scholarly journals Synthesis of TiB2-Ni3B nanocomposite coating by DC magnetron sputtering for corrosion-erosion protection

2021 ◽  
Author(s):  
Jorge Morales Hernández ◽  
Jose Manuel Juárez ◽  
Raul Herrera Basurto ◽  
Héctor Herrera Hernández ◽  
Héctor Javier Dorantes Rosales
Keyword(s):  
Magnetron Sputtering ◽  
Room Temperature ◽  
Annealing Treatment ◽  
Wear Test ◽  
Nanocomposite Coating ◽  
Plastic Behavior ◽  
Dc Magnetron Sputtering ◽  
Force Microscopy ◽  
Atomic Force ◽  
Solid Cathode

Abstract Significant contribution on corrosion-erosion resistance of Ni3B-TiB2 nanocomposite coating of 1µm of thickness, deposited by DC magnetron Sputtering on stainless steel 304 substrates was studied. Nickel phase (γ Ni) plus Ni3B-TiB2 phases were synthesized previously by Mechanical Alloying (MA). Solid cathode (76.2 mm of diameter and 3 mm of thickness) used to grow thin films was manufactured with the alloyed powders, applying a uniaxial load of 70 MPa at room temperature and sintered at 900° C for two hours. Microstructure and mechanical properties of the coatings were characterized by X-Ray diffraction (XRD), scanning electron microscopy (SEM), atomic force microscopy (AFM), nanoindentation, and wear test with a ball-on-disc tribometer. Compact coating of Ni3B-TiB2 with a microstructure of prismatic crystals after annealing treatment, showing a uniform coating with good adherence and low friction coefficient of 0.5, correlated with a low roughness of Ra ≈ 0.0439±0.0069 µm. The average hardness of 537.4 HV (5265.0 MPa) and wear coefficient at room temperature of 2.552E-10 m2N-1 correspond with medium-hard phases with an elastic-plastic behavior suitable for fatigue applications. Geothermal fluid modified was synthesized in the lab with NaCl/Na2SO4 to evaluate the corrosion resistance of the films in a standard three electrodes cell, characterizing a corrosion rate of 0.0008 and 0.001 mm*year-1 at 25 and 80°C respectively during 86.4 ks (24 h) of exposition; showing a resistive coating without corrosion products and with good response to the geothermal environment.

The Study of Al-N Codoped ZnO Thin Films Prepared by DC Magnetron Sputtering

2015 ◽  
Vol 754-755 ◽  
pp. 591-594
Author(s):  
Haslinda Abdul Hamid ◽  
M.N. Abdul Hadi
Keyword(s):  
Magnetron Sputtering ◽  
Structural Investigation ◽  
Annealing Treatment ◽  
X Ray Diffraction ◽  
Dc Magnetron Sputtering ◽  
X Ray ◽  
Force Microscopy ◽  
Atomic Force ◽  
Oxygen Gas ◽  
Film Roughness

The codoped ZnO thin film were deposited by DC magnetron sputtering on silicon (111) followed by annealing treatment at 200 °C and 600 °C for 1 hour in nitrogen and oxygen gas mixture. Structural investigation was carried out by scanning electron microscopy (SEM), atomic force microscopy and x-ray diffraction (XRD). Film roughness and grain shape were found to be correlated with the annealing temperatures.

scholarly journals Effect of the annealing temperature on the structural properties of hafnium nanofilms by magnetron sputtering

2021 ◽  
Vol 2064 (1) ◽  
pp. 012071
Author(s):  
Thant Sin Win ◽  
A P Kuzmenko ◽  
V V Rodionov ◽  
Min Myo Than
Keyword(s):  
Magnetron Sputtering ◽  
Room Temperature ◽  
Annealing Temperature ◽  
Hafnium Dioxide ◽  
X Ray ◽  
Force Microscopy ◽  
Si Substrates ◽  
Lattice Strains ◽  
Atomic Force ◽  
Different Temperatures

Abstract In this work investigated the effect of the annealing temperature on hafnium nanofilms obtained by DC magnetron sputtering on Si substrates. The nanofilms annealed through 100°C to 700°C by a High-Temperature Strip Heater Chambers (HTK-16N) on an X-ray Diffractometer (XRD). The microstructure and morphology of the films at different temperatures were investigated by XRD, Scanning Electron Microscopy (SEM), Atomic Force Microscopy (AFM) and Raman Microspectrometer (RS). It was found that annealing affects changes in the lattice strains, texture, grain size, and roughness of Hf nanofilms. According to XRD data, the structure of the thin films showed amorphous from room temperature to 100°C and starting from a temperature of 200°C were changed crystallization. At 500°C a monoclinic structure corresponding to hafnium dioxide HfO2was formed in hafnium nanofilms.

SiC Coatings Deposited by RF Magnetron Sputtering

2007 ◽  
Vol 280-283 ◽  
pp. 1309-1312 ◽  
Author(s):  
Hui Dong Tang ◽  
Shou Hong Tan ◽  
Zheng Ren Huang
Keyword(s):  
Surface Roughness ◽  
Magnetron Sputtering ◽  
Room Temperature ◽  
Rf Magnetron Sputtering ◽  
Rf Power ◽  
Force Microscopy ◽  
Atomic Force ◽  
Amorphous Sic ◽  
Surface Morphologies ◽  
Sic Coatings

Amorphous SiC coatings were deposited by RF magnetron sputtering from a sintered SiC target onto Si(100) substrate at room temperature. The influence of RF power on the surface morphology and the RMS surface roughness of the resulting SiC coatings was studied by using atomic force microscopy. Two types of surface morphologies were obtained. The corresponding forming mechanisms were also discussed.

INVESTIGATION OF THE PROPERTIES OF SILVER THIN FILMS DEPOSITED BY DC MAGNETRON SPUTTERING

2016 ◽  
Vol 24 (04) ◽  
pp. 1750053 ◽  
Author(s):  
LINWEN WANG ◽  
LING LI ◽  
WEI-DONG CHEN
Keyword(s):  
Thin Films ◽  
Surface Morphology ◽  
Magnetron Sputtering ◽  
Sheet Resistance ◽  
Optical Transmittance ◽  
Localized Surface Plasmon ◽  
Dc Magnetron Sputtering ◽  
Force Microscopy ◽  
Atomic Force ◽  
Sputtering Power

In this paper, we studied the surface morphology of silver (Ag) thin films deposited on glass substrate by using the DC magnetron sputtering with various power conditions at room temperature. The surface morphology, the optical and electrical properties were measured by AFM (Atomic Force Microscopy), UV–Vis Spectrophotometer (Lambda 950), and the four-probe method (RTS-9, Four Probes Technology). The effect of the sputtering power on the root-mean-square (RMS) surface roughness of Ag thin films was analyzed. The experiment results showed that the RMS value was lowest in the range from 60[Formula: see text]W to 80[Formula: see text]W. At the same time, the effect of the thickness on optical transmittance and sheet resistance was also investigated. We found the rough surface was prejudiced to inducing sheet resistance and enhancing the optical transmittance when the thickness of Ag thin films was thin. In addition, the excitation of the localized surface plasmon resonance (LSPR) was due to Ag nanoparticles (NPs) based on the analysis of the FDTD (finite-difference time-domain) simulation.

scholarly journals Providing a Specified Level of Electromagnetic Shielding with Nickel Thin Films Formed by DC Magnetron Sputtering

Coatings ◽  
2021 ◽  
Vol 11 (12) ◽  
pp. 1455
Author(s):  
Oleg A. Testov ◽  
Andrey E. Komlev ◽  
Kamil G. Gareev ◽  
Ivan K. Khmelnitskiy ◽  
Victor V. Luchinin ◽  
...  
Keyword(s):  
Thin Films ◽  
Magnetron Sputtering ◽  
Silicon Substrates ◽  
Shielding Effectiveness ◽  
Dc Magnetron Sputtering ◽  
Nickel Films ◽  
Force Microscopy ◽  
Nickel Thin Films ◽  
Atomic Force ◽  
Theoretical Assessment

Nickel films of 4–250 nm thickness were produced by DC magnetron sputtering onto glass and silicon substrates. The electrical properties of the films were investigated by the four-probe method and the surface morphology of the films was studied by atomic force microscopy. To measure the shielding effectiveness, a portable closed stand based on horn antennas was used. A theoretical assessment of the shielding effectiveness of nickel films of various thickness under electromagnetic radiation of a range of frequencies was carried out using two different approximations. The results demonstrate the shielding effectiveness of up to 35 dB of the nickel thin films in the frequency range of 2–18 GHz.

Cryogenic atomic force microscopy

1991 ◽  
Vol 49 ◽  
pp. 54-55
Author(s):  
K. A. Fisher ◽  
M. G. L. Gustafsson ◽  
M. B. Shattuck ◽  
J. Clarke
Keyword(s):  
Room Temperature ◽  
Rapid Freezing ◽  
Cryogenic Temperatures ◽  
Soft Or ◽  
Electrically Conductive ◽  
Force Microscopy ◽  
Flexible Molecules ◽  
Advantages And Disadvantages ◽  
Atomic Force ◽  
Chemical Perturbation

The atomic force microscope (AFM) is capable of imaging electrically conductive and non-conductive surfaces at atomic resolution. When used to image biological samples, however, lateral resolution is often limited to nanometer levels, due primarily to AFM tip/sample interactions. Several approaches to immobilize and stabilize soft or flexible molecules for AFM have been examined, notably, tethering coating, and freezing. Although each approach has its advantages and disadvantages, rapid freezing techniques have the special advantage of avoiding chemical perturbation, and minimizing physical disruption of the sample. Scanning with an AFM at cryogenic temperatures has the potential to image frozen biomolecules at high resolution. We have constructed a force microscope capable of operating immersed in liquid n-pentane and have tested its performance at room temperature with carbon and metal-coated samples, and at 143° K with uncoated ferritin and purple membrane (PM).

scholarly journals Corrosion Behavior and Mechanical Properties of a Nanocomposite Superhydrophobic Coating

Coatings ◽  
2021 ◽  
Vol 11 (6) ◽  
pp. 652
Author(s):  
Divine Sebastian ◽  
Chun-Wei Yao ◽  
Lutfun Nipa ◽  
Ian Lian ◽  
Gary Twu
Keyword(s):  
Electron Microscopy ◽  
Mechanical Properties ◽  
Scanning Electron Microscopy ◽  
Atomic Force Microscopy ◽  
Nanocomposite Coating ◽  
Superhydrophobic Coating ◽  
Force Microscopy ◽  
Atomic Force ◽  
Microscopy Images ◽  
Scanning Electron

In this work, a mechanically durable anticorrosion superhydrophobic coating is developed using a nanocomposite coating solution composed of silica nanoparticles and epoxy resin. The nanocomposite coating developed was tested for its superhydrophobic behavior using goniometry; surface morphology using scanning electron microscopy and atomic force microscopy; elemental composition using energy dispersive X-ray spectroscopy; corrosion resistance using atomic force microscopy; and potentiodynamic polarization measurements. The nanocomposite coating possesses hierarchical micro/nanostructures, according to the scanning electron microscopy images, and the presence of such structures was further confirmed by the atomic force microscopy images. The developed nanocomposite coating was found to be highly superhydrophobic as well as corrosion resistant, according to the results from static contact angle measurement and potentiodynamic polarization measurement, respectively. The abrasion resistance and mechanical durability of the nanocomposite coating were studied by abrasion tests, and the mechanical properties such as reduced modulus and Berkovich hardness were evaluated with the aid of nanoindentation tests.

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