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Results and their Discussion The research of a form, length, distribution and the number of graphite inclusions on thickness of a wall of the top ring has shown presence of four various zones which don't have clear boundaries among themselves: - The I zone “superficial”, 0.5 – 1.0 mm wide in which graphite inclusions are not observed; - The II zone “subsurface”, 1.0 – 2.0 mm wide, contains graphite of a “nest” form up to 15 microns long with interdendritic dot distribution Fig. 2 a; - The III zone “intermediate”, 2.0 – 4.0 mm wide, contains graphite of a lamellar rectilinear shape which is distributed in the form of interdendritic dot and lamellar graphite colonies 15 - 30 microns long Fig. 2 a; - The IV zone “main”, 10 - 12 mm wide, contains the lamellar, rectilinear graphite from 30 to 120 microns long having between-dendritic distribution Fig. 2 b, c.
About 10% on the area occupy pearlite grains with dispersion of 1.6 microns Fig. 5 a.

In the last 20 years, the granular magnetic recording media was rapidly developed and one of the important keys is the understanding of magnetization reversal in individual grain or element [5,6].
Acknowledgment This work is supported by Hibah Penelitian Dasar Unggulan Perguruan Tinggi (PDUPT) year 2019 from Ministry of Research, Technology, and Higher Education of the Republic of Indonesia with contract number NKB-1593/UN2.R3.1/HKP.05.00/2019.

The researcher expresses his deepest gratitude to the Ministry of Research, Technology and Higher Education of the Republic of Indonesia which has provided research funding through the 2019 Higher Education Advanced Applied Research (PTUPT) scheme contract number PTUPT-005/SKPP.TJ/LPPM UAD/III/2019.
Lakshminarayanan, Fine Grain Growth of Nickel Electrodeposit: Effect of Applied Magnetic Field During Deposition, Applied Surface Science. 240 (2005) 2086-2095

The technical result of the development is a simplification and economic benefit due to a smaller number of a technological method for producing powdered aromatic PEEK, convenient for washing from solvent and salts, and convenience for unloading from the reaction vessel.
Fine-grained polyarylene ether ketone powder.

Hydrogen has the smallest atomic size among all the elements and diffuses rapidly even at room temperature and accumulates at the microstructural defects such as voids, dislocations, grain boundaries, precipitates and triple junctions [4].
Acknowledgements This research was supported by the PRODEP, project number DSA/103.5/16/10908 for UPVMEX-PTC-095 and UPVMEX-PTC-097 .

Filtering method also proposed to reduce the number of unrelated documents such as XFilter, YFilter, XTrie [4].
Background XML based Publish/Subscribe system can express more and satisfy subscribers’ fine-grained interest.

In the process of drawing, grains are stretched along the drawing direction, causing work hardening.
With the annealing temperature rising, a large number of Ni2Si particles precipitates in Cu-Ni-Si alloy, which increases the strength of composite wires.

Material of calcium silicate bricks can be characterized as non-cementitious fine grained concrete.
- Decrease of ultrasonic pulse velocity becomes evident on decrease of Young's modulus of elasticity of compression and tension, because square number of this parameter is a part of its calculation

The number of polymers directly related to cement particles and the features of their adsorption are studied.
[23] Rahman A, Singh A, Harimkar S.P., Singh R.P., Mechanical characterization of fine grained silicon carbide consolidated using polymer pyrolysis and spark plasma sintering.

Table 1 Numbers of NBR sample blocks Rubber type Numbers graphite content% Shaw hardness(A) N41 #1 17.5 70 #2 29.2 90 The results and discussion Friction and Wear Performance under the Dry Sliding.Fig.1, Fig.2 show the variation of wear loss and friction coefficient with graphite content at various loads as 50N, 100N, 150 N , 175N, 200 N, 225 N under dry sliding Wear loss (mg) Load (N) Load (N) frictional coefficient Fig.1 Variation of wear loss of NBR with Graphite content at various loads under dry sliding Fig.2 Variation of frictional coefficient of NBR with Graphite content at various loads under dry sliding Fig. 1 shows that wear loss of #1 is sharply increased with the increase of load.
From the micro perspective, the rubber can be regarded as an object which has been distributed by a large number of micro convex on the surface.
From fig.7 friction coefficient changing with time can be seen: friction coefficient value is basic stable in the whole experiment process, which indicates that under the condition of water lubricated rubber wear mechanism is single abrasive grain wear and tear.