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Journal articles on the topic 'Hard-phase synthesis'

Author: Grafiati

Published: 30 May 2022

Last updated: 31 July 2025

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1

Chen, Z. S., W. P. Yang, and C. W. Macosko. "Polyurea Synthesis and Properties as a Function of Hard-Segment Content." Rubber Chemistry and Technology 61, no. 1 (1988): 86–99. http://dx.doi.org/10.5254/1.3536179.

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Abstract High-molecular-weight linear polyureas of different hard-segment content are obtained with a two-step solution polymerization. Elimination of water, careful choice of solvent, reactant concentration, and good control of reaction temperature are essential to obtain satisfactory results. We have studied the influence of the hard-segment content on the mechanical, dynamic-mechanical, and thermal properties of these solution polymerized amine-terminated polypropylene-oxide-based thermoplastic polyureas. Two-phase morphology is predominant within the range of the hard-segment concentration

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2

Tsonev, Tsvetomir, Michael Herzog, and Sanchi Nenkova. "Shape memory polyurethanes based on recycled polyvinyl butyral. I. Synthesis and morphology." Open Chemistry 11, no. 12 (2013): 2058–65. http://dx.doi.org/10.2478/s11532-013-0331-3.

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AbstractShape memory polyurethanes (SMPUs) were synthesized by 4,4′-diphenylmethane diisocyanate (MDI), hexane-1,6-diol (HD), polypropylene glycol (PPG), and recycled polyvinyl butyral (PVB). Dynamic mechanical analysis, differential scanning calorimetry and Fourier transformation infrared attenuated total reflection spectroscopy was used to characterize the poly (vinylbutyral-urethanes). Micro-phase domain separation of hard and soft segments and phase inversion were investigated. Increasing the hard segment content, i.e., average hard segment molecular weight, leads to an increase in the deg

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3

Volodchenkov, A. D., Y. Kodera, and J. E. Garay. "Synthesis of strontium ferrite/iron oxide exchange coupled nano-powders with improved energy product for rare earth free permanent magnet applications." Journal of Materials Chemistry C 4, no. 24 (2016): 5593–601. http://dx.doi.org/10.1039/c6tc01300g.

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4

Saito, Tetsuji, and Masaki Ichihara. "Synthesis and magnetic properties of Sm5Fe17 hard magnetic phase." Scripta Materialia 57, no. 6 (2007): 457–60. http://dx.doi.org/10.1016/j.scriptamat.2007.05.037.

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Fan, Quan Run, and Feng Pan. "Technology Mapping for Heterogeneous FPGA in Different EDA Stages." Applied Mechanics and Materials 229-231 (November 2012): 1866–69. http://dx.doi.org/10.4028/www.scientific.net/amm.229-231.1866.

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In traditional EDA flow, Technology mapping is performed after logic synthesis. Besides programmable logic blocks, heterogeneous FPGAs also have some hard blocks, such as memory block and multiplier, built in it. After logic synthesis, it will be difficult for technology mapping to find sub-circuits that can be implemented in hard blocks. In this paper, a systematic technology mapping approach is proposed. In the design phase, with the support of CAD tools, a module based design approach is used to map some design block to large hard blocks. During register transfer level synthesis, some funct

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Farzaliyev, V. M., and M. N. Aliyeva. "Feature analysis of vapor-phase chromatography of high boiler organic compounds." Azerbaijan Oil Industry, no. 4 (April 15, 2020): 40–47. http://dx.doi.org/10.37474/0365-8554/2020-4-40-47.

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The paper presents the physical-chemical features of the vapor-phase chromatography method for the analysis of polar high boiler organic compounds. The application conditions of vapor-phase chromatography for the research of petrochemical synthesis products are analyzed. The mechanism of chromatographic seperation of compounds in the vapor-liquid-solid phase system is reviewed. The physical-chemical parameters of application of vapor-phase chromatography are provided. It is shown that liquid crystals can be used for the efficiency increase of the analysis of high boiler organic compounds as ha

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Nahda, Dinda P. N., Afiten R. Sanjaya, Fitria Rahmawati, et al. "Synthesis of mesoporous carbon from banana peels with silica gel 60 as the hard templates." RSC Advances 15, no. 6 (2025): 4536–45. https://doi.org/10.1039/d4ra08322a.

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Tavakolinia, Faezeh, Mohammad Yousefi, Seyyed Afghahi, Saeid Baghshahi, and Susan Samadi. "Synthesis of novel hard/soft ferrite composites particles with improved magnetic properties and exchange coupling." Processing and Application of Ceramics 12, no. 3 (2018): 248–56. http://dx.doi.org/10.2298/pac1803248t.

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SrFe12O19/Zn0.4Co0.2Ni0.4Fe2O4 hard/soft ferrite composite particles with 20, 40, 60 and 80 wt.% of soft phase were prepared by one-pot sol-gel auto-combustion and physical mixing methods. Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), field emission scanning electron microscope (FESEM) and vibrating sample magnetometer (VSM) were used to characterize the structural and magnetic properties of the samples. XRD spectrum revealed the formation of mixed ferrite phases in the composite particles. The hysteresis loops of the samples showed the presence of exchange coupling

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9

Jung, Yang-Sook, Sunhee Lee, Jaehyeung Park, and Eun-Joo Shin. "One-Shot Synthesis of Thermoplastic Polyurethane Based on Bio-Polyol (Polytrimethylene Ether Glycol) and Characterization of Micro-Phase Separation." Polymers 14, no. 20 (2022): 4269. http://dx.doi.org/10.3390/polym14204269.

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In this study, a series of bio-based thermoplastic polyurethane (TPU) was synthesized via the solvent-free one-shot method using 100% bio-based polyether polyol, prepared from fermented corn, and 1,4-butanediol (BDO) as a chain extender. The average molecular weight, degree of phase separation, thermal and mechanical properties of the TPU-based aromatic (4,4-methylene diphenyl diisocyanate: MDI), and aliphatic (bis(4-isocyanatocyclohexyl) methane: H12MDI) isocyanates were investigated by gel permeation chromatography, Fourier transform infrared spectroscopy, atomic force microscopy, X-ray Diff

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10

Jeong, Ji Hun, Hao Xuan Ma, Doyun Kim, et al. "Chemical synthesis of Nd2Fe14B hard phase magnetic nanoparticles with an enhanced coercivity value: effect of CaH2 amount on the magnetic properties." New Journal of Chemistry 40, no. 12 (2016): 10181–86. http://dx.doi.org/10.1039/c6nj02436j.

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Nd<sub>2</sub>Fe<sub>14</sub>B hard phase magnetic nanoparticles were successfully synthesized using a chemical synthesis route followed by a reduction and diffusion process without consuming a large amount of energy.

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11

NOMIZU, MOTOYOSHI, YOSHIMASA INAGAKI, TAKEYOSHI YAMASHITA, et al. "Two-step hard acid deprotection/cleavage procedure for solid phase peptide synthesis." International Journal of Peptide and Protein Research 37, no. 2 (2009): 145–52. http://dx.doi.org/10.1111/j.1399-3011.1991.tb00095.x.

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Abukaev, Ainur F., Marina A. Gorbunova, Denis V. Anokhin, and Dimitri A. Ivanov. "Effect of Geometrical Confinement on Ordering of Thermoplastic Polyurethanes with Crystallizable Hard and Soft Blocks." Crystals 13, no. 12 (2023): 1662. http://dx.doi.org/10.3390/cryst13121662.

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A series of multi-block thermoplastic polyurethanes incorporating different soft block structures was synthesized. This was achieved using a poly(butylene adipate) oligomer combined with its macrodiols of both an aromatic and aliphatic nature. The composition of the hard block included 1,6-hexamethylene diisocyanate, 4,4′-diphenylmethane diisocyanate, and 1,4-butanediol. For the first time, the structural evolution and phase composition of both the hard and soft segments were analyzed during in situ thermal treatments. A combination of synchrotron small- and wide-angle X-ray scattering, differ

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13

Zhigalov, V. S., V. G. Myagkov, G. I. Frolov, et al. "Solid-State Synthesis of Co-Sm(110) Epitaxial Films with Large Magnetocrystalline Anisotropy." Solid State Phenomena 168-169 (December 2010): 188–91. http://dx.doi.org/10.4028/www.scientific.net/ssp.168-169.188.

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Solid-state synthesis of a Sm2Co7 (110) hard magnetic phase prepared by successive deposition of Co and Sm layers onto a MgO(001) surface at a temperature of 400 С has been experimentally studied. Upon annealing at 500 С, the structure of the material changes, which leads to the formation of an epitaxial Sm2Co17 (110) phase. The first and second magnetocrystalline anisotropy constants of the Co-Sm have been determined.

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Liu, Maoyuan, та Lei Chen. "Research on Magnetic Property of Nd2Fe14B/α-Fe Nanocomposite Under Different Roller Speeds". Open Materials Science Journal 8, № 1 (2014): 127–30. http://dx.doi.org/10.2174/1874088x01408010127.

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Nano-composite permanent magnetic material is a new type of permanent magnetic material, and it is the synthesis of soft and hard magnetic phase within the nanoscale. On the basis of exchange coupling hard magnetizing theory, nano-composite permanent magnetic material can, at the same time, have high residual magnetization intensity of soft magnetic phase and high coercivity of hard magnetic phase, which can be developed into new generation high performance permanent magnetic material. Nevertheless, magnetic energy of permanent nano-composite magnet derived from experiments differs greatly fro

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15

Jo, Nam Ju, Do Hee Lim, Young Min Song, Geong Mi Bark, and Won Ki Lee. "Synthesis and Properties of Polyurethane-Based Actuator with Poly(dimethyl Siloxane)." Materials Science Forum 620-622 (April 2009): 299–302. http://dx.doi.org/10.4028/www.scientific.net/msf.620-622.299.

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This paper investigated the use of electrostrictive polymers with compliant electrodes as a means of actuator. In many electrostrictive materials, especially polyurethane (PU) can produce large deformation and force because of its low elastic modulus.The electromechanical response is mainly due to Maxwell stress effect and electrostriction effect. When a thin film of dielectric elastomer is applied to an electric field, it will experience Maxwell stress caused by interactions of free charge between the electrodes and electrostriction caused by the reorientation of polar phase in the material.

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16

Attfield, J. "New electronic perovskite oxides from beyond high pressure synthesis." Acta Crystallographica Section A Foundations and Advances 70, a1 (2014): C615. http://dx.doi.org/10.1107/s205327331409384x.

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Materials synthesised from high pressure (HP) conditions offer a variety of possibilities for the discovery of new electronic and magnetic phenomena. Recovery of a solid to ambient pressure (AP) from its HP thermodynamic stability field effectively introduces a large negative pressure that can drive the material into an unusual electronic ground state; as illustrated by HP structural and property studies of PbRuO3 and BiNiO3. PbRuO3 is synthesised at 10 GPa and shows an orbitally ordered phase at AP and low temperatures that is suppressed at an apparent quantum critical point near 6 GPa [1]. A

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Siljanovska Petreska, Gordana, Arantxa Arbe, Clemens Auschra, and Maria Paulis. "Mechanical and Morphological Properties of Waterborne ABA Hard-Soft-Hard Block Copolymers Synthesized by Means of RAFT Miniemulsion Polymerization." Polymers 11, no. 8 (2019): 1259. http://dx.doi.org/10.3390/polym11081259.

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High molecular weight waterborne ABA block copolymers of styrene (St) and 2-ethylhexyl acrylate (2EHA) containing hard and soft domains were synthesized by means of RAFT (mini)emulsion polymerization using a bifunctional symmetric S,S-dibenzyl trithiocarbonate (DBTTC) RAFT agent. Miniemulsion polymerization was initially used for the synthesis of the A-block, which forms hard domains, followed by 2EHA pre-emulsion feeding to build the B-block soft domains. Polymerization kinetics and the evolution of the Molecular Weight Distribution (MWD) were followed during the synthesis of different ABA bl

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18

Dos santos-García, Antonio J., Elena Solana-Madruga, Clemens Ritter, David Ávila-Brande, Oscar Fabelo, and Regino Sáez-Puche. "Synthesis, structures and magnetic properties of the dimorphic Mn2CrSbO6oxide." Dalton Transactions 44, no. 23 (2015): 10665–72. http://dx.doi.org/10.1039/c4dt03849e.

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Mn<sub>2</sub>CrSbO<sub>6</sub>-perovskite was synthesized at high pressure in order to stabilize the small Mn<sup>2+</sup>cations on the A-perovskite site. Mn<sub>2</sub>CrSbO<sub>6</sub>-ilmenite polymorph can be prepared, starting from the perovskite, by a “hard-soft” phase transformation increasing the temperature at room pressure.

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19

Wu, Yi, Chuan Qiang Yin, Zheng Guang Zou, Xiao Min Li, Yu Fang Shen, and Lang Zhou. "Steel-Bonded Cemented Carbide GT35 by In Situ Reduction of Natural Ilmenite." Key Engineering Materials 336-338 (April 2007): 1390–93. http://dx.doi.org/10.4028/www.scientific.net/kem.336-338.1390.

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Steel-bonded cemented carbide GT35 was fabricated from natural ilmenite by in-situ synthesis and vacuum pressureless sintering. The thermodynamics of the synthesis process were analyzed. The results indicated that the stable phases were TiC and iron in the FeTiO3-C system. During the synthesis process, ilmenite was reduced by graphite via a series of titanium oxides to obtain hard phase (TiC) and the steel matrix as the ultimate products. The experimental results shown that GT35 had a reasonable phase composition and fine TiC particles embedded uniformly in the steel matrixes. The composites e

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20

Popovich, A. A., V. N. Vasilenko, and V. P. Reva. "Formation of the phase composition of tungstenless hard alloy powder with mechanochemical synthesis." Soviet Powder Metallurgy and Metal Ceramics 31, no. 11 (1992): 920–22. http://dx.doi.org/10.1007/bf00797615.

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21

Tang, Weiming, Richard J. Farris, William J. MacKnight, and Claus D. Eisenbach. "Segmented Polyurethane Elastomers with Liquid Crystalline Hard Segments. 1. Synthesis and Phase Behavior." Macromolecules 27, no. 10 (1994): 2814–19. http://dx.doi.org/10.1021/ma00088a023.

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22

Grass, Robert N., Stavros Tsantilis, and Sotiris E. Pratsinis. "Design of high-temperature, gas-phase synthesis of hard or soft TiO2 agglomerates." AIChE Journal 52, no. 4 (2006): 1318–25. http://dx.doi.org/10.1002/aic.10739.

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23

Baker, Paul, Shane Catledge, Sumner Harris, et al. "Computational Predictions and Microwave Plasma Synthesis of Superhard Boron-Carbon Materials." Materials 11, no. 8 (2018): 1279. http://dx.doi.org/10.3390/ma11081279.

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Superhard boron-carbon materials are of prime interest due to their non-oxidizing properties at high temperatures compared to diamond-based materials and their non-reactivity with ferrous metals under extreme conditions. In this work, evolutionary algorithms combined with density functional theory have been utilized to predict stable structures and properties for the boron-carbon system, including the elusive superhard BC5 compound. We report on the microwave plasma chemical vapor deposition on a silicon substrate of a series of composite materials containing amorphous boron-doped graphitic ca

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24

Jose, Subin Antony, Merbin John, and Pradeep L. Menezes. "Cermet Systems: Synthesis, Properties, and Applications." Ceramics 5, no. 2 (2022): 210–36. http://dx.doi.org/10.3390/ceramics5020018.

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Cermet is an advanced class of material consisting of a hard ceramic phase along with a metallic binding phase with the combined advantages of both the ceramic and the metal phase. The superior properties of this class of materials are particularly useful in high-temperature, tribological, and machining applications. This review paper seeks to provide a comprehensive overview of the various cermet systems. More specifically, the most commonly used cermet systems based on tungsten carbide (WC), titanium carbide (TiC), titanium carbonitride (TiCN), and aluminum oxide (Al2O3) are discussed based

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25

Chen, Xiao Dong, Tie Jun Ma, Hai Zhang, and Rong Sheng Chen. "Synthesis and Characterization of Novel Segmented Castable Polyurethanes Based on 2,4-TDI and 3,5-DMTDA." Applied Mechanics and Materials 29-32 (August 2010): 675–81. http://dx.doi.org/10.4028/www.scientific.net/amm.29-32.675.

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A series of three castable polyurethane elastomers were prepared from 2,4- toluene diisocyanate (TDI) and 3,5-dimethyl-thioltoluenediamine (DMTDA) chain extender, with polyethylene adipate (PEA), polyoxytetramethylene glycol (PTMG) and polycaprolactone (PCL) soft segments. The polyol molecular weight employed was 2000g/mol. The polyurethane elastomers were characterized by an electronmechanical universal testing machine, a LX-A Shore durometer and a Dynamic Mechanical analyzer (DMA). In addition, fractured surface of the polyurethane elastomers was investigated by a field emission scanning ele

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Shen, Wei Hua. "Hard Template Route for Synthesis of Mesoporous Spinel Type Oxides with Ordered Structure." Advanced Materials Research 886 (January 2014): 200–203. http://dx.doi.org/10.4028/www.scientific.net/amr.886.200.

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The binary mesoporous spinel oxides with high surface area have been synthesized by using KIT-6 and SBA-15 as hard templates and hydrated nitrated salts as precursors. Low temperature such as 500 °C is suitable for preparation of NiCo2O4with spinel phase. High temperature such as 800 °C is necessary for preparation of NiMn2O4, MnCo2O4, and (Co0.5Mn0.5)3O4with pure spinel phase. The prepared mesoporous spinel shows high surface area as 43-105 m2/g with pore volume as0.095-0.233 cm3/g. It is preferred to form mesoporous NiCo2O4with spherical particles.

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27

Patsidis, Anastasios C., Aikaterini Sanida, Georgia C. Manika, et al. "Synthesis of Magnetic Nanoparticle/Polymer Matrix Nanocomposites with Induced Magnetic Performance." Polymers 17, no. 14 (2025): 1913. https://doi.org/10.3390/polym17141913.

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In this work magnetic nanoparticles (Fe3O4, or ZnFe2O4, or SrFe12O19) and BaTiO3 microparticles were embedded in an epoxy resin for the synthesis of three series of hybrid magnetic polymer nanocomposites. Barium titanate content was kept constant, while magnetic phase content was varied. Fabricated specimens were structurally and morphologically characterized by employing scanning electron microscopy images and X-ray diffraction patterns. Results implied successful synthesis of the hybrid nanocomposites. The magnetic behavior of the pure magnetic nanoparticles and the fabricated nanocomposites

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Smetanina, K. E., P. V. Andreev, E. A. Lantsev, M. M. Vostokov, and N. V. Malekhonova. "X-ray diffraction layer-by-layer analysis of tungsten carbide-based hard alloys." Industrial laboratory. Diagnostics of materials 86, no. 8 (2020): 38–42. http://dx.doi.org/10.26896/1028-6861-2020-86-8-38-42.

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Improvement of the physical and mechanical properties of hard alloys based on WC – Co widely used in manufacturing of structural and tool products nowadays results from the use of novel technologies providing formation of a homogeneous high-density structures. Slight deviations of the carbon content from the equilibrium state lead to the formation of brittle η-phases (in particular, Co3W3C) and, accordingly, to deterioration of the mechanical properties of the product. We present the results of studying the homogeneity of the phase composition of the samples of hard alloys WC + 10% Co, obtaine

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Xu, Tao, Aolin Li, Shanshan Wang, Yinlong Tan, and Xiang’ai Cheng. "Phase-Controllable Chemical Vapor Deposition Synthesis of Atomically Thin MoTe2." Nanomaterials 12, no. 23 (2022): 4133. http://dx.doi.org/10.3390/nano12234133.

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Two-dimensional (2D) molybdenum telluride (MoTe2) is attracting increasing attention for its potential applications in electronic, optoelectronic, photonic and catalytic fields, owing to the unique band structures of both stable 2H phase and 1T′ phase. However, the direct growth of high-quality atomically thin MoTe2 with the controllable proportion of 2H and 1T′ phase seems hard due to easy phase transformation since the potential barrier between the two phases is extremely small. Herein, we report a strategy of the phase-controllable chemical vapor deposition (CVD) synthesis for few-layer (&l

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Terlikbaeva, A. Zh, A. M. Alimzhanova, R. A. Shayakhmetova, et al. "Obtaining fine-grained hard alloys homogeneous in carbide grain." Engineering Journal of Satbayev University 145, no. 3 (2023): 12–18. http://dx.doi.org/10.51301/ejsu.2023.i3.02.

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The actual task of this work is to obtain homogeneous hard alloys with fine carbide grains, combining high hardness and strength. Studies were carried out to establish the most favorable phase compositions of hard alloys and the most rational technical methodology for their production. In this research work, a nanostructured WC-TiC-Co powder charge was obtained by mechanochemical synthesis. Nanosized WC powder and nanopowder with precipitated Co were added to the hard alloy charge by mixing in a ball planetary mill. The process of pressing the powder charge at a pressure of 100-1000 MPa, as we

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SUN, LU, HAO CHEN, and BO LIU. "SURFACE MODIFICATIONS WITH LASER SYNTHESIZED Mo MODIFIED COATING." Surface Review and Letters 20, no. 01 (2013): 1350003. http://dx.doi.org/10.1142/s0218625x13500030.

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Mg–Cu–Al was first used to improve the surface performance of TA15 titanium alloys by means of laser cladding technique. The synthesis of hard composite coating on TA15 titanium alloy by laser cladding of Mg–Cu–Al–B4C/Mo pre-placed powders was investigated by means of scanning electron microscope, energy dispersive spectrometer and high resolution transmission electron microscope. Experimental results indicated that such composite coating mainly consisted of TiB2 , TiB , TiC , Ti3Al and AlCuMg . Compared with TA15 alloy substrate, an improvement of wear resistance was observed for this composi

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Wang, Y. G., Di Zhang, and Ming Chen. "Development of Coating Material by In Situ Reaction Synthesis." Key Engineering Materials 353-358 (September 2007): 1696–99. http://dx.doi.org/10.4028/www.scientific.net/kem.353-358.1696.

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A type of wear resistance coating material composed by ternary-boride-based (TBB) cermet coating and steel 65Mn substrate has been developed successfully by in-situ reaction synthesis. The TBB cermet coating has been formed by the in-situ reactions among the mixed raw metal powders during the process of casting. Microstructure has been studied using X-Ray Diffraction (XRD) and scanning electron microscopy (SEM). Results show that the main composition of the coating is ternary boride base hard phase Mo2FeB2 and ferrous base binder phase α-Fe, both of them distribute uniformly in the coating. Th

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Rasli @ Rosli, Nur Athirah, and Syazana Ahmad Zubir. "Synthesis and Characterization of Palm Kernel Oil Polyol Based Shape Memory Polyurethane: Effect of Different Diisocyanates." Key Engineering Materials 908 (January 28, 2022): 14–19. http://dx.doi.org/10.4028/p-l49hs4.

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Shape memory polyurethane (SMPU) is a very versatile material that has a broad array of applications. The selection of soft segments and hard segments play critical roles in determining the structure-property behaviors of SMPU. This research was conducted to evaluate the role of distinct types of diisocyanate on the final properties of polyurethane (PU). Palm kernel oil polyol (PKO) based PU were produced by using two-step bulk polymerization method with variations of diisocyanates. Isophorone diisocyanate (IPDI), 4,4-methylenebis (cyclohexyl isocyanate) (HMDI) and hexamethylene diisocyanate (

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Kuzyura, Anastasia, Tatiana Setkova, Dmitriy Chareev, et al. "Experimental Methods of Synthesis of Nano-/Macro Mineral Materials." Advanced Materials Research 650 (January 2013): 308–13. http://dx.doi.org/10.4028/www.scientific.net/amr.650.308.

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This work is devoted to development of synthesis methods of nano- and macrofunctional materials for industry, electronics, and modern science and technology. The authors have developed advanced methods of obtaining various carbon, silicate and chalcogenide materials by melt and hydrothermal methods with using of optimized chemical and thermodynamic parameters of synthesis. As a result a new super hard material - carbonate-synthetic diamond polycrystals were obtained. Nanodiamonds were synthesized by direct conversion of graphite into diamond. New species of macro- and fine crystalline piezoele

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35

Guan, Haitao, and Yan Hu. "A far-field super-resolution imaging method based on phase constructive." Journal of Physics: Conference Series 2478, no. 6 (2023): 062014. http://dx.doi.org/10.1088/1742-6596/2478/6/062014.

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Abstract Super-resolution imaging under passive illumination is always a crucial issue to be addressed. Because the wavefront of an incoherent light field is not easily detected, it is hard to achieve super-resolution imaging by synthetic aperture under passive illumination. In this work, we proposed a super-resolution method based on phase constructive. We use a quadrature phase-shifting algorithm to retrieve the wavefront from a series of correlation patterns and reconstruct the super-resolution image with a wavefront synthesis algorithm. A simulation result verifies the effectiveness of our

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Haq, Muhammad Aneeq, Han-Saem Lee, Mi Hye Lee, et al. "Nd2Fe14B/FeCo Core–Shell Nanoparticle Synthesis Using Galvanic Substitution Based Electroless Plating." Coatings 12, no. 3 (2022): 389. http://dx.doi.org/10.3390/coatings12030389.

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Core–shell structured magnetic nanoparticles combine hard and soft phases to improve energy efficiency. The mutual interaction of the two phases can lead to the exchange spring effect, leading to higher magnetic energy. In this regard, synthesis of Nd2Fe14B-based core–shell-structured powders have proven to be elusive, due to the relatively reactive nature of this phase. In this study, a process has been established for successfully coating the surface of Nd2Fe14B powders with a FeCo layer using the galvanic displacement method. Initially, a binary phase magnetic powder was synthesized contain

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Chkhartishvili, Levan, Levan Antashvili, Lasha Dalakishvili, Roin Chedia, Otar Tsagareishvili, and Archil Mikeladze. "On Modeling of Synthesis Process of Boron Carbide Based Nanocomposites." Condensed Matter 6, no. 1 (2021): 3. http://dx.doi.org/10.3390/condmat6010003.

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Nanocomposites based on boron carbide B4C are hard materials with wide field of applications in modern technologies. A system of first-order ordinary differential equations that simulates the process of chemical synthesis of nanopowders of B4C–TiB2 compositions containing titanium diboride (TiB2) as an additional phase is suggested and resolved numerically for a typical ratio of reaction constants. Reagents and products concentrations are found as time-functions. In this way, the optimal route of production technology of boron carbide-based nanomaterials can be identified.

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Jadhav, Abhijit P., Abid Hussain, Jae Ho Lee, Youn Kyung Baek, Chul Jin Choi та Young Soo Kang. "One pot synthesis of hard phase Nd2Fe14B nanoparticles and Nd2Fe14B/α-Fe nanocomposite magnetic materials". New Journal of Chemistry 36, № 11 (2012): 2405. http://dx.doi.org/10.1039/c2nj40620a.

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Li, Yang, Ming Xian Liu, Li Hua Gan, et al. "Double Templating Synthesis and Electrochemical Properties of Carbon Foams." Advanced Materials Research 347-353 (October 2011): 3400–3403. http://dx.doi.org/10.4028/www.scientific.net/amr.347-353.3400.

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In this paper, we demonstrated the synthesis and electrochemical properties of carbon foams for use as supercapacitor electrode materials. Carbon foams were prepared by double templating method in which emulsion and nanosilica were used as soft template and hard template, respectively. By using Span 80 and Tween 80 as emulsifiers, resorcinol/formaldehyde aqueous solution which contained nanosilica as aqueous phase and 1iquid paraffin as oil phase, an O/W emulsion was obtained. Carbon foams were obtained by emulsion polymerization, carbonization and the subsequent removal of the hard template.

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Kalisz, Grzegorz, Ewa Grzanka, Dariusz Wasik, et al. "Fabrication and Physical Properties of SiC-GaAs Nano-Composites." Solid State Phenomena 114 (July 2006): 297–302. http://dx.doi.org/10.4028/www.scientific.net/ssp.114.297.

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Nano-composites consisting of a primary matrix phase of hard nanocrystalline SiC and a secondary nanocrystalline GaAs semiconductor phase were obtained by high-pressure zone infiltration. The synthesis occurs in three stages: (i) at room- temperature the SiC nanopowder is compacted under high pressure to 8 GPa, (ii) the temperature is increased to 1240°C, above the melting point of GaAs, and the pores were filled with liquid, (iii) on cooling GaAs nanocrystallites grow in the pores. The synthesis was performed using a toroid-type high-pressure apparatus (IHPP PAS, Warsaw) and a six anvil cubic

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Niu, Jin Long. "Hydrothermal Synthesis of Nano-Crystalline Hydroxyapatite." Key Engineering Materials 330-332 (February 2007): 247–50. http://dx.doi.org/10.4028/www.scientific.net/kem.330-332.247.

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Natural biological hard tissues are nanocomposites of proteins and calcium hydroxyapatite (HAp) with superior strength and bioresorbabilities. Nanometer scale hyroxyapatite is the key material to manufacture bioresorbable bone substitute. An attempt was conducted to synthesis nano-crystalline hydroxyapatite with a hydrothermal chemical method. The prepared nano-crystalline HAp was characterized for its phase purity and nanoscale morphological structure by XRD, TEM and FTIR. The obtained results indicated that hydrothermal synthesized nano-crystalline HAp was pure single phased HAp with a diame

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Maletaskic, Jelena, Bratislav Todorovic, Martina Gilic, et al. "Synthesis and characterization of monophase CaO-TiO2-SiO2 (sphene) based glass-ceramics." Science of Sintering 52, no. 1 (2020): 41–52. http://dx.doi.org/10.2298/sos2001041m.

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Sphene based glass-ceramics (CaTiSiO5), an excellent candidate for a host lattice of ceramic materials and for nuclear waste immobilization, has been prepared from a powder mixture of CaCO3, TiO2 and SiO2 using vibro-milling for homogenization. Starting powders were melted at 1400?C for 2 h, cooled to room temperature, grounded again, then crystallized by thermal treatment yielding a sphene glass-ceramic. The evolution of the phase composition during thermal treatment was investigated by X-ray powder diffraction (XRPD), FT-IR, Raman and thermal analyses (TG-DTA). Pure synthetic single phase sp

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Pokropivny, A., A. Smolyar, P. Sylenko, et al. "SUPERCRITICAL FLUID SYNTHESIS OF C-BN AND POLYMORPHES OF BORON NITRIDE FROM GRAPHITE-LIKE PRECURSORS." SCIENTIFIC-DISCUSSION, no. 97 (February 14, 2025): 34–40. https://doi.org/10.5281/zenodo.14869521.

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Supercritical fluid synthesis of dense, intermediate and amorphous BN phases has been studied at pressures 50 and 200 MPa and temperature ~1000 <sup>0</sup>K from h-BN and t-BN as precursors and H<sub>2</sub>O and N<sub>2</sub> as fluids. According to the results of electron and X-ray diffractions, FTIR and hardness measurement, c-BN phase is proved to be the main synthesized phase with the level of transformation at least 20 %. Two different mechanisms of c-BN nanocrystals formation are proposed. Hardness values of synthesized crystals fill out all scale of hardness: ultrasoft, soft, normal a

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Jalabadze, Nikoloz, Lili Nadaraia, and Levan Khundadze. "SPS Method for Manufacturing Carbide Materials." Applied Mechanics and Materials 376 (August 2013): 38–41. http://dx.doi.org/10.4028/www.scientific.net/amm.376.38.

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Due the rapid heating rate combined with high pressure by the Spark Plasma Sintering (SPS) technologies possible manufacture a wide range of novel materials with exceptional properties that cannot be achieved using conventional sintering techniques. Hard metals are, from a technical point of view, one of the most successful composite materials. An overview of the metallurgical reactions during the SPS sintering process of powder mixtures for the manufacture of hard metals is presented. The relatively complex phase reactions in the multi-component system TiC-Mo-W-Ni are discussed. There were el

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Minaev, Y. A. "Diamond Like Structure Nano Carbonitrides Hardening of Hard Alloys Cutting Tools." Advanced Materials Research 428 (January 2012): 65–68. http://dx.doi.org/10.4028/www.scientific.net/amr.428.65.

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The fundamental property of solid crystalline materialsi.e.phenomena of first-order phase transition of grain boundaries with formation of two-dimensional liquid have been used for elaboration of the new technology. Nitriding type methods have been used to develop strategies for effective forming of coatings by synthesis of nitrides and carbonitrides on surface layers of hard metals. WC-Co and WC-TiC-Co hard metal tools have been used for experiments. Industrial tests indicated that the tools functional properties improved 2-9 times. The new tools demonstrated a high resistance to surface wear

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Lew, Kien Seng, Radzali Othman, and Fei Yee Yeoh. "Synthesis and Characterization of Mesoporous Hydroxyapatite." Advances in Science and Technology 63 (October 2010): 152–57. http://dx.doi.org/10.4028/www.scientific.net/ast.63.152.

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Among the porous media, hydroxyapatite (HA) possesses good biocompatibility and bioactivity properties with respect to bone cells and tissues, due to its similarity with the hard tissues of the body. In this study, mesoporous HA was synthesized using a soft-templating technique via a self-assembly between HA and cationic surfactant decyltrimethylammonium bromide (C10TAB), which is analogous to the synthesis of mesoporous silica MCM-41. This co-precipitation method involved formation of hexagonal-phase micelle template by the surfactant and the precipitation of HA surrounding the micelle. After

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Nguyen, Tien Anh, Thanh Le Pham, Irina Yakovlevna Mittova, et al. "Co-Doped NdFeO3 Nanoparticles: Synthesis, Optical, and Magnetic Properties Study." Nanomaterials 11, no. 4 (2021): 937. http://dx.doi.org/10.3390/nano11040937.

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In this work, single-phase nanostructured NdFe1−xCoxO3 (x = 0, 0.1, 0.2, and 0.3) perovskite materials were obtained by annealing stoichiochemistry mixtures of their component hydroxides at 750 °C for 60 min. The partial substitution of Fe by Co in the NdFeO3 crystal lattice leads to significant changes in the structural characteristics, and as a consequence, also alters both the magnetic and optical properties of the resulting perovskites. The low optical band gap (Eg = 2.06 ÷ 1.46 eV) and high coercivity (Hc = 136.76 ÷ 416.06 Oe) give Co-doped NdFeO3 nanoparticles a huge advantage for applic

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Costa, G. C. C. da, and R. Muccillo. "Synthesis of Lanthanum Beta Alumina by the Polymeric Precursor Technique." Materials Science Forum 530-531 (November 2006): 649–54. http://dx.doi.org/10.4028/www.scientific.net/msf.530-531.649.

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Lanthanum beta alumina powders were obtained by the polymeric precursor technique using lanthanum nitrate, aluminum nitrate, ethylene glycol and citric acid. The transformations that occur during thermal treatment of the precursor solution were evaluated by thermogravimetric and differential thermal analysis. Fourier Transform Infrared analysis for residual carbon qualitative detection and gas adsorption analysis for evaluating specific surface area, BET method, were carried out in powder specimens heat treated at different temperatures. High calcination temperature leads to the formation of h

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Kawamura, Yasuhiko, Yasuyuki Akai, and Masao Tsukayama. "Combinatorial Synthesis of Exohedrally Modified Fullerene Derivatives." International Journal of Modern Physics B 17, no. 08n09 (2003): 1910–15. http://dx.doi.org/10.1142/s0217979203019861.

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Fulleropyrrolidines have been very welcomed in a community of a fullerene science. But sometimes the synthesis ends up with disappointing yields of the products. In order to overcome the problem and to explore more environmentally benign method for synthesizing fullerene derivatives having various attachment on the surface of the fullerenes, a solid-phase synthesis is examined. We found that the dipolar cycloaddition of an azomethine ylide, i.e., 2-phenyl-N-benzylideneglycine methyl ester, supported on a Wang resin, proceeded feasibly with C 60 and the objective fulleropyrrolidines were afford

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Pei, Yuzhe. "Synthesis Of Nano-Porous Strontium Titanate Materials for Photocatalysis." Highlights in Science, Engineering and Technology 96 (May 5, 2024): 220–26. http://dx.doi.org/10.54097/m5a1kf92.

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Strontium titanate semiconductor materials have been widely used in the field of photocatalysis due to their high dielectric constant and band gap. Uniform, micron-sized SrTiO3 particles didn’t tend to aggregate, and the low surface area of larger particles could be improved by incorporating porous structures, thus offering superior performance for a range of applications. In this study, six mainly methods to prepare nano-porous SrTiO3 particles were showed and discussed. The methods include hydrothermal method，sol gel method, chemical co-precipitation method, high temperature solid phase meth

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