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Статті в журналах з теми "Ni/Al2O3 composite"

Автор: Grafiati
Опубліковано: 7 червня 2025
Оновлено: 2 серпня 2025

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1

Zygmuntowicz, Justyna, Katarzyna Konopka, Marek Krasnowski, et al. "Characterization of Al2O3 Matrix Composites Fabricated via the Slip Casting Method Using NiAl-Al2O3 Composite Powder." Materials 15, no. 8 (2022): 2920. http://dx.doi.org/10.3390/ma15082920.

Повний текст джерела
Анотація:
This work aimed to characterize Al2O3 matrix composites fabricated by the slip casting method using NiAl-Al2O3 composite powder as the initial powder. The composite powder, consisting of NiAl + 30 wt.% Al2O3, was obtained by mechanical alloying of Al2O3, Al, and Ni powders. The composite powder was added to the Al2O3 powder to prepare the final powder for the slip casting method. The stained composite samples presented high density. EDX and XRD analyses showed that the sintering process of the samples in an air atmosphere caused the formation of the NiAl2O4 spinel phase. Finally, the phase com
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2

Zhang, Hui, Yong Wei Song, and Zhen Lun Song. "Electrodeposited Ni/Al2O3 Composite Coating on NdFeB Permanent Magnets." Key Engineering Materials 373-374 (March 2008): 232–35. http://dx.doi.org/10.4028/www.scientific.net/kem.373-374.232.

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Анотація:
NdFeB permanent magnets are highly susceptible to corrosion in various environments. A new composite coating electrodeposited on NdFeB magnets was investigated in this paper. The Ni matrix film was firstly electrodeposited on NdFeB surface from watts nickel electrolyte, and then Ni/Al2O3 composite coating was successively electrodeposited on the Ni film. The microstructures of electrodeposited Ni coating and Ni/Al2O3 composite coating were observed by scanning electron microscopy (SEM). The corrosion behavior of Ni coating and Ni/Al2O3 composite coating in 3.5wt% NaC1 solution was studied by p
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3

Feng, Chao, Yi Xie та Zhong Wu. "Friction and Wear Properties of α-Al2O3-Coated SiC Particle Reinforced Nickel Matrix Composites Sliding against Bearing Steel". Solid State Phenomena 266 (жовтень 2017): 155–64. http://dx.doi.org/10.4028/www.scientific.net/ssp.266.155.

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Анотація:
In this study, attempt has been made to investigate the effect of SiC particles on the friction and wear properties of Ni/SiC composites manufactured by electrodeposition, especially for the composites with high-temperature treatment.For this purpose, α-Al2O3 was coated on the surfaces of SiC particles by sol-gel technology to inhibit interfacial reaction of SiC and nickel at high temperature. Both of the Ni/α-Al2O3-coated SiC (Ni/CSp) and Ni/uncoated SiC (Ni/UCSp) composites were treated at 600 °C to study the resulting wear behaviour. The results indicated that with heat treatment at 600 °C,
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4

Lu, Jian Hua, Wan Chang Sun, Ming Zhu, Ming Feng Tan, and Quan Zhou. "Effects of Content of Al2O3 Particles and Heat Treatment on Corrosion Resistance of Ni-P-Al2O3 Composite Coatings." Advanced Materials Research 105-106 (April 2010): 441–43. http://dx.doi.org/10.4028/www.scientific.net/amr.105-106.441.

Повний текст джерела
Анотація:
Ni-P-Al2O3 composite coatings with the uniform distribution of Al2O3 particles were prepared by adding Al2O3 particles into Ni-P plating solution and adopting optimum plating process. The morphology and microstructure of the coatings were investigated by using SEM, EDS and XRD. Being immersed in 10 vol.% H2SO4 solutions, the corrosion resistance of Ni-P-Al2O3 composite coatings was tested. The results show that when the solubility of Al2O3 particles in plating solution is 8 g/l, the corrosion resistance is best. Comparing with as-plated Ni-P-Al2O3 composite coatings, the corrosion resistance o
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5

Yang, Hua, Shi Yun Dong, and Bin Shi Xu. "Microstructure and Properties of Brush Electroplated Nano-SiC-Al2O3/Ni Composite Coating." Key Engineering Materials 373-374 (March 2008): 285–88. http://dx.doi.org/10.4028/www.scientific.net/kem.373-374.285.

Повний текст джерела
Анотація:
This paper investigated the effect of nano-SiC particle on microstructure and properties of brush electroplated nano-Al2O3/Ni composite coating. Three kinds of coatings, such as pure nickel coating, nano-Al2O3/Ni composite coating and nano-SiC-Al2O3/Ni composite coating, were fabricated on 1045 steel substrate. Before deposited, Zeta potential of nano-particles in the solution was examined. The results show Zeta potential of the nanoparticles in the nano-Al2O3/Ni electrolyte is negative, but that of the nanoparticles in nano-SiC-Al2O3/Ni electrolyte is positive when the pH value of electrolyte
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6

Kim, Hyeong-Chul, and Jae-Kil Han. "Microstructure and Mechanical Property of Hot-Pressed Al2O3-Ni-P Composites Using Ni-P-Coated Al2O3Powders." Advances in Materials Science and Engineering 2015 (2015): 1–6. http://dx.doi.org/10.1155/2015/148657.

Повний текст джерела
Анотація:
Al2O3-Ni-P composite powders with Ni-P contents of 10.9, 14.4, and 20.4 wt.% were synthesized via the Ni-P electroless deposition process. The as-received Al2O3-Ni-P composite powders were composed of Ni-P particles and Ni-P coating layer. Some Ni-P particles randomly adhered to the Al2O3powders, and their particle diameter ranged from 5 nm to 20 nm. The thin Ni-P layer had about 5 nm thick amorphous structure and directly bonded with Al2O3powders. Using the Ni-P-coated Al2O3powders, a dense Al2O3-Ni-P composite can be successfully obtained using the hot press process at 1,350°C for 1 hour in
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7

Sun, Wan Chang, Ming Feng Tan, Jian Hua Lu, Lei Zhang, and Quan Zhou. "Corrosion and Oxidation Resistance of Electroless Ni-P-Al2O3 Composite Coatings on Carbon Steel." Applied Mechanics and Materials 34-35 (October 2010): 831–35. http://dx.doi.org/10.4028/www.scientific.net/amm.34-35.831.

Повний текст джерела
Анотація:
Electroless Ni-P and Ni-P-Al2O3 composite coatings on low carbon steel (Q235) sheets were prepared by adopting optimum plating process. The cross-section morphology and structure as well as the phase transformation of the composite coatings were studied by scanning electron microscopy(SEM), X-ray diffraction(XRD). It was shown that the Al2O3 particles homogeneously dispersed in the entire Ni-P film matrix, and the structure of Ni-P-Al2O3 composite coatings as deposited was amorphous. The corrosion behaviors were evaluated by electrochemical tests. The experimental results indicated that the co
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8

Liu, Lu Hao, Zhi Wang, Guo Pu Shi, Yan Ma, Shu Ai Feng, and Chao Wu. "Effect of Fiber Coating on Properties of Ni-MF/Al2O3 Composites." Key Engineering Materials 575-576 (September 2013): 398–401. http://dx.doi.org/10.4028/www.scientific.net/kem.575-576.398.

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Анотація:
By adding sintering additives (CMS and nanoTiO2), Ni-MF/Al2O3 composites were prepared by pressureless sintering. In order to ameliorate the combination between mullite fiber and alumina matrix, mullite fiber surface was coated with Al2O3 coating. To improve the property of alumina ceramic composite, Ni particles were chosen as toughening phase. For the preparation of composite, the optimum process was 10% MF, 13% Ni, and sintering temperature in 1400°C. The material performance can be effectively improved.
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9

Feng, Qiu Yuan, Ting Ju Li, Hong Yun Yue, Fu Dong Bai, Kai Qi, and Jun Ze Jin. "Sediment Co-Deposition of Nanostructured Ni-Al2O3 Composite Coatings." Key Engineering Materials 373-374 (March 2008): 244–47. http://dx.doi.org/10.4028/www.scientific.net/kem.373-374.244.

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Анотація:
Nanostructured Ni-Al2O3 composite coatings incorporated with various contents of α-Al2O3 nano-particles were prepared on mild steel by using novel sediment co-deposition (SCD) technique. For the comparison reason, the pure Nickel coating and the Ni-Al2O3 composite coatings were fabricated by means of conventional electroplating (CEP) technique. The electroplating was carried out in Watt’s bath without any additives except for nano-α-Al2O3 suspension. The influence of the nano-particulates concentration, current density, and the mode of electroplating on the composite coatings were investigated
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10

Xing, Guo Hong, Zhi Wang, Jian Fei Liu, and Guo Pu Shi. "Fabrication of Ni-MF/Al2O3 Ceramic Composites." Advanced Materials Research 79-82 (August 2009): 751–54. http://dx.doi.org/10.4028/www.scientific.net/amr.79-82.751.

Повний текст джерела
Анотація:
Ni-MF/Al2O3 composite was fabricated using traditional method. The specimens covered with graphite were sintered at 1400°C, and the microstructure and mechanical properties of Ni-MF/Al2O3 composites were studied. Results showed that the flexural strength and fracture toughness of the composites were dramatically changed with the content of nickel. When the content of Ni was 15 wt% and no-coated MF was 10%, the composite obtained better mechanical properties, its flexural strength and fracture toughness were up to 734.40 MPa and 10.17 MPa•m1/2 respectively. The toughening mechanisms of the comp
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11

Besisa, D. H. A., Z. I. Zaki, A. M. M. Amin, Y. M. Z. Ahmed, and E. M. M. Ewais. "Influence of hardening additives on the characteristics of TiC‒Al2O3 ceramic composite tribological applications, obtained by SHS." NOVYE OGNEUPORY (NEW REFRACTORIES), no. 9 (October 25, 2020): 47–55. http://dx.doi.org/10.17073/1683-4518-2020-9-47-55.

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Анотація:
In attempts to attain a SHS synthesized TiC‒Al2O3 composite with high density, homogenous microstructure and extra mechanical properties for using in aggressive media, addition of different reinforcements have to be studied and inspected. In this work, ductile nickel metal powder with different content (5‒20 wt. %) and 1 mole fraction dilution of alumina and zirconia with and without Ni addition are introduced to TiC‒Al2O3 ceramic and synthesized by combined self-propagating high temperature synthesis (SHS) and direct consolidation (DC) technique. The influence of nickel wt. % and dilution wit
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12

Góral, A., W. Żórawski, M. Makrenek, and S. Kowalski. "Microstructure and properties of cold sprayed composite coatings." Journal of Achievements in Materials and Manufacturing Engineering 2, no. 81 (2017): 49–55. http://dx.doi.org/10.5604/01.3001.0010.2037.

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Анотація:
Purpose: The composite coatings containing incorporated ceramic achieve a wide spectrum of enhanced properties, resulting from a combination of features from a ductile matrix and hard particles. This article attempts to explain how the alumina addition to Ni powder influences the microstructure and mechanical properties of the composite Ni-Al2O3 coatings cold sprayed on the 7075 Al alloy. Design/methodology/approach: The coatings were formed during a deposition of the powder particles step by step which impacts with high velocities onto the substrate, deform, and adhere to it or to other parti
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13

Wang, Rong Guang, Hiroki Sawada, Nan Wang, and Jian Nie. "Preparation of Ni-P-Al2O3 Composite Film on Mild Steel with High Resistance to Corrosion and Wear." Materials Science Forum 750 (March 2013): 31–35. http://dx.doi.org/10.4028/www.scientific.net/msf.750.31.

Повний текст джерела
Анотація:
The Ni-P-Al2O3 composite film was coated on mild steel of SS400 with electroless plating method. In this process, different sizes of Al2O3 particles and different blended amounts of Al2O3 particles into the plating solution were applied. From the surface and cross section observation, it is known that the Al2O3 particles were uniformly dispersed in the Ni-P alloy. The highest corrosion resistance and the highest wear resistance of the Ni-P-Al2O3 composite film were obtained when adding Al2O3 particles with the mean diameter of 0.05μm into the plating solution at the blended amount of 1.0g/L.
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14

Chen, Huan Ming, Dong Yang, Xin Xin Lin, Yan Qing Wang, Ling Ma, and Ya Hong Gao. "Investigation on the Interfacial Bonding Strength between Ni-P-W/Al2O3 Composite Coatings and NdFeB Matrix." Applied Mechanics and Materials 217-219 (November 2012): 1359–62. http://dx.doi.org/10.4028/www.scientific.net/amm.217-219.1359.

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Анотація:
¹̄The Ni-P-W/Al2O3 composite coatings were deposited on the NdFeB magnetic materials surface by electroless plating method. The morphology of Ni-P-W/Al2O3 coatings was investigated using scanning electron microscopy. And the X-ray diffraction was used to identify the phase constituents. The interfacial bonding strength between Ni-P-W/Al2O3 composite coatings and NdFeB matrix was also tested. The results indicated that the interfacial bonding strength is prone to be increased while the Al2O3 powders co-deposited with Ni-P-W coatings. And the interfacial bonding strength would reach the highest
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15

Dawood, Nawal Mohammed. "Erosion-Corrosion Behavior of Al-20%Ni-Al2O3 Metal Matrix Composites by Stir Casting." Materials Science Forum 1002 (July 2020): 161–74. http://dx.doi.org/10.4028/www.scientific.net/msf.1002.161.

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Анотація:
Aluminium as matrix in particulars have been vastlys investigateds, this is becauses of the diverses applicationss of aluminium dues to its exceptional propertiess. Material scientistss alwayss face a challenges when it comess to the tribologicals and mechanicals propertiess of aluminium, as it exudess rather poors behaviours in these aspectss. Hences this works aims to improves the mechanicals and corrosives resistances of Aluminiums by reinforcings with aluminum oxides and Nickel throughs stir casting usings vortex techniques. Al-Ni-Al2O3 composites with percentages of Ni fixed at 20 % and A
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16

Daniel, Shetha, Nilotpal Banerjee, Manik Majumder, and Sudhir Chitrapady Vishweshwara. "Effect of Mg on Al-Mg Alloy and Electroless Ni-P Codeposition of nano-Al2O3: Mechanical, Wear, and Corrosion Resistance Properties." Trends in Sciences 20, no. 10 (2023): 6793. http://dx.doi.org/10.48048/tis.2023.6793.

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Анотація:
The addition of magnesium to Aluminum alloys has become increasingly popular due to their lightweight, high strength, and corrosion resistance properties. Our research on high-content Mg doped 90, Al-10 wt% Mg alloy has shown that coating it with electroless Ni-P and codepositing nano-Al2O3 (0, 2.5, 5 and 7.5 wt%) can significantly improve its mechanical properties, resistance to wear & tear, and even corrosion resistance. The electroless Ni-P-5 wt% Al2O3 composite displayed a wear rate of 0.65×10−3 g/m at 12 N, a microhardness value of 598 HV, and remarkable thermal shock resistance. A st
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17

Qu, Zhi Xue, Qun Wang, Bin Pang, Xue Cheng Hou, and Wei Pan. "Preparation and Electromagnetic Properties of Al2O3/Ni Composites." Key Engineering Materials 602-603 (March 2014): 926–30. http://dx.doi.org/10.4028/www.scientific.net/kem.602-603.926.

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Анотація:
In this paper, a series of Al2O3/Ni composites with various content of Ni (0 vol%, 10 vol%, 20 vol%, 30 vol%, 40 vol% and 50 vol%) were prepared, and the effect of the methods and compositions on the density and electromagnetic properties was investigated. The results show that the density of the composites increases with the increasing sintering temperature as well as the increasing content of Ni. Moreover, the dielectric constant of the composites increases remarkably with the sintering temperature and the content of Ni, while the permeability shows an almost linear enhancement with the incr
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18

Tuan, Wei-Hsing, and Rong-Zhi Chen. "Interactions between toughening mechanisms: Transformation toughening versus plastic deformation." Journal of Materials Research 17, no. 11 (2002): 2921–28. http://dx.doi.org/10.1557/jmr.2002.0423.

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Анотація:
In this study, the interactions between transformation toughening and plastic stretching were investigated experimentally. Zirconia and metals, nickel or silver, were incorporated simultaneously into an alumina matrix. The extent of phase transformation of zirconia particles was enhanced due to the coexistence of soft metals. The ductility of nickel was also enhanced in the Al2O3–Ni–ZrO2 composites. However, the presence of zirconia particles at the alumina/silver interface reduced the ability of silver to deform plastically. Due to the interactions, the ratio of composite toughness to matrix
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19

HUANG, ZHONG-JIA, and DANG-SHENG XIONG. "DEPENDENCE OF CORROSION BEHAVIOR OF Ni–MoS2/Al2O3 COATINGS IN RELATION TO THE Al2O3 RATIO IN MoS2/Al2O3 PARTICLES." Surface Review and Letters 16, no. 03 (2009): 455–62. http://dx.doi.org/10.1142/s0218625x09012858.

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Анотація:
The MoS 2 particles were coated with Al 2 O 3 ratio varying from 5 to 50 wt.% content. Ni – MoS 2/ Al 2 O 3 composite coatings were prepared by means of pulse electrodeposition. The dependence of preferential orientation index and corrosion properties of these composite coatings was investigated in relation to the Al 2 O 3 ratio in MoS 2/ Al 2 O 3 particles. Polarization measurements have been used to evaluate corrosion resistance performance of coating. The Ni – MoS 2/50 wt .% Al 2 O 3 coatings showed the highest corrosion resistance compared with Ni – MoS 2/5 wt .% Al 2 O 3, Ni – MoS 2/10 wt
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20

Konopka, Katarzyna, Marek Krasnowski, Justyna Zygmuntowicz, Konrad Cymerman, Marcin Wachowski, and Paulina Piotrkiewicz. "Characterization of Al2O3 Samples and NiAl–Al2O3 Composite Consolidated by Pulse Plasma Sintering." Materials 14, no. 12 (2021): 3398. http://dx.doi.org/10.3390/ma14123398.

Повний текст джерела
Анотація:
The paper describes an investigation of Al2O3 samples and NiAl–Al2O3 composites consolidated by pulse plasma sintering (PPS). In the experiment, several methods were used to determine the properties and microstructure of the raw Al2O3 powder, NiAl–Al2O3 powder after mechanical alloying, and samples obtained via the PPS. The microstructural investigation of the alumina and composite properties involves scanning electron microscopy (SEM) analysis and X-ray diffraction (XRD). The relative densities were investigated with helium pycnometer and Archimedes method measurements. Microhardness analysis
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21

Wang, Rong Guang, Hiroki Sawada, and Mitsuo Kido. "Corrosion and Wear Resistances of Ni-P-Al2O3 Composite Film Prepared by Electroless Plating." Materials Science Forum 654-656 (June 2010): 2767–70. http://dx.doi.org/10.4028/www.scientific.net/msf.654-656.2767.

Повний текст джерела
Анотація:
The electroless plating composite film Ni-P-Al2O3 was prepared on a mild steel of SS400 with stirring of the plating solution. The composite film became thinner and rougher when Al2O3 particles were blended into the plating solution. The corrosion resistance and the wear resistance of the composite film were largely enhanced in comparision to the Ni-P film.
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22

Jiang, Dong Mei, Ying Shen, Wei Jun Zhang, and Tie Jun Liu. "Deposition Mechanism and Wear Resistance Nano Ni-Al2O3 Composite Coatings." Applied Mechanics and Materials 281 (January 2013): 409–12. http://dx.doi.org/10.4028/www.scientific.net/amm.281.409.

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Анотація:
Nano Ni-Al2O3 composite coatings were prepared on pure copper substrate. The surface morphology and distribution of nano-particles of coatings were observed by SEM, the components of the coatings analyzed by X-ray diffractometer, and the microhardness of coatings tested by HXD-1000 microhardness tester. The microstructure of nano Ni-Al2O3 composite coating was different from that of the electrodeposited nickel coatings. The inserted Al2O3 particle can effectively hinder the growth of crystals. The microhardness of composite coatings around the inserted particles was much higher than that of el
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23

Sun, Wan Chang. "The Effect of Al2O3 Concentration on Properties of Ni-W-P-Al2O3 Electroless Composite Coating." Advanced Materials Research 468-471 (February 2012): 1163–66. http://dx.doi.org/10.4028/www.scientific.net/amr.468-471.1163.

Повний текст джерела
Анотація:
Ni-W-P-Al2O3 electroless composite coating was successfully co-deposited on 45 steel substrate using electroless plating. Optical microscope (OM), micro-hardness tester and potentiodynamic polarization were used to analyze the morphology, micro-hardness and corrosion resistance of the composite coating. The effect of Al2O3 concentration in the plating solution on the micro-hardness and corrosion resistance of the composite coating was mainly discussed. The results show that Al2O3 particles co-deposit with Ni-W-P homogeneously. The micro-hardness and corrosion resistance of the coating are impr
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24

Liu, Ping, Yongwei Zhu, Qi Shen, et al. "Surfactant-Free Electroless Codeposition of Ni–P–MoS2/Al2O3 Composite Coatings." Coatings 9, no. 2 (2019): 116. http://dx.doi.org/10.3390/coatings9020116.

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Анотація:
This paper presents the influence of an inorganic Al2O3 layer over MoS2 particles on the tribological performance of electroless Ni–P–MoS2/Al2O3 composite coatings fabricated without using surfactants. The Al2O3-coated MoS2 particles were prepared by a heterogeneous nucleation process. The dry sliding tests of the composite coatings were tested against a WC ball. SEM was used to observe the surface morphology of particles, composite coatings, and worn surfaces. The results indicate that the coverage of an Al2O3 coating on MoS2 particles significantly affects the surface morphology, frictional
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25

Opálek, Andrej, Marta Gaburjáková, Peter Švec, et al. "Impact of Al2O3 Particle Size on the Open Porosity of Ni/Al2O3 Composites Prepared by the Thermal Oxidation at Moderate Temperatures." Metals 11, no. 10 (2021): 1582. http://dx.doi.org/10.3390/met11101582.

Повний текст джерела
Анотація:
The performance of attractive Ni-based composites can be affected by changing their microstructures, e.g., introducing pores. Here, we report a novel, relatively low-cost process to fabricate Ni/Al2O3 composites with open porosity modified by the size of Al2O3 particles. The mixture of powders was subjected to thermal oxidation twice in air after a maximal temperature of 800 °C was reached in a stepwise manner and maintained for 120 min. The oxidation kinetics were determined thermogravimetrically. The open porosity was evaluated by an Archimedes’ principle-based method. Localization and quant
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26

Zygmuntowicz, Justyna, Paweł Falkowski, Marcin Wachowski, Aleksandra Miazga, Paulina Piotrkiewicz, and Waldemar Kaszuwara. "Microstructure and mechanical properties of Al2O3-Cu-Ni hybrid composites fabricated by slip casting." Processing and Application of Ceramics 14, no. 1 (2020): 1–8. http://dx.doi.org/10.2298/pac2001001z.

Повний текст джерела
Анотація:
This work focuses on developing the fabrication method of hybrid composites based on Al2O3-Cu system with the addition of nickel phase. The composites were prepared by slip casting and the slurries with a high concentration of solid content were used. The sintered composites were characterized by XRD, SEM and EDX. Selected physical proprieties, namely hardness, fracture toughness and bending strength were also determined. The microstructure and its influence on the mechanical properties were investigated. XRD analyses revealed that the obtained composites contained Al2O3, Ni, Cu and solid solu
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27

Yusmaniar, Yusmaniar, Agung Premono, Ferry Budhi Susetyo, and Sigit Dwi Yudanto. "Preparation, Characterization, and Photocatalytic Activity of Ni-Cd/Al2O3 Composite Catalyst." Bulletin of Chemical Reaction Engineering & Catalysis 18, no. 4 (2023): 627–39. http://dx.doi.org/10.9767/bcrec.20045.

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Анотація:
This study was conducted to determine the effect of the radiation source and radiation time on the methylene blue (MB) solution by adding Ni-Cd/Al2O3 to the percent degradation of MB. To investigate similar purposes, the pH of the MB solution varied as well. The preparation, characterization, and photocatalytic activity of Ni-Cd/Al2O3 are three steps in this research. The Ni-Cd was prepared by mixing Ni(NO3)2.6H2O and Cd(NO3)2.4H2O. Various concentrations of Ni-Cd were mixed with Al2O3, then heated, stirred, dried, and calcined to form Ni-Cd/Al2O3 powder. The dried powder catalysts were charac
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28

Wu, Gang, Ning Li, Derui Zhou, and Kurachi Mitsuo. "Electrodeposited Co–Ni–Al2O3 composite coatings." Surface and Coatings Technology 176, no. 2 (2004): 157–64. http://dx.doi.org/10.1016/s0257-8972(03)00739-4.

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29

Tey, Eydar, Mansor Hashim, and Ismayadi Ismail. "Characterization of Cu-Al2O3 and Ni-Al2O3 Nanocomposites Electrodeposited on Copper Substrate." Materials Science Forum 846 (March 2016): 471–78. http://dx.doi.org/10.4028/www.scientific.net/msf.846.471.

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Анотація:
In the present work, it was attempted to electrodeposit Cu-Al2O3 and Ni-Al2O3 metal matrix composite (MMC) coatings onto a copper substrate using a modified Watts bath containing dispersed nanosized Al2O3 with an average particle size of 50 nm. The prepared nanocomposite coatings were subjected to different tests to characterize their surface morphology, crystalline structure and mechanical properties. The microstructure and composition of the composite films were studied with Scanning Electron Microscopy (SEM) and X-Ray Diffraction (XRD) techniques. The use of nanoparticles could change the m
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30

Li, Y. J., X. W. Sun, J. W. Fan, et al. "Fabrication and Properties of Magnesium Matrix Composite Reinforced by Carbon Nanotubes-Alumina Hybrid Reinforcements." Advanced Composites Letters 26, no. 5 (2017): 096369351702600. http://dx.doi.org/10.1177/096369351702600503.

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Анотація:
Magnesium matrix composite reinforced by carbon nanotubes (CNTs)-Al2O3 hybrid reinforcements was successfully fabricated by a novel process. CNTs-Al2O3 in-situ mixture was synthesized by directly growing CNTs on Al2O3 particles acting as the carrier of Ni catalysts via chemical vapour deposition. The influences of Ni catalyst content on the morphology, structure and yield of CNTs were investigated. By powder metallurgy process, the CNTs-Al2O3 in-situ mixture was dispersed in Mg powder to fabricate the CNTs-Al2O3 synergistically reinforced Mg matrix composite. The performance test results showe
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31

Atiyah, Alaa Abdulhasan. "An Experimental Study of Sintered (Ni-Cr-xAl2O3) Composites." Metallurgical and Materials Engineering 22, no. 3 (2016): 165–78. http://dx.doi.org/10.30544/210.

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Анотація:
This paper deals with the (Ni-Cr- xAl2O3) metallic composites (MCCs). Restraining of of thermal expansion at adequate mechanical and corrosion properties is the main objective of this work. Composites are fabricated with four weight percentages of (x = 1, 2, 5 and 10% Al2O3). Compacting and sintering has accomplished at (636 MPa) and 1250oC for 7 hrs. All sintered compacts were examined for phases and microstructure featuring. Results have indicated, the incorporation of Al2O3 with the matrix is due to the efficient sintering conditions, that diminishing the grain growth and increasing the sof
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32

C, Chandrasekhara Sastry, N. Pradeep, A. M. Shaik, H. A. Rahman, and Sandeep Patil. "Experimental investigation of electrodeposited Ni-Al2O3/ZrO2 nano composite on HSLA ASTM A860 alloy." Surface Topography: Metrology and Properties 9, no. 4 (2021): 045028. http://dx.doi.org/10.1088/2051-672x/ac396a.

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Анотація:
Abstract Nano composite coatings on HSLA ASTM A860 alloy, adds to the barrier efficacy by increase in the microhardness, wear and corrosion resistance of the substrate material. Additionally, reduction of delamination of the nano composite coating sample is ascertained. Ball milling is availed to curtail the coating samples (Al2O3/ZrO2) to nano size, for forming a electrodeposited product on the substrate layer. The curtailment in grain size was ascertained to be 17.62% in Ni-Al2O3/ZrO2 nano composite coating. During the deposition process, due to the presence of Al2O3/ZrO2 nano particles an i
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33

Gu, Sidi, and Zhao Qiang Zeng. "Synthesis and Properties of Al2O3 Nanocomposite Ceramics Toughened by Nano Metallic Particles." Key Engineering Materials 280-283 (February 2007): 1099–102. http://dx.doi.org/10.4028/www.scientific.net/kem.280-283.1099.

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Анотація:
Al2O3/Ni composite ceramics toughened by metallic particles was fabricated by the vacuum reduction of Al2O3 and nickel nitrate (Ni(NO3)2•6H2O) mixed powders at 800-1000° for 2-4h and hot pressed at 1400° ~ 1500°C for 1-2h. Three-point bending strength and facture toughness of the composite were studied. With the increase of Ni content, its flexural strength and facture toughness increases significantly. Microstuctural investigations of the composite revealed that fine nickel particles dispersed homogeneously at the matrix grain boundaries, forming the intergranular nanocomposite.
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34

El-khatib, Samah, A. H. Elsayed, A. Y. Shash, and A. El-Habak. "Effect of Dispersions of Al2O3 on the Physical and Mechanical Properties of Pur ties of Pure Copper and Copper-Nick e Copper and Copper-Nickel Allo el Alloy." Future Engineering Journal 3, no. 1 (2022): 10–19. http://dx.doi.org/10.54623/fue.fej.3.1.2.

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Анотація:
This paper illustrates the mechanical and physical properties of pure Cu and Cu-Ni (50-50 wt. %) alloy mixed with Al2O3 (1-4 wt. %) as micro-particles reinforcement materials. The attained composite alloy specimens' characteristics were estimated such as microstructure, relative density, electrical and thermal conductivity, hardness, and compression yield stress properties to adjust the suitable optimum percentage of reinforcing material which has the best physical and mechanical properties with different main matrix materials whether pure Cu powder or Cu-Ni mechanical alloy. The micron-sized
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35

Wang, Sheng-Chang, and Wen-Cheng J. Wei. "Characterization of electroplated Ni/SiC and Ni/Al2O3 composite coatings bearing nanoparticles." Journal of Materials Research 18, no. 7 (2003): 1566–74. http://dx.doi.org/10.1557/jmr.2003.0216.

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Анотація:
Ultrafine SiC and Al2O3 particles with 30–50 nm sizes were used to codeposit with Ni in a sulfamate bath to form composite coatings. The microstructure and mechanical properties of the layers were investigated by x-ray diffractometry, scanning and transmission electron microscopy, high-resolution transmission electron microscopy, microindentation, and wear testing. The microstructural results revealed that 7 vol% of SiC or Al2O3 particles dispersed randomly in the Ni matrix. The addition of the ultrafine SiC or Al2O3powder into the Ni matrix apparently reduced the size of Ni grains during the
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36

Hamoudi, Souaad, Nacer Bezzi, Farid Bensebaa, and Philippe Delaporte. "Alumina–Nano-Nickel Composite Coatings on Al6061 Substrate Obtained by Electrophoretic Deposition." Journal of Composites Science 9, no. 3 (2025): 122. https://doi.org/10.3390/jcs9030122.

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Анотація:
Ceramic–nano-metallic composite coatings of Al2O3–nano-Ni on an aluminum substrate (Al6061) were obtained using electrophoretic deposition (EPD). Three composite coatings with different ratios of nano-Ni, i.e., 25, 50, and 75%, were obtained. The phase composition of the resulting composite coatings was examined using XRD; this confirmed the existence of alumina and nickel in the composite coatings. The surface morphology and microstructure of the composite coatings were analyzed with SEM, while the chemical composition and phase content were determined through energy-dispersive spectroscopy.
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37

Konopka, Katarzyna, Justyna Zygmuntowicz, Marek Krasnowski, Konrad Cymerman, Marcin Wachowski, and Paulina Piotrkiewicz. "Pulse Plasma Sintering of NiAl-Al2O3 Composite Powder Produced by Mechanical Alloying with Contribution of Nanometric Al2O3 Powder." Materials 15, no. 2 (2022): 407. http://dx.doi.org/10.3390/ma15020407.

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Анотація:
NiAl-Al2O3 composites, fabricated from the prepared composite powders by mechanical alloying and then consolidated by pulse plasma sintering, were presented. The use of nanometric alumina powder for reinforcement of a synthetized intermetallic matrix was the innovative concept of this work. Moreover, this is the first reported attempt to use the Pulse Plasma Sintering (PPS) method to consolidate composite powder with the contribution of nanometric alumina powder. The composite powders consisting of the intermetallic phase NiAl and Al2O3 were prepared by mechanical alloying from powder mixtures
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38

Fan, Hui, Jie Jiang, Yangpei Zhao, Shankui Wang, and Zhijing Li. "Improvement of microstructure and properties of Ni–Al2O3 composite coating via jet electrodeposition." International Journal of Modern Physics B 34, no. 27 (2020): 2050243. http://dx.doi.org/10.1142/s0217979220502434.

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Анотація:
Ni–Al2O3 composite coatings were prepared with a modified Watt’s bath by using jet electrodeposition method. As the key process parameter, current density and the addition of Al2O3 nanoparticles in electrolyte were studied about the effect on the surface morphology and co-deposition of Al2O3 nanoparticles of composite coating. The mechanical and tribological properties of the composite coating were also tested. The results show that properly increasing the current density and Al2O3 addition can increase the co-deposition of nanoparticles in the coating and promote the formation of a dense and
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39

Li, Feng, Hua Song, and Hua Yang Zhang. "Preparation and Ultra-Deep Hydrorefining Performance of Ni-P/Al2O3-ZrO2 Catalysts." Advanced Materials Research 236-238 (May 2011): 724–27. http://dx.doi.org/10.4028/www.scientific.net/amr.236-238.724.

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Анотація:
A series of Al2O3-ZrO2 (AZ-X) composite oxides with different ZrO2 contents were prepared by a chemical precipitation method. Ni-P/AZ-X catalysts were prepared by temperature-programmed reduction. The supports and catalysts were extensively characterized by X-ray diffraction (XRD) and BET. The effects of support composition and P/Ni molar ratios on the catalytic performance of the catalysts were investigated by thiophene hydrodesulfurization (HDS) and pyridine hydrodenitrogenation (HDN). In comparison with Al2O3, Al2O3-ZrO2 (20 wt% ZrO2) composite oxide supported Ni-P catalyst exhibited higher
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40

Sun, Fengqiao, Xiaofeng Zhang, Long Li, et al. "Exploring How Dopants Strengthen Metal-Ni/Ceramic-Al2O3 Interface Structures at the Atomic and Electronic Levels." Molecules 30, no. 9 (2025): 1990. https://doi.org/10.3390/molecules30091990.

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Анотація:
The metal-based/ceramic interface structure is a key research focus in science, and addressing the stability of the interface has significant scientific importance as well as economic value. In this project, the work of adhesion, heat of segregation, electronic structure, charge density, and density of states for doped-M (M = Ti, Mg, Cu, Zn, Si, Mn, or Al) Ni (111)/Al2O3 (0001) interface structures are studied using first-principle calculation methods. The calculation results demonstrate that doping Ti and Mg can increase the bonding strength of the Ni–Al2O3 interface by factors of 3.4 and 1.5
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41

Voicu, Cristina, Florin Popa, Petru Pascuta, and Ionel Chicinaş. "Structural and Morphological Evaluation of 25% vol. Ni/Al2O3 Nanocomposite Powders Produced by Mechanical Milling." Advanced Engineering Forum 13 (June 2015): 48–53. http://dx.doi.org/10.4028/www.scientific.net/aef.13.48.

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Анотація:
The evolution of the Al2O3/Ni (25% vol. Ni) composite powders, during the milling and the stability of the composite phases were investigated by X-ray diffraction (XRD), scanning electron microscopy (SEM) and energy dispersive X-ray microanalysis (EDX). SEM images show a high level of homogenization of the Ni and Al2O3 phases for milling times larger than 120 minutes. The X-ray study indicates no reaction between the two phases. The crystallite grain size decreases with the milling time for both phases.
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42

Dyl, Tomasz Cyryl, Robert Skoblik, and Robert Starosta. "The Effect of the Ceramic Dispersion on the Nickel Matrix Composite Coating Properties after Plastic Working." Solid State Phenomena 147-149 (January 2009): 813–18. http://dx.doi.org/10.4028/www.scientific.net/ssp.147-149.813.

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Анотація:
The paper presents the effect of dispersion phase of Al2O3 on selected potential properties of composite coatings on the nickel base. Coatings of Ni-Al-Al2O3 were applied on the steel specimens using the subsonic process of flame spraying. The specimens were then subjected to both cold and hot plastic working by rolling and also cold pressing by the hydraulic press. Plastic working is an alternative to machining, as the method of finishing of coats applied by flame spraying. The paper presents the findings of the research into the possibility of using plastic working (hot and cold rolling and
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43

Fang, Ming Hao, Yan Gai Liu, and Zhao Hui Huang. "Microstructure and Corrosion Behaviour of Ni/Al-Al2O3 Gradient Ceramic Coatings on Q235 Steel." Key Engineering Materials 336-338 (April 2007): 2647–48. http://dx.doi.org/10.4028/www.scientific.net/kem.336-338.2647.

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Анотація:
Ni/Al-Al2O3 gradient ceramic coating was prepared on Q235 steel by plasma spraying. Microstructure and corrosion behavior in boiling 5%HCl solution of the samples sprayed with this coating were investigated. The results showed that thickness of Al2O3 ceramic coating was increased greatly and almost no connected pores formed in the gradient coating due to the existent of Ni/Al-Al2O3 transition interlayer coatings. The corrosion resistance of Q235 steel with Ni/Al-Al2O3 gradient composite ceramic coating in boiling 5%HCl solution was greatly improved.
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44

Góral, A., K. Berent, M. Nowak, and B. Kania. "Microstructure and Properties of Ni and Ni/Al2O3 Coatings Electrodeposited at Various Current Densities." Archives of Metallurgy and Materials 61, no. 1 (2016): 55–60. http://dx.doi.org/10.1515/amm-2016-0001.

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Анотація:
The study presents investigations of an influence of various direct current densities on microstructure, residual stresses, texture, microhardness and corrosion resistance of the nickel coatings electrodeposited from modified Watt’s baths. The properties of obtained coatings were compared to the nano-crystalline composite Ni/Al2O3 coatings prepared under the same plating conditions. The similarities and differences of the obtained coatings microstructures visible on both their surfaces and cross sections and determined properties were presented. The differences in the growth character of the N
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45

Hsu, Chih I., Kung Hsu Hou, and Ming Der Ger. "Tribological Properties of Al2O3 Particles Reinforced Ni-P Composite Coating." Key Engineering Materials 739 (June 2017): 148–51. http://dx.doi.org/10.4028/www.scientific.net/kem.739.148.

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Анотація:
In this study, hardness and wear resistance of electroless Ni–P and Ni–P/Al2O3 composite coating have been investigated. These composite coatings are applied on iron substrate by electroless deposition process and then they were heat treated at 400°C for 1h. Surface and cross-section morphology of composite deposits have been investigated by scanning electron microscopy (SEM) and microstructural changes were evaluated by X-ray diffraction (XRD) analysis. The results showed that the Al2O3 particles co-deposited in Ni–P matrix led to an increase in the hardness and improve wear resistance, espec
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46

Góral, Anna, E. Bełtowska-Lehman, and P. Indyka. "Structure Characterization of Ni/Al2O3 Composite Coatings Prepared by Electrodeposition." Solid State Phenomena 163 (June 2010): 64–67. http://dx.doi.org/10.4028/www.scientific.net/ssp.163.64.

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Анотація:
In the present study, the electrodeposition of composites consisted of metal matrix (nickel) and inert particles (hard nano-sized Al2O3 oxide) has been carried out in a Watt’s type bath of pH 4, at room temperature in a system with the steel rotating disk electrode. The influence of dispersed Al2O3 powder on structure characteristics (morphology, phase composition, texture, residual stresses) of Ni/Al2O3 coatings has been investigated. The crystallographic texture of Ni and Ni/Al2O3 coatings deposited on the steel substrates was analyzed by XRD technique based on the back-reflection pole figur
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47

Zhu, Lijuan, Chun Feng, Shenglong Zhu, Fuhui Wang, Juntao Yuan, and Peng Wang. "Comparison of CrN, AlN and TiN Diffusion Barriers on the Interdiffusion and Oxidation Behaviors of Ni+CrAlYSiN Nanocomposite Coatings." Crystals 11, no. 11 (2021): 1333. http://dx.doi.org/10.3390/cryst11111333.

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Анотація:
CrN, AlN, TiN layer were prepared as diffusion barriers between the K417 substrate and Ni+CrAlYSiN nano composite coatings via vacuum arc evaporation. Oxidation kinetics and microstructure evaluation of these nano coating systems at 1000 °C after 100 h were studied. Results show that the AlN layer showed good thermodynamic stability, effectively inhibited the interdiffusion between the coating and the substrate, improved the oxidation resistance of Ni+CrAlYSiN nano composite coatings, and a single-layer Al2O3 film was formed on the coating. The CrN layer was decomposed, which did not block the
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48

Belhamra, Nadjette, Abd Raouf Boulebtina, Khadidja Belassadi, Abdelouahed Chala, and Malika Diafi. "Effect of Doping of Nanoparticles on the Properties of Zn-Ni Composite Coatings." Diffusion Foundations 18 (September 2018): 19–26. http://dx.doi.org/10.4028/www.scientific.net/df.18.19.

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Анотація:
The purpose of this paper was to investigate the effect of Al2O3 and TiO2 nanoparticles contents on structural proporties, microhardness and corrosion resistance of Zn-Ni alloy coationg. Zn-Ni, Zn-Ni-Al2O3 and Zn-Ni-TiO2 composite coatings were electrodeposited on steel substrate by direct current in sulphate bath.The structure of the coatings was studied by X-ray diffration and by scaning electron miroscopy. The results showed the appearance of Ni5Zn21 phases and that the incrorporation of Al2O3 and TiO2 in the Zn-Ni coating refined the crystal grain size.The corrosion performance of coating
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49

Zellele, Daniel M., Gulmira Sh Yar-Mukhamedova, and Malgorzata Rutkowska-Gorczyca. "A Review on Properties of Electrodeposited Nickel Composite Coatings: Ni-Al2O3, Ni-SiC, Ni-ZrO2, Ni-TiO2 and Ni-WC." Materials 17, no. 23 (2024): 5715. http://dx.doi.org/10.3390/ma17235715.

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Анотація:
Nickel electrodeposition is a widely utilized method for creating thin films on various substrates with various desirable attributes. Recently, there has been a growing interest in developing nickel composite coatings that incorporate additional elements or particles into the nickel matrix to enhance their properties. These composite coatings offer superior corrosion resistance, hardness, tribological, and other functional benefits compared with pure nickel coatings. Some of the recent advancements in electrodeposited nickel composite coatings include improved wear resistance, enhanced mechani
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50

Kadhim, Hala M. "Microstructure Study and Morphology of Ni / Nano Al2O3 Composite Coating Synthesied by Electroless Plating." Diyala Journal of Engineering Sciences 14, no. 3 (2021): 1–7. http://dx.doi.org/10.24237/djes.2021.14301.

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Анотація:
The electroless deposition method was used to prepare Ni-based nanocomposite coatings, this approach represents an alternate way of having coatings on the different substrates. Most of the previous literatures on this subject and work deals with a study the effect of the process conditions and, Bath composition on the microstructure at the macroscale of Ni-Al2O3 composite coatings. Though, effect on the step structure of the composition of the bath and microstructure are little, the present work aims to study the effect of hard ceramic Al2O3 nanoparticles at different concentrations (0.0, 0.5,
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