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Effects of tungsten carbide thermal spray coating by HP/HVOF and hard chromium electroplating on AISI 4340 high strength steel
(2001-04-16)
In cases of decorative and functional applications, chromium results in protection against wear and corrosion combined with chemical resistance and good lubricity. However, pressure to identify alternatives or to improve ...
Fatigue Performance of AISI 4340 Steel Ni-Cr-B-Si-Fe HVOF Thermal Spray Coated
(2015-01-01)
Coatings are deposited on high strength materials to improve the surface degradation resistance of several elements. As a consequence, the fatigue strength of coated materials is significantly influenced by internal residual ...
Sol-gel based calcium phosphates coating deposited on Co-Cr-Ni-Mo alloys modified by laser beam irradiation for cardiovascular devices
(Elsevier B.V., 2019-01-01)
Co-Cr-Ni-Mo alloy samples were irradiated by pulsed Yb: YAG laser beam under air and atmospheric pressure. Calcium phosphate coatings were deposited on the irradiated surfaces by the sol-gel method. The sol was prepared ...
AISI 4140 Steel Fatigue Performance: Cd Replacement by Electroplated Zn-Ni Alloy Coating
(2020-03-01)
The fatigue behavior of electrodeposited Zn-Ni alloy coating was investigated for its suitability to replace Cd coatings in AISI 4140 steel studs applied in oil and gas industries due to environmental and human health ...
Estudo de compostos cerâmicos para utilização em coatings de alta emissividade
(Universidade Federal de São CarlosUFSCarPrograma de Pós-Graduação em Ciência e Engenharia de Materiais - PPGCEMCâmpus São Carlos, 2016-02-05)
The constant search for means to reduce the energetic consumption
motivates the use of high emissivity ceramic coatings in many high temperature
applications. Its use aims to increase heat transfer efficiency by radiation ...
Hydroxyapatite and β-TCP modified PMMA-TiO2 and PMMA-ZrO2 coatings for bioactive corrosion protection of Ti6Al4V implants
(2020-11-01)
Organic-inorganic hybrid coatings deposited on different types of metallic alloys have shown outstanding anticorrosive performance. The incorporation of osteoconductive additives such as hydroxyapatite (HA) and β-tricalcium ...
Bone response to porous alumina implants coated with bioactive materials, observed using different characterization techniques
(Wichtig Publishing, 2017-07-01)
Background: Implants or implantable devices should integrate into the host tissue faster than fibrous capsule formation, in which the design of the interface is one of the biggest challenges. Generally, bioactive materials ...
Corrosion protection of chromium-coated steel by hybrid sol-gel coatings
(Elsevier B.V., 2016-08-15)
The aim of this study was to investigate the effect of the amount of tetraethyl orthosilicate (TEOS) on the corrosion protection of chromium-coated steel (CCS) by poly(methyl methacrylate)-co-(trimethoxysilyl)propyl ...
Effect of silica coating on the catalytic activity of maghemite nanoparticles impregnated into mesoporous silica matrix
(2019-03-01)
The search for more efficient catalysts and less polluting and less costly reagents has made heterogeneous catalysis one of the most advantageous processes in this scenario. In this work, recoverable heterogeneous catalysts ...
Design and applications of structured catalytic supports synthesized by coating in spherical geometry: a review
(Nova Science Publishers, 2020)
The methods used to synthesize structured catalytic supports by coating in spherical geometry are reviewed. The different procedures are influenced by the pretreatments of the substrate, the deposition technique of the ...