scholarly journals A review on the application of inorganic nanoparticles in chemical surface coatings on metallic substrates

RSC Advances ◽  
2017 ◽  
Vol 7 (13) ◽  
pp. 7531-7539 ◽  
Author(s):  
Cong-cong Jiang ◽  
Yan-ke Cao ◽  
Gui-yong Xiao ◽  
Rui-fu Zhu ◽  
Yu-peng Lu
Keyword(s):  
Mechanical Properties ◽  
Corrosion Resistance ◽  
Functional Properties ◽  
Inorganic Nanoparticles ◽  
Surface Coatings ◽  
Nanocomposite Coatings ◽  
Metallic Substrates ◽  
Chemical Surface

Nanocomposite coatings obtained by the controlled addition of inorganic nanoparticles into the treatment baths not only improve the corrosion resistance and mechanical properties, but also enhance the functional properties.

Composite 316L+Al2O3 for Application in Medicine

2012 ◽  
Vol 706-709 ◽  
pp. 643-648
Author(s):  
Agata Dudek ◽  
Renata Włodarczyk
Keyword(s):  
Mechanical Properties ◽  
Corrosion Resistance ◽  
Austenitic Steel ◽  
Functional Properties ◽  
Ceramic Materials ◽  
Ceramic Composites ◽  
New Materials ◽  
Metallic Material ◽  
Joint Prostheses

The demand for new materials in medicine is on the increase today. Long-lasting implants (joint prostheses, dentistry implants), made typically of metals and their alloys, are characterized with high mechanical properties, however their corrosion resistance and biocompatibility are relatively low. One of the methods to ensure particular functional properties is to employ composite implants, combining improved mechanical properties of metallic material with biocompatibility of ceramic materials. The study aimed to develop and analyse properties of metallic/ceramic composites made of the mixture of powders: austenitic steel (316LHD) and ceramics (Al2O3).

Investigation of the physical and mechanical properties of Ni–P and Ni–P–PTFE nanocomposite coatings deposited on aluminum alloy 7023

2017 ◽  
Vol 233 (1) ◽  
pp. 94-103 ◽  
Author(s):  
Morteza Tajbakhsh ◽  
Omid Yaghobizadeh ◽  
Mahmood Farhadi Nia
Keyword(s):  
Mechanical Properties ◽  
Heat Treatment ◽  
Corrosion Resistance ◽  
Ph Value ◽  
Physical And Mechanical Properties ◽  
Corrosion Current ◽  
Nanocomposite Coatings ◽  
Solution Temperature ◽  
Hard Phase ◽  
Electroless Process

In this study, various properties of Ni–P and Ni–P–PTFE coating fabricated by electroless process were investigated. These coatings were applied on aircraft-grade aluminum samples. The results showed that the addition of nano-PTFE particles decreases coating rate from 7.1 µm/h to 6.1 µm/h and hardness from 510 HV to 200 HV. Also by increasing the pH value, coating rate increases from 1 µm/h to 7 µm/h. Increasing the solution temperature from 75 ℃ to 90 ℃ also increases the hardness of coating from 125 HV to 210 HV. The results showed that the heat treatment at 300 ℃ for 4 h increases the hardness up to 375 HV due to formation of Ni3P hard phase in Ni–P–PTFE coating. Addition of PTFE particles have improved tribological properties due to its lubricating effects and simultaneously, have reduced corrosion resistance compared to Ni–P coatings, so that the corrosion current for Al, Ni–P, and Ni–P–PTFE coatings is −880, −550, and −770 μA/cm2, respectively.

Improvement of Mechanical Properties of the Tool Using Nanocomposite Coatings

2021 ◽  
Vol 1040 ◽  
pp. 68-74
Author(s):  
Eldar M. Salpagarov ◽  
Andrey A. Belyakov ◽  
Aleksei V. Sivenkov
Keyword(s):  
Mechanical Properties ◽  
Wear Resistance ◽  
Tool Material ◽  
Physical And Mechanical Properties ◽  
Mechanical Tests ◽  
Surface Coatings ◽  
Nanocomposite Coatings ◽  
Multilayer Composite ◽  
Factors Affecting ◽  
Main Disadvantage

The main purpose of this work is to study and evaluate the mechanical properties of nanocomposite coatings based on metal-ceramics. The research also estimates factors affecting the unique properties of these surface coatings. The study compares the physical and mechanical properties of tool material plates with a nanodispersed multilayer composite coating and analyzes the results of mechanical tests with and without these coverings. The results of the investigation show that nanocomposite coatings contribute to hardness, strength and wear resistance more than three times, while traditional hardening methods, such as thermal and chemical-thermal treatment, improve the mechanical properties much less. It can be concluded that nanocomposite coatings can increase the strength resource of the tool. Their main disadvantage is the individuality of the properties of each coating and the need for expensive equipment for their creation and application. In the use of nanocomposite coatings to increase surface properties, multicomponent coatings are of the greatest interest. As a result of this work, the nanocomposite metal coating of the nc-TiN/a-Si3N4 system was studied, the dependence of properties on the content of the nc-TiN and a-Si3N4 phases was examined, and the optimal ratio was found which ensured the highest values of hardness with the best wear resistance.

scholarly journals EFFECT OF TIO2 NANOPARTICLES IN NI MATRIX ON MECHANICAL AND CORROSION RESISTANCE PROPERTIES

2017 ◽  
Vol 23 (1) ◽  
pp. 37 ◽  
Author(s):  
Amer Mekkaoui ◽  
Shahnez Saied ◽  
Okba Belahssen ◽  
Abdelouahed Chala
Keyword(s):  
Mechanical Properties ◽  
Corrosion Resistance ◽  
Crystallite Size ◽  
Nanocomposite Coating ◽  
Corrosion Property ◽  
Hard Coatings ◽  
Nanocomposite Coatings ◽  
Nacl Solution ◽  
High Concentration ◽  
Corrosion Properties

<p class="AMSmaintext">Nickel (Ni) is one of the most important hard coatings. Improvement in its tribological and mechanical properties would greatly enhance its use in industry. Nanocomposite coatings of metals with various reinforced nanoparticles have been developed in last few decades. Titania (TiO<sub>2</sub>) exhibit excellent mechanical properties. It is believed that TiO<sub>2</sub> incorporation in Ni matrix will improve the properties of Ni coatings significantly. The main purpose of the current work is to investigate the mechanical and anti-corrosion properties of the electroplated Nickel nanocomposite with a different percentage of TiO<sub>2</sub>. The results showed that the content of TiO<sub>2</sub> and the microhardness in the Ni-TiO<sub>2</sub> coatings first increased and reached the maximum at the loading of 20 g/L, then decreased, due to agglomeration of dioxide of Titania for high concentration of TiO<sub>2</sub>. The [200] preferred orientation for Ni pure gradually evolved to [111] orientation with increasing TiO<sub>2</sub> nanoparticle loading. At 20 g/L of TiO<sub>2</sub> we obtained the minimum crystallite size (27 nm). The anti-corrosion property of nanocomposite coating was carried out in 3.5 % NaCl solution and the result also showed that the nanocomposite coatings improve the corrosion resistance significantly. This present work reveals that incorporation of TiO<sub>2</sub> in nickel nanocomposite coating can improved corrosion resistance and mechanical properties of both hardness and corrosion resistance performances, and the improvement becomes at it maximum for 20 g/L of TiO<sub>2</sub>.</p>

Corrosion resistance and mechanical properties of quenched and tempered 28MnCrB5 steel in two acidic environments

2017 ◽  
Vol 59 (3) ◽  
pp. 221-225 ◽  
Author(s):  
Aysel Yazıcı ◽  
M. Sadrettin Zeybek ◽  
Hüseyin Güler ◽  
Ahmet Murat Pınar ◽  
Renas Tücer
Keyword(s):  
Mechanical Properties ◽  
Corrosion Resistance ◽  
Acidic Environments
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