Fabrication and Characterization of Sn-Based Babbitt Alloy Nanocomposite Reinforced with Al2O3 Nanoparticles/Carbon Steel Bimetallic Material

Sn-based Babbitt alloy was reinforced with alumina nanoparticles to prepare a novel class of nanocomposites. The route of liquid metallurgy in combination with stirring mechanism was chosen to prepare nanocomposites with three different loadings of alumina nanoparticles, i.e., 0.25 wt%, 0.50 wt% and 1.0 wt%. The molten mixture of metallic matrix and nanoparticles was poured over carbon steel substrate for solidification to manufacture a bimetallic material for bearing applications. The underlying aim was to understand the effect of nanoparticle addition on microstructural variation of Sn-based Babbitt alloy as well as bimetallic microstructural interface. The addition of 0.25 wt% and 0.50 wt% alumina nanoparticles significantly affected both the morphology and distribution of Cu6Sn5 hard phase in solid solution, which changed from needle and asterisk shape to spherical morphology. Nanocomposites containing up to 0.50 wt% nanoparticles showed more improvement in tensile strength than the one containing 1.0 wt% nanoparticles, due to nanoparticle-agglomeration and micro-cracks at the interface. The addition of 0.5 wt% nanoparticles significantly improved the wear resistance of Sn-based Babbitt alloy.

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Nanoparticle Reinforced Metal Composites Prepared by Electrocodeposition

Volume 2B: Advanced Manufacturing ◽

10.1115/imece2013-62300 ◽

2013 ◽

Author(s):

Michael J. Koludrovich ◽

Yong X. Gan

Keyword(s):

Thin Films ◽

Nanocomposite Films ◽

Alumina Nanoparticles ◽

Al2o3 Nanoparticles ◽

Nanoparticle Agglomeration ◽

Control Film ◽

Significant Difference ◽

Nanocomposite Thin Films ◽

Agglomeration Of Nanoparticles ◽

Pure Cu

Improving the physical and mechanical properties such as hardness and strength of metal thin films can be achieved by incorporating nanoparticles into the pure metals, for example via electrocodeposition. However, the agglomeration of nanoparticles during electrocodeposition of nanocomposite thin films is an unresolved issue. This paper presents the preliminary results of electrocodeposition thin nanocomposite films under different processing conditions. The microstructure and distribution of Al2O3 nanoparticles in electrocodeposited Cu matrix nanocomposite thin films on a pure Al plate were examined. In addition, the effect of electrolyte concentration on the agglomeration of nanoparticles was studied. Different stirring times were used for electrodepositing the alumina/Cu nanocomposite and the pure Cu control film. Under the constant stirring condition, different deposition times including 1, 4, 8, 12, and 24 hours were taken to study the differences between the agglomeration states of the alumina nanoparticles with the time change. We also examined the effect of turning the electromagnetic stirrer ON and OFF at different time intervals from as short as every 20 minutes to as long as ON and OFF every 2 hours on the nanoparticle agglomeration in the film. Optical and electron microscopic studies were made to reveal the microstructure of the nanocomposite. It is found that there is no significant difference in microstructures for the specimens that made under either intermittent stirring or constant stirring for the same length of time.

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Interfacial Microstructure and Corrosion Behaviour of Mild Steel Coated with Alumina Nanoparticles Doped Tin Composite via Direct Tinning Route

Coatings ◽

10.3390/coatings11111318 ◽

2021 ◽

Vol 11 (11) ◽

pp. 1318

Author(s):

Abdulaziz S. Alghamdi ◽

K. S. Abdel Halim ◽

Mohammed A. Amin ◽

Abdullah S. Alshammari ◽

Naglaa Fathy ◽

...

Keyword(s):

Corrosion Resistance ◽

Mild Steel ◽

Coating Layer ◽

Corrosion Behaviour ◽

Steel Substrate ◽

Composite Layer ◽

Interfacial Microstructure ◽

Alumina Nanoparticles ◽

Al2o3 Nanoparticles ◽

Metallic Materials

The improvement of the surface properties of ferrous metallic materials has become a crucial criterion for advanced engineering applications. The interfacial microstructure and corrosion behaviour of mild steel coated with alumina nanoparticles doped in tin composite using the direct tinning technique were investigated. A coating layer of tin composite containing different loads of Al2O3 nanoparticles (0.25 wt.%, 0.50 wt.%, 1.00 wt.% and 1.5 wt.%) was prepared and directly deposited on a mild steel substrate. This type of a direct tinning process is considered to be a simple and low-cost route for protecting metallic materials from corrosion. It was found that the thickness of both the composite layer and Fe-Sn intermetallic layer at the coated interfaces was highly affected by the presence of alumina nanoparticles that effectively inhibit the diffusion of Sn atoms into the Fe substrate. For the samples coated with lower content of alumina nanoparticles (0.25 wt.% and 0.50 wt.%), the thickness of the Fe-Sn intermetallic coating (IMC) layer is decreased due to Fe-Sn IMC suppression. Otherwise, for the addition of more alumina nanoparticles (1.00 wt.% and 1.50 wt.%), the thickness of the Fe-Sn IMC layer is slightly increased because of nanoparticle’s agglomeration and flotation. It can be reported that the presence of alumina nanoparticles in the coating layer improves, to a great extent, the corrosion resistance of Sn-composites surface on mild steel substrates. Although the tin composite coating layer with a high quantity of alumina nanoparticles (1.0 wt.%) exhibited better corrosion resistance than the other tested samples, such nanoparticle additions have become increasingly difficult to obtain. It was observed that the Al2O3 nanoparticles agglomeration and flotation that were detected in the coating surface may be related to high fraction nanoparticles loading and to the difference in the gravity for Sn and Al2O3 nanoparticles. However, based on our investigation, a coating layer that contains 0.50 wt.% alumina nanoparticles is highly recommended for achieving long lasting and high-performance corrosion resistance for coated mild steel with minimal coating layer defects.

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The study of the electrochemical properties of zinc-rich coating on the base of water sodium silicate

Practice of Anticorrosive Protection ◽

10.31615/j.corros.prot.2019.94.4-6 ◽

2019 ◽

Vol 24 (4) ◽

pp. 51-58

Author(s):

Le Hong Quan ◽

Nguyen Van Chi ◽

Mai Van Minh ◽

Nong Quoc Quang ◽

Dong Van Kien

Keyword(s):

Carbon Steel ◽

Electrochemical Properties ◽

Sodium Silicate ◽

Cathodic Protection ◽

Electrochemical Impedance ◽

Steel Substrate ◽

Electrical Contact ◽

Electrochemical Impedance Spectra ◽

Pure Zinc ◽

Electric Circuits

The study examines the electrochemical properties of a coating based on water sodium silicate and pure zinc dust (ZSC, working title - TTL-VN) using the Electrochemical Impedance Spectra (EIS) with AutoLAB PGSTAT204N. The system consists of three electrodes: Ag/AgCl (SCE) reference electrode in 3 M solution of KCl, auxiliary electrode Pt (8x8 mm) and working electrodes (carbon steel with surface treatment up to Sa 2.5) for determination of corrosion potential (Ecorr) and calculation of equivalent electric circuits used for explanation of impedance measurement results. It was shown that electrochemical method is effective for study of corrosion characteristics of ZSC on steel. We proposed an interpretation of the deterioration over time of the ability of zinc particles in paint to provide cathodic protection for carbon steel. The results show that the value of Ecorr is between -0,9 and -1,1 V / SCE for ten days of diving. This means that there is an electrical contact between the zinc particles, which provides good cathodic protection for the steel substrate and most of the zinc particles were involved in the osmosis process. The good characteristics of the TTL-VN coating during immersion in a 3,5% NaCl solution can also be explained by the preservation of corrosive zinc products in the coating, which allows the creation of random barrier properties.

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MWCNTs Addition to Al2O3-SiC Binary Coating Deposited by Plasma Thermal Spray on Low Carbon Steel Substrate

IOP Conference Series Materials Science and Engineering ◽

10.1088/1757-899x/1094/1/012158 ◽

2021 ◽

Vol 1094 (1) ◽

pp. 012158

Author(s):

Zainab Jalal ◽

Kadhim F Al-Sultani ◽

Hassan Sh Majdi

Keyword(s):

Carbon Steel ◽

Thermal Spray ◽

Steel Substrate ◽

Low Carbon Steel ◽

Low Carbon

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High-Temperature Oxidation Resistance of Electroless Ni-P-ZrO2 Composite Coatings

Materials Science Forum ◽

10.4028/www.scientific.net/msf.686.569 ◽

2011 ◽

Vol 686 ◽

pp. 569-573 ◽

Cited By ~ 2

Author(s):

Ming Feng Tan ◽

Wan Chang Sun ◽

Lei Zhang ◽

Quan Zhou ◽

Jin Ding

Keyword(s):

High Temperature ◽

Carbon Steel ◽

Oxidation Resistance ◽

High Temperature Oxidation ◽

Steel Substrate ◽

Composite Coatings ◽

Low Carbon ◽

Temperature Oxidation ◽

P Matrix ◽

Electroless Ni

Electroless Ni-P coating containing ZrO2particles was successfully co-deposited on low carbon steel substrate. The surface and cross-sectional micrographs of the composite coatings were observed with scanning electron microscopy (SEM). And the chemical composition of the coating was analyzed with energy dispersive spectroscopy (EDS). The oxidation resistance was evaluated by weight gains during high temperature oxidation test. The results showed that the embedded ZrO2particles with irregular shape uniformly distributed in the entire Ni-P matrix, and the coating showed a good adhesion to the substrate. The weight gain curves of Ni-P-ZrO2composite coatings and Ni-P coating at 923K oxidation experiments were in accordance with . The ZrO2particles in Ni-P matrix could significantly enhance the high temperature oxidation resistance of the carbon steel substrate as compared to pure Ni-P coating.

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Effects of Dipping Pretreatment on the Flame Deposition of Carbon Nanostructure on the Low Carbon Steel Substrate

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.734-737.2269 ◽

2013 ◽

Vol 734-737 ◽

pp. 2269-2272

Author(s):

Hong Mei Zhu ◽

Shu Mei Lei ◽

Tong Chun Kuang

Keyword(s):

Nitric Acid ◽

Carbon Steel ◽

Acid Solution ◽

Carbon Nanofibers ◽

Carbon Nanoparticles ◽

Steel Substrate ◽

Low Carbon Steel ◽

Low Carbon ◽

Carbon Nanostructure ◽

Flame Method

In this paper, a low carbon steel was used as the substrate to prepare the carbon nanostructural materials by the oxygen-acetylene flame method. The experimental results show that the composite products including nodular carbon nanoparticles and amorphous carbon were obtained on the substrate after a mechanical polishing pretreatment. Comparatively, the short tubular carbon nanofibers with the diameter of around 100 nm were deposited on the substrate pretreated by dipping in the concentrated nitric acid solution. The possible mechanism for the growth of such carbon nanofibers was discussed.

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