coconut, flax, jute, hemp, bamboo, wood, palm fibres, straw, and their possible application in and outside of civil engineering is being carried out by a number of experts worldwide, e.g.
As an aggregate, lightweight expanded glass with grains sized 0.25‒0.5, 0.5‒1 and 1‒2 was chozen and also expanded perlite, grain size 0.315‒2.5.

Design principles of thermal insulation materials (1)Optimize the design of the grain size and grain gradation of styrofoam particles and the best ratio of that with other gelled material to make the density, thermal conductivity, heat storage coefficient, shrinkage and strength and other performance indicators have been optimized
(3)The introduction of additives make a large number of bubbles, cut off the heat transmission channel, not only reached the thermal insulation effect, but also improve the water keeping effects, the degree of cement hydration and insulation strength

Fig.2 also show that the shrinkage rate for all the samples reaches to peak value at about 1700 °C, a large number of low-viscosity liquid should is formed, which indicates that the formation of SiAlON has little been affected by h-BN.
There should initiate microcrack in SiAlON/BN composite materials during cooling after sintering, and the cohesion between grains is incremented, and the thermal stress also be erased fowling the microcrack closed when test sample heating.
Kim, Growth of elongated grains in α-SiAlON ceramics, Mater.

A number of cutting experiments with single abrasive grit were performed to study the mechanism of grit-workpiece interaction [1].
Simulative model of single grit cutting Geometric Model of Single Grit In authors’ previous research, white light interferometer was employed to measure the surface topography of alumina grinding wheels with different grain size [8].
Rong, Research on microscopic grain-workpiece interaction in grinding through micro-cutting simulation, part 2: factorial study, Adv.

When increasing the charge to 2C, the Sn grains increase and begin to show a tetragonal crystal shape while the pore size reduced a little (Fig. 2b).
The Sn grains also grow over 200 nm with a clear tetragonal structure.
With the increase of cycle number, the charge and discharge plateaus are becoming less obvious, which indicate the capacity loss with cycles.

The samples used for experimental DTA in microwaves have been a homogeneous mixture of Fe2O3+BaCO3 with the follows characteristics: Table 1 The characteristics of the sample heated in microwaves field Sample Characteristics Code Sample Milling Time [ h ] Grain size [ nm ] Pressing Force [ MPa ] Sample Size Height/Diameter [ mm ] HM 0 1120 300 4/12 HM5 5 400 300 4/12 HM20 20 100 300 4/12 The inert material used in experiments was barium ferrite type M sintered in conventional furnace with electrical resistance.
An important observation is the temperature evolution in the inert material without milling time, because this behaviour shows us that will not be necessary to use a planetary ball to mill the homogeneous mixture to reduce his grains size to obtain a easy heating in microwave field.
Acknowledgement This work was partially supported by the grant number 47c/2014, awarded in the internal grant competition of the University of Craiova References [1] I.

Since the surface free energy is considered to be a driving force in the sintering process, a number of sintering models have been researched for the initial stage of sintering and the resulting equations can be summarized as follows[15]
(4) Where K1 and w are constant, D is the diffusivity, γs is the surface energy, Ω is the atomic volume, G is the particle or grain size, k is the Boltzmann's constant, T is temperature, t is sintering time and m is a constant depending on the diffusion path.
Kang (2005) Sintering: Densification, Grain Growth & Microstructure, Elsevier Butterworth- Heinemann, Burlington.