This article describes the electroplating of ZnNi alloy from a modified deep eutectic solvent (DES), a mixture of choline chloride (ChCl) and ethylene glycol (EG) commonly known by its commercial name Ethaline. In this study the Ethaline was modified with propylene carbonate (PC) to decrease the solution viscosity. Boric acid was also used as an additive to improve surface finish and adhesion. The

Different amounts of LaB6 (0, 0.5, 1.0, 1.5, 2.0 and 2.5 wt%) were added into Ti-6Al-4V + B4C powder mixtures for fabricated TiC+TiBx reinforced titanium matrix composite coatings on Ti-6Al-4V surfaces by laser cladding processing. The effects of LaB6 addition on the phase composition, microstructure, microhardness, and wear resistance of the coatings were investigated in detail. XRD and SEM results

The 0.1Al2O3-ZrO2 reinforced MoSi2 composite coating was prepared on pure Mo substrate to improve its high-temperature oxidation resistance, of which the MoSi2 coating was prepared by a modified pack siliconizing process and subsequently the 0.1Al2O3-ZrO2 layer was generated on the as-prepared MoSi2 layer by a non-hydrolytic sol-gel method. The phase composition and microstructure of the as-prepared

The hydrophobic and corrosion resistive film of cross-linked poly(hexafluoroisopropyl methacrylate) was successfully prepared by a simple photopolymerization method. The starting materials were a monomer of 1,1,1,3,3,3-hexafluoroisopropyl methacrylate, a photoinitiator of hydroxycyclohexyl phenyl ketone, and a cross-linker of poly (ethyleneglycol diacrylate). A very simple coating technique of drop-casting

Composite oxide films containing graphite were fabricated using the anodizing technique on AA2017- T4 aluminum alloy in diluted sulfuric acid (20 wt%). This study aims to evaluate the effect of graphite on the film growth and investigate its impact on the self-lubricating ability and durability of the composite films. The growth mechanism was determined by manipulating the anodizing time while the

Low cycle fatigue (LCF) behavior of the AA7075 was studied in the solution treated-ultrasonic shot peened and the peak aged (ST-USSP-PA) condition and was compared with that of the peak aged and ultrasonic shot peened (PA-USSP) as well the peak aged-ultrasonic shot peened and stress relieved (PA-USSP-SR) condition, studied earlier. LCF tests were carried out under fully reversed axial strain control

In the present paper, rGO was coated on Ni foams (NFs) by simple physical deposition and subsequent thermal reduction method. Then, Ni3S2/MoS2 composites with different morphologies on the surface of rGO were fabricated via one-step hydrothermal route with different reaction time (18 h, 24 h, 30 h, 36 h and 42 h). It's found that the reaction time significantly affects the morphologies and electrochemical

Ultrasonic vibration assisted laser cladding processing was employed to fabricate ceramic particles reinforced Fe-based composite coatings. The influence of the ultrasonic vibration on the dilution, profile appearance, microstructure characteristics, and high temperature oxidation resistance of the composite coatings were investigated. Experimental results revealed that the profile roughness of the

In this study, we synthesized arrayed NiCoS alloys as electrode material of supercapacitors via a customized hydrothermal reaction device assisted by pulse magnetic field and studied the effect of pulse magnetic field intensity on the morphology and electrochemical performances of NiCoS alloys. The results showed that the diameter of the rod-shaped NiCoS alloys reaches its minimum value of 10 nm and

The study is devoted to examination of the features of influence of ultrasonic impact treatment (UIT) on the evolution of texture and the changes of elastic parameters in the volume of specimens of Zr1Nb alloy with preliminary-formed strong crystallographic texture. In this case the bulk-wave ultrasonic velocities (vij) in the orthogonal directions in the different sections of the specimens were measured

A strategy for the corrosion protection of porous materials using conductive polymers and nanocomposites of polymers and nanoparticle is presented. Several conductive polymers, various dopants and different electropolymerization conditions are studied to select the films with the highest corrosion resistance on porous and non-porous materials. It is found that nanocomposite films prepared from two

The high entropy nitride coatings (Cr0.35Al0.25Nb0.12Si0.08V0.20)N with high hardness of 35 GPa and a high H3/E2 of 0.52 were fabricated by RF magnetron sputtering system via tuning the processing parameters, such as substrate temperature and bias. The chemical composition, crystal structure, grain size, and residual stress were measured and analyzed to determine the mechanisms of hardness improvement

NiCoCrAlY coatings were prepared using arc-ion-plating on a second generation Ni-base single crystal superalloy, in which some of them underwent vacuum annealing treatment while the others did not. Early oxidation behavior of the two coatings, including phase pattern and morphological evolution of oxide scale during the short term oxidation, has been studied in static air at 1000 °C. The results showed

Regularities of formation of thin foils (up to 100 μm) of high-entropy alloys (HEAs) of Cr-Fe-Co-Ni-Cu system at electron beam physical vapor deposition (EB-PVD) were studied in the work. Thin foils of CrFeCoNiCu alloy were produced using a single-crucible evaporation with a constant rate of feeding of the alloy into the liquid pool. The influence of deposition temperature on the structure of the produced

In this study, the Al0.5CoCrFeNi2 high entropy alloy (HEA) powders fabricated via vacuum gas-atomization were applied to deposit two different coatings by plasma-spraying and sputtering processes. The as-atomized powders possessed an initial status of single face-centered cubic (FCC) phase, uniform element distribution and spherical shape. Further, the powders were plasma-sprayed onto stainless steels

The hardness and toughness of HfN films alloying with Ta element is crucial for their wear resistance when they are applied in the harsh environment. In this study, TaxHf1−xN (x = 0–1) thin films with various Ta contents were deposited on silicon wafer and TC4 alloy substrates by DC reactive magnetron sputtering, respectively. The relationship between structure, mechanical and tribological properties

Pulse-enhanced vacuum arc evaporation (PEVAE), an advanced version of conventional DC vacuum arc evaporation, generates a high flux of electrons to ionize more gaseous and metallic atoms in the deposition system to facilitate coating deposition. Compared to the conventional DC mode, the highly ionized plasma improves the structure and properties of the coatings deposited by the PEVAE mode. To obtain

In this report, the effect of different amounts of graphene oxide on the corrosion properties and microstructural engineering of ZnCr composite coatings were investigated and correlated. Electrodeposition of ZnCr-graphene oxide (ZnCr-GO) composite coatings was conducted over mild steel substrate using electrolyte baths with different concentrations of dispersed graphene oxide. Incorporation of GO produced

In this paper, La2O3, Gd2O3, and Yb2O3 co-doped yttria stabilized zirconia (LGYYSZ) thermal barrier coatings were prepared on a nickel-based superalloy by atmospheric plasma spraying. The phase stability, coefficient of thermal expansion (CTE), and thermal conductivity of the LGYYSZ and YSZ coatings were measured. Thermal cycling at 1400 °C was implemented to evaluate the feasibility of LGYYSZ as an

The poor self-lubricating behavior and antibacterial activity of Ti-6Al-4V alloy hinder its medical applications in surgical instruments. And thus, Ag-based transition metal nitrides nanocomposite films on Ti-6Al-4V substrate where Ag existed in the form of nanoparticles have been commonly employed to improve the above properties. In this work, two kinds of Ag-based TaN films (~3 at.% Ag) with solute

Plasma nitriding was conducted at different nitrogen ratio under the same nitriding condition of 510 °C and 4 h for AISI 4340 steel in this study, the phase constitution of nitrided layer was controlled by adjusting nitrogen ratio and its effect on wear behavior under different loads was investigated. The results showed that the phase constitution of plasma nitrided layer could be precisely controlled

An anodization/γ-glycidoxypropyltrimethoxysilane (GPTMS) composite coating was prepared via anodization, followed by a siloxane sealing treatment with and without pre-sealing to improve the corrosion resistance of the 6061 Al alloy. Hot water sealing (HWS) was used as for pre-sealing, while the spinning and dipping methods for siloxane sealing treatment were compared. The morphology, structure, and

In this study, surfaces of combustion chamber parts (cylinder head and piston) were coated with the new generation TBC (thermal barrier coating). Lanthanum Zirconate (La2Zr2O7) based ceramic top layers which have rare element additions such as Yb, Dy and Nd (in the compound of La1.4(Yb, Nd, Dy)0.6Zr2O7) had been successfully produced via APS (Atmospheric plasma spray) method in a double layered design

Global corrosion damages mandate the synthesis of superhydrophobic, self-cleaning protective surfaces possessing excellent mechanical, chemical, and thermal stability. Thus, a self-cleaning, superhydrophobic carbon nanofiber (CNF) coating on structural alloys AISI 1020 mild steel (MS) and Mg alloy (AZ31) with water contact angle (CA) 145°–150° and sliding angle of 7° ± 2° is fabricated by a novel two-step

The AlCrN, CrBN and AlCrBN coatings were deposited on Ti6Al4V alloy by cathodic vacuum arc with powder-metallurgical targets. The phase structures, surface and cross-sectional microstructures, mechanical and tribological properties of these coated samples were comparatively studied. The results show that the B-containing coatings consist of fcc solid solution embedded into a-BN/CrB amorphous phases

A Ni-20 wt% Sn coating was deposited by the cold spraying method on steel substrate. The thickness of the deposited coating was approximately 50 μm and porosity was <1%. The coating microstructure consisted of a Ni solid solution with the presence of various intermetallics, which was confirmed by x-ray diffraction and electron microscopy. Stress-strain behaviour of this coating, both in planar and

Magnesium (Mg) alloys have shown great potential for biomedical implant materials due to their biodegradability and suitable mechanical strength. Recent works have shown that biomedical Mg alloys suffered from accelerated degradation rates when exposed to a stressed condition in biological media. Therefore, it is necessary to endow Mg alloys with enhanced stress corrosion cracking resistance. In this

The electroless Ni-Mo-P/Ni-P composite coating was applied on N80 carbon steel, and the effects of Mo addition and heat treatment on the corrosion resistance enhancement in CO2/H2S/Cl− brine were studied by electrochemical measurements and surface analysis techniques. The Mo addition in the as-deposited Ni-P coating causes the microstructural transformation from amorphous to crystalline due to the

There is an urgent need to develop multifunctional titanium (Ti)-based bone implants exhibiting osteogenic, anti-oncogenic, and antibacterial properties in patients undergoing bone cancer resection. Herein, we explored the use of a micro-arc oxidation approach to generate Ti substrates coated with microporous titanium dioxide (TiO2) coatings containing fixed Ca and P contents (TO) but different levels

The TiN coating and Ti/TiN multilayer coatings were successfully fabricated on Ti6Al4V alloy by multi-arc ion plating. The Ti/TiN multilayer coatings with a total thickness of 4.6 μm and the TiN coating were prepared with a thickness of 5.6 μm. The XRD results indicate that the TiN phase of Ti/TiN multilayer coatings has a face-centered cubic crystal with the strong preferred orientation of (111) while

HfB2-MoSi2/SiC-Si coating was fabricated via pack cementation (PC) combined with slurry painting (SP) followed by heat treatment, where MoSi2 was in-situ synthesized from Mo and Si. The microstructure evolution and high-temperature oxidation resistance at 1773 K and 1973 K of the HfB2-MoSi2/SiC-Si coated specimens were comparatively studied. The protection mechanism of the coating was investigated

Alkali-heat treatment (AHT) is an effective surface treatment technology for improving the bioactivity of medical metal biomaterials. However, the effects of AHT on the biocompatibility of the original material are not yet fully clear. Accordingly, in the present study, tantalum (Ta) coatings are deposited on Ti6Al4V substrates using a vacuum plasma spraying (VPS) technique and the coatings are then

The properties of the “nitrogen expanded ferrite” or αN phase have been scarcely studied to date. This phase was obtained here on a super ferritic stainless steel (SFSS) by plasma immersion ion implantation (PIII), which is a suitable technique to produce near to surface modifications on the FeCr alloys due to the control of energy delivered to the surface. The UNS S44400 SFSS, a special alloy developed

Acid slurry for washcoating tends to cause acid pollution on substrate and active components and even reduces the loading capacity. To solve the problems, washcoat of γ-Al2O3 on FeCrAl mesh was prepared with acid-free slurry in this study. Effects of additives on loading and adhesive property were investigated. The macromorphology, microstructure, phase constituents, pore characteristics and adhesive

A silver shell‑copper core coating was applied on additively manufactured (AM) AlSi10Mg alloy to improve the electrical conductivity, corrosion resistance, surface roughness and indentation hardness. Surface microstructure evolution and roughness of the AM alloy, i.e. as-built, during the subsequent processes, such as heat treatment, shot peening and AgCu coating, were comprehensively characterized

Protection of ureteral stents against infections is a significant current challenge raised by increasing the number of stentings and infections, microbial resistance to conventional antibiotics and multi-drugs treatments, side effects for the patients like damage of surrounding tissue and high morbidity. Surface engineered biomaterials and ureteral stents, reducing biofilm formation and encrustation

The multilayer gradient TiN/Ti coating was deposited by using filtered cathodic vacuum arc (FCVA) deposition method. The laser shock peening (LSP) process was carried out before deposition. The surface morphology, mechanical properties were measured by atomic force microscope (AFM), nanoindentation and scratch tester. The fatigue strength was investigated on a vibration test platform and the fracture

In high power impulse magnetron sputtering (HiPIMS) discharge, the cathode sheath is a particularly vital section which determines the spatial distribution of electric field and the energy and transport of charged particles. In this work, a single Langmuir probe is employed to explore the effects of dynamic cathode sheath on electron transport at the initial period of HiPIMS pulse. Measurements show

Alloy steel 17Cr2NiSiMo coatings with small amounts (<1 wt%) of added Y2O3 nanoparticles are fabricated by plasma-transferred arc. The combined effect of the Y2O3 nanoparticles and Si-oxide second-phase particles on microstructure, sliding wear resistance, and wear weight loss of the alloy steel coating are investigated. The Y content in the spherical Si-oxide particles is found to increase with the

Using the principle of electrochemical additive manufacturing (ECAM), a nanocrystalline NiCo binary alloy coating was prepared on the surface of the steel substrate. This study shows the pulse-shaped current-time curve of ECAM during the coating preparation process, and the nanocrystalline NiCo coating has a regular multilayer structure. At the same time, the ECAM method can effectively limit the growth

This study is aimed towards a better understanding of the tribological performance of the optimized Mo-Se-C dry lubricant coatings. The coatings are deposited with a lower carbon content (< 30 at. %), as compared to the literature. The detailed analysis of the wear track and the tribolayer evolution as a function of the C content and the number of sliding cycles is discussed, using Raman spectroscopy