Influence of polyetheretherketone coatings on the Ti–13Nb–13Zr titanium alloy's bio-tribological properties and corrosion resistance

2016 ◽  
Vol 63 ◽  
pp. 52-61 ◽  
Author(s):  
Anita Sak ◽  
Tomasz Moskalewicz ◽  
Sławomir Zimowski ◽  
Łukasz Cieniek ◽  
Beata Dubiel ◽  
...  
Keyword(s):  
Corrosion Resistance ◽  
Tribological Properties

scholarly journals Structure, Corrosion Resistance, Mechanical and Tribological Properties of ZrB2 and Zr-B-N Coatings

Metals ◽  
2021 ◽  
Vol 11 (8) ◽  
pp. 1194
Author(s):  
Philipp Kiryukhantsev-Korneev ◽  
Alina Sytchenko ◽  
Yuriy Kaplanskii ◽  
Alexander Sheveyko ◽  
Stepan Vorotilo ◽  
...  
Keyword(s):  
Corrosion Resistance ◽  
Tribological Properties ◽  
Current Density ◽  
Corrosion Current Density ◽  
Elastic Recovery ◽  
Optical Emission ◽  
Corrosion Current ◽  
Impact Testing ◽  
Total Oxidation ◽  
Mechanical And Tribological Properties

The coatings ZrB2 and Zr-B-N were deposited by magnetron sputtering of ZrB2 target in Ar and Ar–15%N2 atmospheres. The structure and properties of the coatings were investigated via scanning and transmission electron microscopy, energy dispersion analysis, optical profilometry, glowing discharge optical emission spectroscopy and X-ray diffraction analysis. Mechanical and tribological properties of the coatings were investigated using nanoindentation, “pin-on-disc” tribological testing and “ball-on-plate” impact testing. Free corrosion potential and corrosion current density were measured by electrochemical testing in 1N H2SO4 and 3.5%NaCl solutions. The oxidation resistance of the coatings was investigated in the 600–800 °С temperature interval. The coatings deposited in Ar contained 4–11 nm grains of the h-ZrB2 phase along with free boron. Nitrogen-containing coatings consisted of finer crystals (1–4 nm) of h-ZrB2, separated by interlayers of amorphous a-BN. Both types of coatings featured hardness of 22–23 GPa; however, the introduction of nitrogen decreased the coating’s elastic modulus from 342 to 266 GPa and increased the elastic recovery from 62 to 72%, which enhanced the wear resistance of the coatings. N-doped coatings demonstrated a relatively low friction coefficient of 0.4 and a specific wear rate of ~1.3 × 10−6 mm3N−1m−1. Electrochemical investigations revealed that the introduction of nitrogen into the coatings resulted in the decrease of corrosion current density in 3.5% NaCl and 1N H2SO4 solution up to 3.5 and 5 times, correspondingly. The superior corrosion resistance of Zr-В-N coatings was related to the finer grains size and increased volume of the BN phase. The samples ZrB2 and Zr-B-N resisted oxidation at 600 °C. N-free coatings resisted oxidation (up to 800 °С) and the diffusion of metallic elements from the substrate better. In contrast, Zr-B-N coatings experienced total oxidation and formed loose oxide layers, which could be easily removed from the substrate.

Electroless Nickel-Phosphorus Composite Coatings

2016 ◽  
Vol 6 (1) ◽  
pp. 14-50 ◽  
Author(s):  
Prasanna Gadhari ◽  
Prasanta Sahoo
Keyword(s):  
Corrosion Resistance ◽  
Tribological Properties ◽  
Composite Coatings ◽  
Electroless Nickel ◽  
Friction Behavior ◽  
Factors Affecting ◽  
Conductive Materials ◽  
Mechanical And Tribological Properties ◽  
Coating Methods ◽  
Soft Particles

Electroless nickel composite coatings possess excellent mechanical and tribological properties such as, hardness, wear and corrosion resistance. Composite coatings can easily be coated not only on electrically conductive materials but also on non-conductive materials like as fabrics, plastics, rubber, etc. This review emphasizes on the development of electroless nickel composite coatings by incorporating different types of hard/soft particles (micro/nano size) in the electroless Ni-P matrix to improve the mechanical and tribological properties of the coatings. The preparation of electroless bath for nickel-phosphorus composite coating, methods to incorporate hard and/or soft particles in the bath, factors affecting the particle incorporation in the coating and its effect on coating structure, hardness, wear resistance, friction behavior, corrosion resistance, and mechanical properties are discussed thoroughly.

Effect of different post-treatments on the corrosion resistance and tribological properties of AZ91D magnesium alloy coated PEO

2015 ◽  
Vol 278 ◽  
pp. 99-107 ◽  
Author(s):  
A. Castellanos ◽  
A. Altube ◽  
J.M. Vega ◽  
E. García-Lecina ◽  
J.A. Díez ◽  
...  
Keyword(s):  
Corrosion Resistance ◽  
Magnesium Alloy ◽  
Tribological Properties ◽  
Az91d Magnesium Alloy

Influence of the Organic Additions on Structure, Corrosion Resistance and Tribological Properties of Ni/Al2O3 Composite Coatings

2013 ◽  
Vol 765 ◽  
pp. 663-667
Author(s):  
Marek Nowak ◽  
Mieczysław Opyrchał ◽  
Sonia Boczkal ◽  
Janusz Żelechowski
Keyword(s):  
Corrosion Resistance ◽  
Tribological Properties ◽  
Composite Coatings ◽  
Electrochemical Behaviour ◽  
Wear Test ◽  
Standard Test ◽  
Properties Of Coatings ◽  
Corrosion Properties ◽  
X Ray ◽  
Xrd Techniques

Composite Ni/Al2O3 coatings were electrochemically deposited from a Watts bath modified with the organic additions of dioctyl sulphosuccinate sodium salt C20H37NaO7S–(DSS) and 2,3-dihydroxy-1,2 benzisothiazol-3-one 1,1-dioxide C7H5NO3–(LSA). The effect of different amount (50 and 100 g/l) of Al2O3 powder and organic additions on microstructure, microhardness, corrosion resistance and tribological properties was investigated. The coatings were examined by optical microscopy, scanning electron microscopy (SEM), energy dispersive X-ray analysis (EDX) and X-ray diffraction (XRD) techniques. The electrochemical behaviour of the coatings in corrosive solutions (1 M NaCl and 1 M Na2SO4) was investigated by potentiodynamic polarisation. The tribological properties were investigated by the Taber abrasive wear test, a standard test often applied in industrial practice. The results show that Al2O3 particles are uniformly distributed in the composite coatings compared with coatings without organic additions. The addition of organic compounds also reduced the size of the forming nickel crystallites and improved the tribological and corrosion properties of coatings containing the dispersed hard particles of Al2O3 added in an amount of 50 g/l and the addition of organic LSA and DSS compounds.

scholarly journals Tribological Properties and Corrosion Resistance of Porous Structure Ni-Mo/ZrO2 Alloys

Coatings ◽  
2020 ◽  
Vol 10 (8) ◽  
pp. 767
Author(s):  
Ning Li ◽  
Hong Xu ◽  
Xinhui Li ◽  
Weizeng Chen ◽  
Lijuan Zheng ◽  
...  
Keyword(s):  
Corrosion Resistance ◽  
Tribological Properties ◽  
Salt Water ◽  
Composite Coatings ◽  
Wear Test ◽  
High Hardness ◽  
Zro2 Nanoparticles ◽  
Zro2 Content ◽  
Corrosion Properties ◽  
Alloy Matrix

Ni-Mo-ZrO2 composite coatings were produced by pulse electrodeposition technique from alkaline electrolytes containing dispersed ZrO2 nanopowder. The structure, microhardness, corrosion properties and tribological properties of Ni-Mo-ZrO2 composites with different content of molybdenum and ZrO2 have also been examined. Structural characterization was performed using X-ray diffraction (XRD) and a scanning electron microscope (SEM). It was found that an increase in molybdate concentration in the electrolyte affects the microstructure, microhardness, corrosion properties and tribological properties of the amount of co-deposited ZrO2 nanoparticles. The incorporation of ZrO2 nanoparticles into the Ni-Mo alloy matrix positively affects the microhardness and also slightly improves the corrosion properties of Ni-Mo alloy coatings. In addition, both the coefficient of friction and the salt-water lubrication sliding wear rate of Ni-Mo-ZrO2 coatings decreased with increasing the ZrO2 content. Wear test and corrosion resistance test results indicated that the intermetallic composite had an excellent wear-resistance and corrosion resistance at room-temperature, which is attributed to the high hardness and strong atomic bonding of constituent phases Ni-Mo and polarization effect of ZrO2 nanoparticles.

scholarly journals Effect of physical and chemical factors, arising in elements of implantation systems, on central screws of heads at rehabilitation of patients in orthopedic dentistry clinic

2020 ◽  
Vol 4 (34) ◽  
pp. 35-39
Author(s):  
S. G. Nikitin ◽  
Yu. Yu. Pervov ◽  
R. A. Saleev ◽  
M. A. Amkhadova
Keyword(s):  
Wear Resistance ◽  
Corrosion Resistance ◽  
Phase Composition ◽  
Surface Structure ◽  
Functional Properties ◽  
Tribological Properties ◽  
Biological Media ◽  
Relevant Today ◽  
Chemical Factors ◽  
Physical And Chemical

This article is devoted to the question of one of the remote complications in dental implantology — fracture of the central screw of the abutment. Systematic studies of the influence of chemical and phase composition, volume and surface structure of products from titanium-based alloys on the functional properties of the «implant-screw-abutment» system, including corrosion resistance in biological media, have not been carried out. Therefore, the problem of establishing patterns of influence of these factors on the corrosion resistance of the elements of implantation systems, namely the central screw, and the study of its tribological properties (wear resistance), are relevant today.

Tribological Properties and Corrosion Resistance Properties of NbN/TiN Multilayer, TiNb-NX Single-Layer and Coatings that are Doped with Carbon

2021 ◽  
Vol 901 ◽  
pp. 208-218
Author(s):  
Kun Lin Kuo ◽  
Yen Liang Su ◽  
Wen Hsien Kao ◽  
Yin Hsiang Mao ◽  
Tang Wei Liang
Keyword(s):  
Corrosion Resistance ◽  
Wear Rate ◽  
Tribological Properties ◽  
Solid Lubricant ◽  
Single Layer ◽  
Rf Magnetron Sputtering ◽  
Corrosion Current ◽  
Multilayer Coatings ◽  
Pitting Potential ◽  
Aisi 52100

NbN/TiN, TiNb-NX and CH-TiNb-N12 coatings are deposited by RF magnetron sputtering to determine the tribological properties and corrosion resistance. ‘x’ is the flux rate for nitrogen and ‘CH’ signifies the addition of acetylene. In terms of the corrosion resistance, all the coatings have a similar corrosion potential and NbN/TiN multilayer coatings exhibit the lowest corrosion current. The NbN/TiN multilayer has a low pitting potential so severe pitting corrosion is observed on the surface. CH-TiNb-N12 coating is most resistant to corrosion and exhibits no pitting before the test ends. In contact with counter-bodies with a Si3N4 ball or an AISI 52100 ball, a CH-TiNb-N12 coating acts as a solid lubricant so the wear mechanism shows the least abrasion. The CH-TiNb-N12 coating has the lowest wear rate and coefficient of friction for sliding against Si3N4 and AISI 52100 balls. The wear rate is respectively 3.2 and 6.8 times less than that for SKH51 substrate when sliding against Si3N4 and AISI 52100 balls. The results for this study show that a TiNb-N12-CH coating has the best tribological properties and corrosion resistance.

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