Dry friction of ceramic materials based on zirconium dioxide on hard chromium coating

2021 ◽  
Author(s):  
Valery Alisin
Keyword(s):  
Dry Friction ◽  
Zirconium Dioxide ◽  
Ceramic Materials ◽  
Chromium Coating ◽  
Hard Chromium

Effect of PEG addition and temperature on hard chromium coating using eco-friendly trivalent chromium

2020 ◽  
Author(s):  
Aditianto Ramelan ◽  
Akmal Fauzi ◽  
Riska Rachmantyo ◽  
Firmansyah Sasmita ◽  
Lidya ◽  
...  
Keyword(s):  
Trivalent Chromium ◽  
Chromium Coating ◽  
Hard Chromium

Thermomechanical Analysis as a Tool for Optimizing Sintering Regimes for Ceramic Materials based on Zirconium Dioxide

2013 ◽  
Vol 54 (4) ◽  
pp. 307-311 ◽  
Author(s):  
S. E. Porozova ◽  
V. B. Kul’met’eva ◽  
A. A. Gurov ◽  
D. S. Vokhmyanin
Keyword(s):  
Zirconium Dioxide ◽  
Ceramic Materials ◽  
Thermomechanical Analysis

Aspects of Applying Hard Chromium Coatings on the Inner Surfaces of Components for Hydraulic Drives with Hydrostatic Guideways

2021 ◽  
Vol 316 ◽  
pp. 827-832
Author(s):  
D. V. Ardashev ◽  
L.V. Shipulin ◽  
A.S. Degtyareva-Kashutina
Keyword(s):  
Hydraulic Cylinder ◽  
Chromium Coating ◽  
Optimal Composition ◽  
Chromic Anhydride ◽  
Corrosion Resistant ◽  
Distinctive Features ◽  
Wear Resistant Coatings ◽  
Hard Chromium ◽  
Chromium Plating ◽  
Plating Method

We considered the processes of chromium plating the inner surfaces of the components of cylinders with hydrostatic guideways. We demonstrated the various aspects of the chromium plating process – the limitations placed on the machinery depending on the dimensions of the parts to be plated and the unevenness of the deposition rate of chromium along the length of the part. We developed a diagram of an installation for the application of a hard chromium coating on inner surfaces, which includes a cathode, an anode, a tank, and a pipeline. The distinctive features of the installation are the method of supplying the electrolyte at an angle to the horizontal, which allows us to supply the electrolyte through a turbulent flow swirling along a helical path, and the use of a chromium-plated installation casing. We studied various modes for applying a hard chromium coating on the inner surfaces of a hydraulic cylinder. As a result, we determined the optimal composition of the chromium electrolyte – the ratio of chromic anhydride and sulfuric acid – which is 10:1, respectively, and experimentally selected deposition modes. Chromium coatings obtained through the use of the concentrated electrolyte, which we developed, and the chromium plating method have 5...20% greater hardness and a 10...30-times reduction in porosity with the formation of a shiny, lumpy sludge, which corresponds to corrosion-resistant and wear-resistant coatings needed to manufacture hydraulic drives with highly efficient hydrostatic guideways.

scholarly journals On the tensile behaviors of a hard chromium coating plated on a steel substrate with periodic subsurface inclusions

2007 ◽  
Vol 201 (18) ◽  
pp. 7699-7705 ◽  
Author(s):  
Chen-Wu Wu ◽  
Ban-Quan Yang ◽  
Guang-Nan Chen ◽  
Kun Zhang ◽  
Jing-Hua Xiao
Keyword(s):  
Steel Substrate ◽  
Chromium Coating ◽  
Hard Chromium

Tribology research of the turned zirconium-dioxide ceramics

2012 ◽  
Vol 3 (3) ◽  
pp. 181-190
Author(s):  
G. Fledrich ◽  
R. Keresztes ◽  
L. Zsidai
Keyword(s):  
Friction Coefficient ◽  
Friction Force ◽  
Dry Friction ◽  
Zirconium Dioxide ◽  
Steel Specimen ◽  
Friction Condition ◽  
Normal Direction ◽  
Basic Material ◽  
Series Production ◽  
Ceramic Specimen

The zirconium dioxide as basic material is suitable to machine by tool with regular edge derivingfrom lower ceramic hardness and from other characteristics so in case of piece production or small – andmedium series production, at quick prototype production can become potential material alike. The aims tocompare the arising frictional characteristics in case of dry friction condition in case of ceramic – steelsurface pairs machined with different sets. We have developed for an equipment to carry out tribologicaltests. During the test we pressure the steel counter face with determined normal direction force thecasing surface of the rotating ceramic specimen and in the meantime we measure the value of the frictionforce with force meter cell. We have calculated the friction coefficient characterizing the system from thenormal direction force and the friction force as well as we measured the wear of the steel specimen andits deformation.

Improvement of Surface Characteristics by Electroplating Hard Chromium Coating Post Treated by Nanocrystalline Plasma Electrolytic Carbonitriding

2009 ◽  
Vol 6 (S1) ◽  
pp. S297-S301 ◽  
Author(s):  
Seyed Haman Hedayat Mofidi ◽  
Mahmood Aliofkhazraei ◽  
Alireza Sabour Rouhaghdam ◽  
Ehsan Ghobadi ◽  
Ehsan Mohsenian
Keyword(s):  
Surface Characteristics ◽  
Chromium Coating ◽  
Hard Chromium ◽  
Plasma Electrolytic

Al2O3 AND ZrO2 CERAMIC MATERIALS OBTAINED BY SOL-GEL METHOD

2021 ◽  
pp. 61-73
Author(s):  
Yu.E. Lebedeva ◽  
◽  
N.E. Shchegoleva ◽  
V.A. Voronov ◽  
St.S. Solntcev ◽  
...  
Keyword(s):  
Heat Treatment ◽  
Zirconium Dioxide ◽  
Monoclinic Phase ◽  
Eutectic Composition ◽  
Sol Gel ◽  
Ceramic Materials ◽  
Gel Method ◽  
Sol Gel Method ◽  
Zro2 System ◽  
Sintered Materials

The rheological properties, processes of structure and phase formation of the Al2O3–ZrO2 system compositions obtained by the sol-gel method have been investigated. The temperature range of crystallization of the compositions is 900–1100 °C. With an increase in the concentration of zirconium dioxide in the system, the temperature of the transition from the tetragonal to the monoclinic phase decreases. The effect of the ratio of the components in the initial solutions and the temperature regime of heat treatment of gels on the physicochemical properties of nanopowders and sintered materials has been studied. Ceramic materials of eutectic composition give the highest density and lower values of porosity and water absorption.

Turning ZrO2 ceramics

2010 ◽  
Vol 1 (1-2) ◽  
pp. 3-6 ◽  
Author(s):  
G. Fledrich ◽  
I. Pálinkás ◽  
R. Keresztes
Keyword(s):  
Machine Tools ◽  
Zirconium Dioxide ◽  
Hard Turning ◽  
Research Work ◽  
Ceramic Materials ◽  
Technological Parameters ◽  
Mechanical Effects

Abstract In place of brittle ceramics used so far have appeared up-to-date so-called tough ceramic materials resisting better against mechanical effects [1]. Such material is the zirconium-dioxide, too. The important advantage of hard-turning is the applicability of universal tool. Various outlines can be formed by a tool given. Machining ceramics in case of using traditional machining (turning, milling, drilling) requires special technological conditions (tools, machine-tools, technological parameters, etc.) [2] which are developing presently. We would like extending our research work in this course, too.

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