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An overview of the x-ray diffraction characterization results of Ba0.6Sr0.4Fe11.5Al0.5O19/NiFe2O4 composites using GSAS software. wRp: 3.09, and χ2 : 1.317 Phase System SG Lattice parameters (Å) Fraction V r D a b c (%) (Å3) (g.cm-3) (10-9m) BaFe12O19 Hexagonal P 63/mmc 5.8765(6) 5.8765(6) 23.094(3) 12.01 690.6(2) 5.828 135 NiFe2O4 Cubic F d -3 m 8.3253(3) 8.3253(3) 8.3253(3) 87.99 577.04(7) 5.590 79 Figure 2 displays the surface morphology and grain shape of the Ba0.6Sr0.4Fe11.5Al0.5O19/NiFe2O4 composite sample as a result of SEM characterization.
The Maxwell-Wagner model assumes that the material structure comprises a grain phase that conducts more strongly than the grain boundaries at the interface. [47].
Acknowledgement Thank the Directorate General of Higher Education, Research, and Technology, Ministry of Education, Culture, Research, and Technology, for funding this research under contract number 819/LL3/AL.04/2024, which was awarded by the Ministry of Research, Technology, and Higher Education under contract number 030/LPPM-UPH/VI/2024.

This behavior signified that the fluid is fully convected for higher Darcy number.
Other areas of applications are in food processing, grain storage, soil heating, storage of radioactive waste, porous radiant burners [5], and uncovered flat plate solar collectors having rows of vertical strips collector [6] etc.
Furthermore, the absolute value of local Nusselt number for MWCNT is more than SWCNT.
Parametric studies of the effect of Darcy number and the mixed convection parameter, Richardson number on the flow behavior and heat transfer have been performed.
· For lower Darcy’s number, the distribution of contour patterns is eventually similar for both values of Richardson’s number considered in this work

Although there are large numbers of medical literature, but penetrates its content to be actually irregular, the literature data lacks has the systematic analysis to make uniform, so that the application value relative reduces largely.
A large number of medical literature knowledge maps Earlier about the build process of a single medical document knowledge map, knowledge maps you want to want to build a large number of medical literature, we start with one of the medical literature knowledge map as the Center, and then look for this medical literature most likely knowledge map, here through literature matrix to identify key words and the knowledge structure of centre of knowledge map is most similar.
Used to identify the most similar knowledge maps of a complex number is: .
This quantitative indicator is s = (N-n)/N, where s is the structure stability of map i, N is the amount of documents represented by the focal map, n is the number of documents which really cause the map’s changes
ESOM using very small numbers as the learning rate to train with the merged document terminology matrix knowledge map.

The excellent properties of UHSS are achieved by employing common alloying elements (carbon, manganese, silicon, nickel, chromium and molybdenum), micro-alloying (Nb, Ti, V, B) and basic metallurgical strengthening mechanisms such as grain refinement, precipitation hardening, solid solution hardening, transformation hardening and dislocation hardening [9,13].
This phenomenon is related to a number of factors such as the hardness and microstructure of the steel, the magnitude of the tensile residual stress, and the level of diffusible hydrogen in the form of atomic hydrogen that is absorbed into the weld pool during welding [19].
A study using continuous and pulsed current in GTAW of a Ni-Cr-Si based medium carbon UHSS [39] shows that the pulsed mode current results in finer grain size, and smaller martensitic platelets coupled with a reduced tendency for segregation.
MR (martensite), parent material [8] In this comparison, continuous current welds exhibited columnar grain morphology whilst pulse current welds had predominantly equiaxed grain morphology.

Average monthly performance of the sinter plant Indicators The performance value for the period Specific productivity, [t/(m2•h)] 0.93-1.15 / 1.11 The vertical speed of sintering, [mm/min] 17.34-24.01 / 20.32 The content of fine-grained concentrates in the charge, [%] 56.1-69.6 / 62.0 The vacuum in the reservoir, [kPa] 4.74-6.71 / 5.76 The height of the charge layer, [mm] 248-305 / 277.6 The returns content in the charge, [%] 22.5-27.5 / 25.2 The charge temperature, [°C] 40.0-61.0 / 51.6 The carbon content in the charge, [%] 3.27-5.09 / 4.04 Lime consumption, [kg/t] 17.9-30.1 / 28.8 The iron content in the sinter, [%] 50.3-55.4 / 52.7 The sinter basicity for CaO/SiO2, [u] 1.33-1.85 / 1.58 The fines content in the sinter (FR. 0-5 mm), [%] 13.7-17.0 / 15.7 Strength values, [%]: shock 65.0-72.3 / 68.2 abrasion 4.9-5.4 / 5.2 Note: in the numerator – changes interval, in the denominator - the average value.
Despite the limited amount of fine-grained concentrates in the sinter charge, acceptable specific lime consumption (29 kg/t) and the hot return use, the performance indicators of the sinter charge production of the JSC "Ural Steel" are among the lowest in the industry.
This, along with poor technical condition of exhaust gases path, limits the height of the sintered layer, the productivity of the shop and prevents the fine-grained concentrates increase [2 – 4].
Producing a more uniform grain size of the pelletized charge with a minimum amount of fines contributes to the increase of porosity of the sintered layer, and the higher strength of sinter charge pellets allows maintaining high gas permeability during sintering, preventing compaction of the charge under the action of vacuum.
The most significant increase in strength characteristics of the sinter charge was observed if surfactant consumption was 1.6 l/h when the number of the fines formed after flushing was reduced from 10.5 – 11.0 % to 8.5 – 9.5 %.

Introduction As we known, the number of deep & ultra deep- and complex- wells is gradually mounting in onshore oilfield exploiting.
From the difference in polymer concentration contained in the initial solution and the filtrate of cement slurries, the adsorbed amount of polymer on cement grain was calculated.
As adding the polymer amount, the API filtration and permeability of set cement deceased obviously while its adsorbed amount on cement grains would gradually increase.
Further adding the polymer, the permeability of set cement, API filtration of cement slurry and adsorbed amount of PADMO-V @NS on cement grains kept fairly consistent.
c b a Fig.9 SEM images of cement filter cake: (a) net, (b) 0.72% PADMO, (c) 0.72% PADMO-V@NS Fig. 10 Comparative consistency curves of slurry with different filtrate reducer in 210℃ (BHCT) Fig. 11 API filtration, permeability and adsorbed amount of PADMO-V@NS on cement grains (T= 80℃, w/c=0.44) Conclusions A novel polymer/silica nanocomposite used as fluid loss control additive was prepared through an in situ free radical copolymerization.

Indeed, oxidation experiments on Ni-base alloys have demonstrated the occurrence of two different types of base metal damage: penetration of oxygen in the grain boundaries and the formation of a Crdepleted metal layer immediately below the Cr2O3 oxide inner sub-layer as a consequence of the selective oxidation of Cr [1].
Several hypotheses have been proposed to explain this accelerated diffusion, such as the presence of a perturbed layer near the alloy surface that contains small grains and large density of defects [3] or a massive injection of vacancies into the metal caused by the growth of the oxide layer [13-15].
The model EKINOX does not make the classical steady-state hypothesis, and is thus able to study transient stages, evolutions in a finite size substrate due to oxidation and effects of microstructural changes, such as grain growth or dislocation density evolution.
All calculations have been done with an initial number of slabs Ns =132 having a typical initial thickness of 0.25 µm.
This can be done following previous work on a model developed to simulate the irradiation assisted segregation at grain boundaries of austenitic steels [25-26].

Large agglomerated grains were uniformly distributed and adhered to the substrates well.
High porosity, voids, and trapezium-shaped grains are also available in large numbers, and a more effective surface area has been observed for oxygen species adsorption.
A deep charged depletion layer forms across the grain boundaries of ZnO and CuO in a gaseous environment, resulting in p-n heterojunctions.
The Field emission scanning electron microscopy micrograph shows high porosity, voids, and trapezium-shaped grains as well as small particle size.

Small grain sized microstructure containing finely distributed hard carbides give rise to a surface coating having excellent combination of hardness and toughness.
Surface areas on the specimens 2.5×1.8 mm² were randomly chosen to show a huge number of carbides randomly distributed within the matrix.
Finer precipitations are formed in hardfacing sample with short cooling-off time M10C, where also small precipitations on grain boundaries [27] can be observed (Fig. 2a).
Other material properties like ductility, residual stresses and grain size [30] may have higher importance on the behavior under combined impact/abrasion.
[30] Da-yong Wu, Fu-ren Xiao, Bin Wang, Jia-ling Liu, Bo Liao, Investigation on grain refinement and precipitation strengthening applied in a high speed wire rod containing vanadium, Mat.

In Air In target gas Hole accumulation layer qV s11 (a) (b) holes O - Grain boundary Grain boundary 2CO + O - = 2CO 2 + e - CO CO 2 R O - O - O - O - O - O - O - O - O - O - O - O - O - O - O - O - O - O - and/or 2H 2 + O - = 2H 2 O + e - CuO (CO 3 ) 2 - qV s21 holes Grain boundary Grain boundary R qV s22 holes qV s12 holes O - O - O - Physical model Energy band diagram CuO/Rb 2 CO 3 Oxygen ion Rb 2 CO 3 Energy barrier Energy barrier Energy barrier Energy barrier e - e - CO CO 2 CO 2 e - Physical model Energy band diagram Neutral region Fig. 8.
Acknowledgments This research is funded by Le Quy Don Technical University Research Fund under the grant number "24.1.24".