scholarly journals Comparison of CrN, AlN and TiN Diffusion Barriers on the Interdiffusion and Oxidation Behaviors of Ni+CrAlYSiN Nanocomposite Coatings

Crystals ◽  
2021 ◽  
Vol 11 (11) ◽  
pp. 1333
Author(s):  
Lijuan Zhu ◽  
Chun Feng ◽  
Shenglong Zhu ◽  
Fuhui Wang ◽  
Juntao Yuan ◽  
...  
Keyword(s):  
Composite Coating ◽  
Oxidation Resistance ◽  
Diffusion Barrier ◽  
Composite Coatings ◽  
Single Layer ◽  
Film Structure ◽  
Diffusion Barriers ◽  
Vacuum Arc ◽  
Nano Composite ◽  
Nano Coating

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 diffusion of elements and had little effect on the oxidation resistance of the Ni+CrAlYSiN nano composite coating. The TiN layer effectively prevented the interdiffusion between the coating and the substrate. However, it deteriorated the oxidation resistance of the composite coating. Similar to the Ni+CrAlYSiN coating without a diffusion barrier, a double-layer oxide film structure with Al2O3 as the inner layer and Ni(Al,Cr)2O4 as the outer layer formed on the Ni+CrAlYSiN nano composite coatings with the CrN or TiN diffusion barrier.

Experimental investigation of electrodeposited Ni-Al2O3/ZrO2 nano composite on HSLA ASTM A860 alloy

2021 ◽  
Author(s):  
Chandrasekhara Sastry Chebiyyam ◽  
Pradeep N ◽  
Shaik AM ◽  
Hafeezur Rahman A ◽  
Sandeep Patil
Keyword(s):  
Grain Size ◽  
Corrosion Resistance ◽  
Composite Coating ◽  
Base Alloy ◽  
Composite Coatings ◽  
Nano Particles ◽  
Alloy Sample ◽  
Nano Composite ◽  
Nano Coating ◽  
Nano Composite Coating

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 increase in cathode efficiency is ascertained. An XRD analysis of the nano composite coating indicates a curtailment in grain size along with increase in the nucleation sites causing a surge in the growth of nano coating layer. In correlation to uncoated HSLA ASTM A36 alloy sample, a surge in compressive residual stress by 47.14%, reduction of waviness by 32.14% (AFM analysis), upsurge in microhardness by 67.77% is ascertained in Ni-Al2O3/ZrO2 nano composite coating. Furthermore, in nano coated Ni-Al2O3/ZrO2 composite a reduction is observed pertaining to weight loss and friction coefficients by 27.44% and 13% in correlation to plain uncoated alloy respectively. A morphology analysis after nano coating indicates, Ni-Al2O3/ZrO2 particles occupy the areas of micro holes, reducing the wide gaps and crevice points inside the matrix of the substrate, enacting as a physical barrier to upsurge the corrosion resistance by 67.72% in correlation to HSLA ASTM A860 base alloy.

scholarly journals Improvement of structure and quality of nanoscale multilayered composite coatings, deposited by filtered cathodic vacuum arc deposition method

2016 ◽  
Vol 7 ◽  
pp. 184798041668080 ◽  
Author(s):  
Alexey A Vereschaka ◽  
Anatoly S Vereschaka ◽  
Andre DL Batako ◽  
Boris J Mokritskii ◽  
Anatoliy Y Aksenenko ◽  
...  
Keyword(s):  
Composite Coating ◽  
Surface Defects ◽  
Composite Coatings ◽  
Cutting Tools ◽  
Vacuum Arc ◽  
Multilayered Composite ◽  
Vacuum Arc Deposition ◽  
Filtered Cathodic Vacuum Arc ◽  
Longitudinal Turning ◽  
Arc Deposition

This article studies the specific features of cathode vacuum arc deposition of coatings used in the production of cutting tools. The detailed analysis of the major drawbacks of arc-Physical Vapour Deposition (PVD) methods has contributed to the development of the processes of filtered cathodic vacuum arc deposition to form nanoscale multilayered composite coatings of increased efficiency. This is achieved through the formation of nanostructure, increase in strength of adhesion of coating to substrate up to 20%, and reduction of such dangerous coating surface defects as macro- and microdroplets up to 80%. This article presents the results of the studies of various properties of developed nanoscale multilayered composite coating. The certification tests of carbide tool equipped with cutting inserts with developed nanoscale multilayered composite coating compositions in longitudinal turning (continuous cutting) and end symmetric milling, and intermittent cutting of steel C45 and hard-to-cut nickel alloy of NiCr20TiAl showed advantages of tool with nanoscale multilayered composite coating as compared to the tool without coating. The lifetime of the carbide inserts with developed NMCC based on the system of Ti–TiN–(NbZrTiCr)N (filtered cathodic vacuum arc deposition) was increased up to 5–6 times in comparison with the control tools without coatings and up to 1.5–2.0 times in comparison with nanoscale multilayered composite coating based on the system of Ti–TiN–(NbZrTiCr)N (standard arc-PVD technology).

Forming Mechanism of Composite Coating with Nano-Particles and its Wear Resistance

2013 ◽  
Vol 281 ◽  
pp. 500-504 ◽  
Author(s):  
Xue Song Li ◽  
Long Sheng He ◽  
You Yang
Keyword(s):  
Composite Coating ◽  
Composite Coatings ◽  
Pure Copper ◽  
Copper Substrate ◽  
Nano Particles ◽  
Nano Composite ◽  
Forming Mechanism ◽  
Nickel Coatings ◽  
Electrodeposited Nickel ◽  
Nanometer Particles

Ni-SiC nano composite coatings were prepared on pure copper substrate. The surface morphology and distribution of nanometer particles of the composite coatings were observed by scanning electron microscope (SEM), micro-hardness of coatings was tested by HXD-1000 microharder. The results showed that microstructure of Ni-SiC nano composite coating is different from that of electrodeposited nickel coatings. Its electrodepositing process abided by the principal of adsorption. By adding nanometer particles, the structure of composite coatings can be effectively fined, microhardness of composite coatings is improved apparently by comparing with that of electrodeposited nickel coatings. Abrasion resistance of Ni-SiC nano composite coatings is excellent.

Effects of Current Density on the Microstructure and Properties of Electrodeposited Black Cr-C Nano-Composite Coatings on Steel Substrate

2011 ◽  
Vol 687 ◽  
pp. 641-646 ◽  
Author(s):  
Xue Song Li ◽  
Yue Yang ◽  
You Yang ◽  
Hua Wu
Keyword(s):  
Composite Coating ◽  
Current Density ◽  
Steel Substrate ◽  
Composite Coatings ◽  
Scanning Electronic Microscopy ◽  
Electronic Microscopy ◽  
Particle Content ◽  
Nano Composite ◽  
X Ray ◽  
Nano Composite Coating

Eelectrodeposited black Cr-C nano-composite coating was prepared on the steel substrate and the effects of current density on the properties of the composite coating were studied in the present paper. The surface morphology and phase composition of the composite coatings were analyzed by means of scanning electronic microscopy (SEM) and X-ray diffractometer (XRD). Microhardness was determined by micrometer and the wear resistance of the coatings was evaluated by CETR using a universal materials tester (UMT). The results showed that formed under the condition of current density of 100A/dm2, temperature of 15°C, and the optimum particle content in electrolyte was 10g/l. The maximum microhardness of black Cr-C nano-composite coating was 10.8 Gpa, simutaneously, the wearing resistance of the coating improved significantly compared to the steel substrate.

Investigation on the corrosion and oxidation resistance of Ni-Al2O3 nano-composite coatings prepared by sediment co-deposition

2009 ◽  
Vol 107 (1) ◽  
pp. 34-41
Author(s):  
Qiuyuan Feng ◽  
Tingju Li ◽  
Haitao Teng ◽  
Xiaoli Zhang ◽  
Yu Zhang ◽  
...  
Keyword(s):  
Oxidation Resistance ◽  
Composite Coatings ◽  
Nano Composite ◽  
Corrosion And Oxidation

Fabrication of enamel-mimicking mineralization composite coating induced by electrolytic deposition (ELD) system

2007 ◽  
Vol 1008 ◽  
Author(s):  
Yuwei Fan ◽  
Rizhi Wang ◽  
Janet Moradian-Oldak
Keyword(s):  
Calcium Phosphate ◽  
Composite Coating ◽  
Self Assembly ◽  
Tooth Enamel ◽  
Composite Coatings ◽  
The Self ◽  
Electrolytic Deposition ◽  
Phosphate Solution ◽  
Scanning Electron Micrographs ◽  
Nano Composite

AbstractMature tooth enamel does not remodel nor self-repairs after damage. Therefore, in vitro formation of a uniquely ordered composite similar to enamel is of particular interest. In this study we applied a newly developed electrolytic deposition (ELD) system to promote the amelogenin nano-chain self-assembly and simultaneous calcium phosphate crystallization. Composite coatings of amelogenin-calcium phosphate were prepared on a cathode substrate (Si wafer), from an initial pH of 4-5, and calcium and phosphorus containing solution at room temperature. The effects of a recombinant full-length amelogenin (rP172) and truncated protein without the C-terminal (rP148) on the growth and morphology of the calcium phosphate nano-composite were investigated. A potentiostat was used to control the electrochemical parameters.Following the application of electric current, the local pH around the cathode was increased and resulted in the self-assembly of amelogenin that occurred simultaneously with calcium phosphate mineralization. Transmission and scanning electron micrographs of assembled rp172 amelogenin collected from the 25mM sodium phosphate solution during electrodeposition showed uniform nanospheres and nano-chains structures, while the rP148 formed irregular aggregates. SEM observation of the surface of the nano-composite after electrodeposition, revealed organized nano-rod structures in the presence of rP172, while only nano-sized spherical aggregates were seen in the presence of rP148. ATR-IR confirmed that the mineral phases were mainly octacalcium phosphate, but apatite and amorphous calcium phosphate were also present. Nanoindentation was tested on rP172 and rP148 composite coating. The rP172 composite coating exhibited higher elastic modulus and hardness than rP148 composite. The fracture toughness of rP172 composite was comparable to mature enamel. We therefore conclude that the 24 amino acid hydrophilic C-terminal of amelogenin is essential for the self-assembly, and therefore, for calcium phosphate crystal organization. The new electro-deposition system is effective for fabrication of amelogenin/apatite composites with defined organized structures.

Investigation on the corrosion and oxidation resistance of Ni–Al2O3 nano-composite coatings prepared by sediment co-deposition

2008 ◽  
Vol 202 (17) ◽  
pp. 4137-4144 ◽  
Author(s):  
Qiuyuan Feng ◽  
Tingju Li ◽  
Haitao Teng ◽  
Xiaoli Zhang ◽  
Yu Zhang ◽  
...  
Keyword(s):  
Oxidation Resistance ◽  
Composite Coatings ◽  
Nano Composite ◽  
Corrosion And Oxidation

Preparation and Study of Novel Nano-Composite Coatings on the Surface of Plastic Moulds

2011 ◽  
Vol 311-313 ◽  
pp. 344-347
Author(s):  
Qian Wang
Keyword(s):  
Corrosion Resistance ◽  
Composite Coating ◽  
Composite Coatings ◽  
Metal Corrosion ◽  
Coating Materials ◽  
Nano Composite ◽  
Optimal Amount ◽  
Wear And Corrosion ◽  
Nano Composite Coating ◽  
Wear And Corrosion Resistance

Compared with ordinary coatings, nano-composite coating usually has a higher hardness and better wear and corrosion resistance. As coating materials, the nano-CeO2/Zn composites were prepared by nano-CeO2 and Zn powder. The microstructure was investigated by XRD and FESEM. The corrosion resistance and hardness of nano-CeO2/Zn composites with different amount of nano-CeO2 were comparatively studied. The results show that the metal corrosion resistance, hardness and density of the composites may be improved significantly by addition of nano-CeO2, and the optimal amount of nano-CeO2 is 1%.

Oxidation Resistance of Ni-Co-ZrO2 Composite Coatings

2011 ◽  
Vol 694 ◽  
pp. 799-803 ◽  
Author(s):  
Wan Chang Sun
Keyword(s):  
Carbon Steel ◽  
Composite Coating ◽  
Oxidation Resistance ◽  
Steel Substrate ◽  
Composite Coatings ◽  
Effective Area ◽  
Temperature Oxidation ◽  
Lower Weight ◽  
Ambient Oxygen ◽  
Lower Weight Gain

Ni-Co alloy and ZrO2 particles were successfully codeposited on middle carbon steel substrate by electrodeposition. The oxidation resistance was evaluated by weight gains during high temperature oxidation test. The results indicate that, when the oxidation temperature is 573 K or 873 K, middle carbon steel, Ni-Co coating and Ni-Co-ZrO2 composite coating show lower weight gain. While the temperature is up to 1173 K, Ni-Co-ZrO2 composite coating possesses better oxidation resistance than Ni-Co coating and 45 steel. The reason may be that, the dispersive ZrO2 particles in the Ni-Co matrix reduce the effective area of Ni-Co alloy contacting with ambient oxygen, and new phases like NiO and CoO further prevent inward oxygen diffusion.

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