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The influence of sublayer material on surface properties of electrodeposited nickel with periodical structures

Fataraite E., Griskonis E., Guobiene A., Narmontas P., Prosycevas I., Tamulevic Ius S.

Materials Science Poland

2011

Vol. 29, No. 3

195--202

Surface topography, hardness and microstructure of nickel coatings electrodeposited on Si master with a periodical structure have been studied depending on vacuum deposited sublayer material (Ni, Cu or Ag). It is shown that the quality of replication of silicon master in a nickel shim electrodeposited simultaneously on different sublayers is dependent on the material used. All types of the analyzed coatings enabled transfer of lateral dimensions and showed good replication quality of the tested periodical structures (2 ?m period), while the structure replicated using the coatings deposited on the Ni sublayer exhibited the worst roughness. The hardness of the electrodeposited layers was found to be dependent on the sublayer material used as well as on the side of deposit. Despite the fact that the backside of nickel shim had the same hardness for all the sublayers used, it was found that the hardness of the working surface with periodical structure (the side that has been in contact with the vacuum deposited layer) is dependent on the sublayer material: the Ni and Cu sublayers increased the hardness of Ni coating, while for the nickel shim deposited on Ag sublayer the hardness was reduced.

Investigation of fluoroligomeric coats

Padgurskas J., Milvydas A., Rukuiza R., Prosycevas I., Guobiene A.

Prace Naukowe Instytutu Konstrukcji i Eksploatacji Maszyn Politechniki Wrocławskiej. Konferencje

2002

Vol. 87, nr 27

263-269

Fluoroligomers are liquid steamy oligomeric compounds of fluorine with oxygen and carbon. The chemosorbic compounds with metal are composing after coating the surface of detail with fluoroligomer. The aim of this research is to investigate the formation regularity of fluoroligomeric coats and influence of those materials to on the mechanical properties of surface. It was estimated that the thickness of fluoroligomeric coats depends on its concentration and coating method, but practically not depends on number of treatments. The coat evenness depends on number of coatings, oligomer concentration and coating method. Increment the concentration and treatment number increases the coat evenness. The molecules in fluoroligomeric coat layer at the pad of material are oriented parallel to the pad. This orientation changes receding from the pad. The fluoroligomer treatment decreases the micro-hardness of solid body till 15 % at 0,03 ... 0,04 mm deep because of chemosorbic interaction with steel. The change of micro-hardness decreases receding from the solid surface.