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Alloy C Si Mn Cr Ni Mo Mg Al SiMo51 3.17 4.15 0.40 0.10 0.04 0.86 0.052 - SiMo1000 3.57 2.72 0.25 0.07 0.84 0.81 - 3.08 Both materials have a ferritic matrix with dispersed graphite nodules and Mo-carbides at the grain boundaries.
Hence, it can be concluded that SRTC test can be performed in air, as long as the number of cycles are kept low.

With the reference of COD card number 96-100-0027, MgB2 has space group of P6/mmm, hexagonal crystal structure, lattice parameter of a=3.0850 Å and c=3.5230Å, and the density of 2.63 g/cm3.
In Figure 3b, the shape structure of micro cracks occur between the grain boundaries and form clumps.

The degradation of metallic materials under high-cycle fatigue (HCF) mainly takes place at stress levels within the elastic regime: fatigue damage is produced by cyclic plastic deformations at the grain level, which lead to the appearance of slip bands up to the nucleation of microcracks.
Damage increment in the case of crack-nucleation-dominated fatigue The total fatigue life is crack-nucleation-dominated (i.e. the load cycle number to failure mainly depends on the crack initiation life, while the crack propagation life is negligible) in the case of initially undamaged structures.

Moreover, too high solution temperature leads to the obvious growth of grain and reduces the area of crystal boundary in unit volume.
A number of experiments are executed for testing the conductivity of two alloys at different temperature after aging treatment.

A number of abrasives can press in and scratch the glass surface to remove materials (Fig. 2b).
But other cracks or large grain boundary can change the expansion direction.

Phillips (1983)): - microfilled - grain sizes vary in the range of 0.04-0.4 microns - Degufill (Degussa); Jasopas (Vivadent); Filtek (3M ESPE); - minifilled - 1-5 microns - Visio-Fil (ESPE), Bisfil Marathon V (Den-Mat); - macro-filled - 8 microns and more - Concise (3M ESPE), Adaptic (Dentsply), Evikrol (Spofa Dental); - microhybrid - there are 2 types of filler - with particle sizes of 1-5 microns and 0.04-0.1 microns - Artemis (Ivoclar Vivadent), Charisma (Heraeus Kulzer), Filtek Z250 (3M ESPE), GC Gradia Direct ( GC Europe), Miris (Coltène Whaledent), Revolcin Fil (Merz Dental), Venus (Heraeus Kulzer), Point 4 (Kerr); - macrohybrid - 8-12 microns and 0.04-0.1 microns - Evicrol Molar (Spofa Dental); - hybrid maximally filled (fully executed) compositions - 0.01-0.1 microns, 1-5 microns, 8-5 microns, 1-5 microns; - nanofilled (nanocluster) - up to 100 nm - Filtek Supreme XT (3M ESPE); - nanohybrid - a mixture of sizes 0.004-3 microns - Premise (Kerr), Ceram-X (Dentsply), Synergy
It should be noted that the main difference between polymers of different grades is the amounts of copolymers and crosslinks, the change in the number of which affects the change in their molecular structure.

Nanocomposite coatings consist from two or more separated phases with nanocrystalline and amorphous structure or combination of them and represent a new class of materials in compare with traditional coarse–grained materials [3–6].
Sample number pN2 (Pa) H (GPa) E (GPa) EU (eV) E'g (eV) Eg0 (eV) 3 0.265 10.53 148.64 0.630 3.87 4.8 4 0.32 13.11 149.03 0.675 3.87 5.0 5 0.42 14.53 183.01 0.684 3.96 5.1 6 0.48 13.10 161.09 0.674 3.88 5.1 7 0.40 – – 0.830 3.80 5.0 interband D′(hn) and exponential absorption D(hn) overlap, that indicates about formation the fundamental absorption edge which is specific for deposited coatings and substantially different from optical edges of crystals of AlN and Si3N4 (Table 1).

The electrical conductivity (σ)was calculated from the following equation 1 [26]: " (1) Where t is the thickness of the thin film, W is the distant fingers (10mm), ℓ is the number of fingers is to be (10), and L is the space between electrodes (100µm).
It can be seen that the size grain of ZnO encapsulated with POT-DBSA, for POT-DBSA/ 5% ZnO particle size is (37.41) nm, reduced with increasing ZnO nanoparticles content for POT-DBSA/ 15% ZnO particle size ( 15.45) nm), due to the possibility of agglomeration of ZnO particles, and dopant POT have declined.

In the case of the PVD coated insert, a flank wear width of 0.15 mm developed after Fig. 5: Flank wear development versus the number of cuts (a) in rough turning and (b) in finishing, using the manufactured PVD and MTCVD coated inserts.The equivalent stress distributions at the cutting edge region in a roughing process for both PVD and Fig. 6: FEM model for the determination of stress distributions in the cutting edge.
Makrimallakis, Influence of dry micro-blasting grain quality on wear behaviour of TiAlN coated tools, WEAR. 271 (2011) 783-791

Grain size and structure of the obtained product can be analyzed with electron microscope.
Because of limited number of samples it was preferred to preserve maximum compression force 60N, requiring repeated procedures or some other procedures.