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25 610 (0,148s)

Výsledek výzkumu

Nickel based composite coatings as alternative to hard chromium coatings

This paper deals creating electrodeposited nickel-based composite coatings with use of several dispersion materials with micro and nano meters dimensions as alternative to hard chromium coatings. Presence of dispersion in composite ...

JK - Koroze a povrchové úpravy materiálu

  • 2015
  • D
Výsledek výzkumu

Effect of filler on the surface roughness of hard chromium composite coating

Hard chromium surface treatments are widely used as functional coatings for piston rings. Since the properties of hard chromium coating are not longer sufficient for new applications composite hard chr...

Coating and films

  • 2013
  • D
  • Odkaz
Výsledek výzkumu

Composite chromium coatings for piston rings

This paper deals with an overview of the technology of production of composite hard chromium coatings for piston rings. The paper describes the functional conditions of piston rings and the method of manufacturing of composite surfa...

JR - Ostatní strojírenství

  • 2014
  • Jx
  • Odkaz
Výsledek výzkumu

Chromium Aminocarbene Complexes as Nucleophiles in Enantioselective Palladium-Catalyzed Allylic Substitution Reaction.

Chromium Aminocarbene Complexes as Nucleophiles in Enantioselective Palladium-Catalyzed Allylic Substitution Reaction.

CA - Anorganická chemie

  • 2005
  • O
Výsledek výzkumu

Replacement of hard chromium-plating by thermally sprayed coatings

Hard chromium-plating is an electrochemical process of creating functional coatings, used in many branch of industry for more than several decades. Its biggest disadvantage is its ecological impact. The work is dealing about the pos...

JJ - Ostatní materiály

  • 2002
  • D
Výsledek výzkumu

Fischer chromium carbene complexes as nucleophiles in palladium-catalyzed allylic substitution reactions.

The Pd-catalyzed reaction of anions of chromium aminocarbenes with allylic acetates affords allyl-substituted aminocarbenes. Reaction of the anion of pentacarbonyl[(methoxy)methylcarbene]chromium(0) gives the product of 1-m...

CC - Organická chemie

  • 2002
  • Jx
Výsledek výzkumu

Thin Films on the Basis of Chromium and Their Selected Properties

. The hardness of the deposited chromium oxide layers on silicon substrates was 18-25 GPa. The hardness of the deposited chromium nitride layers on silicon substrates was 15-20GPa.From chromium based layer...

JG - Hutnictví, kovové materiály

  • 2004
  • D
Výsledek výzkumu

Comparison of Wear Resistance of Chromium Coatings for Piston Rings using Pin-on-Disc Test and Engine Test

This paper deals with testing of hard chromium coatings, which are used for piston rings. There were tested the standard hard chromium, porous chromium and composite chromium coatings. Wear resist...

JR - Ostatní strojírenství

  • 2012
  • D
Výsledek výzkumu

Piston rod of the hydraulic cylinder

The technical solution relates to a piston rod of a hydraulic cylinder provided on the surface with a coating. This new coating is one of the possible replacements for hard chromium....

Coating and films

  • 2019
  • Fuzit
Výsledek výzkumu

The influence of corundum particles as filler on properties of hard chromium coatings

The paper describes the use of corundum powder as filler in hard chromium with globular graphite. Coatings were prepared in hard chromium plating bath with/without such as high hardness wear resistance che...

JR - Ostatní strojírenství

  • 2010
  • D
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