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OverviewResearch AreaTechnology and ObjectsSelected Publications |
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Contact information:Head of the Laboratory Dr. habil. chem., Professor I. Vītiņa Laboratory
of Elecrodeposition of Metals Institute of Inorganic Chemistry Miera 34 Salaspils, LV-2169 Latvia Phone: +371-7800772, Fax: +371-7800779, E-mail: nki@nki.lv |
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01.0680 "Electrochemical mechanism of formation
of thin layers of XRD-amorphous metal alloys and metal-inorganic
compound on different metal substrata". |
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01.0005.3.1 Subproject "Electrodeposition of
thin layers of metals and metal-inorganic compound to modify surfaces
of materials for microelectronics" (of Program "Intelligent
materials and those structures for microelectronics and
photonics". |
The laboratory participates in training of
undergraduates of the Chemical Department of the Latvian University in the
physical chemistry specialty according to a program: "The mechanism
of electrodeposition and structure formation of metals and metal-inorganic
compound thin layers on several materials (on surfaces of light and hard
alloys as well as on vacuum-sputtered metal surfaces for modification of
material surfaces)".
The
Laboratory is:
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accredited
as a testing laboratory (LATAK-T-088) of quality parameters of metal
structure and chemical composition of metal coatings, metal substrata and
of electrolytes;
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included
(№
90) in the TICQA project: "The European Information Service on
Providers of Conformity Assessment Activities" (testing of basic
metals, metal products and welding, optical and medical instruments,
construction).
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included
in the Canadian catalogue "Survey of Corrosion Research
Laboratories" (International Corrosion Council) 1998;
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a
member of "The Latvian Electronic and Electrical Manufacture";
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a
member of the Latvian Association of Quality.
Staff - 13 leading engineers.
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Research Area
The fields of research and technological development:
1. Mechanisms of electrodeposition and formation of
structure of metals and composite coatings metal-inorganic compound onto
light, hard alloys and vacuum evaporated metal substrates.
2. Interdiffusion of substrate metals and coatings,
formation of intermetallic layers, electrodeposition of barrier layers,
preventing interdiffusion.
3. Chemical, physicochemical and physical testing for
metal coatings, metals, metal articles and electrolytes:
- determination of qualitative indices of coatings and rolled, cast etc. metal articles;
- determination of chemical composition, structure, sort (chemical and X-ray phase analysis, optical, scanning and transmission electron microscopy).
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Technology and Objects
1. Electrodeposition and formation of structure of metals: tin, gold, nickel-boron, permalloy functional coating on to:
- copper and copper alloys;
- vacuum evaporated metal substrates - copper, permalloy and titanium;
- hard metals as niobium to produce superconductive coatings Nb3Sn, and titanium;
- aluminium and Al-alloys;
- barrier layers Co-W (48-53 wt% W) preventing interdiffusion Au-Ni-Cu, Au-Cu and formation of intermetallic layers;
- barrier layers Ni-B (6-8 wt%) preventing interdiffusion and formation of intermetallic layers Cu-Sn, Au-Cu.
2. Electrodeposition of black, solderable conductive
coatings of:
- tin/Chevrel phase PbMo6S8 to produce superconductive coatings (20-80 wt% PbMo6S8);
- tin/niobium carbonitride (9-80 wt% niobium carbonitride);
- tin/titanium-niobium carbonitride (55-70 wt% titanium-niobium carbonitride);
- tin/titanium nitride (5-70 wt% titanium nitride);
and composite coatings of:
- tin/penta-calciumphosphat Ca5(PO4)3(OH) [45 wt% Ca5(PO4)3(OH)];
- cobalt-tungsten alloys/penta-calciumphosphat Ca5(PO4)3(OH);
- nickel/zirconium oxide (50 wt% ZrO2+Y2O3).
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Selected Publications
(Publications from last 6 years)
1. The changes of structure upon thermal treatment of
gold coatings electrodeposited on vacuum sputtered Ti and electrodeposited
Ni-B or Ni-Fe layers. Thin Solid Films, 1995, 270, p. 380-386.
2.
Characterization of aluminium alloys and titanium surface structure.
Materials of XI European Congress on Electron Microscopy EUREM'96, August
26-30, 1996, Dublin, Ireland.
3.
Formation of intermediate intermetallic layers at interaction of
electrodeposited tin, Ni-Fe, Ni-B coatings with different metallic
substrata. "J. of Adhesion Science and Technology", 1997, vol.
11, Nr. 6, p. 835-860.
4.
Preparation and characterization of composite tin/Chevrel phase PbMo6S8
and tin/titanium-niobium carbonitride Ti0.63Nb0.34C0.38N0.58.
Thin Solid Films, 1998, 323, p. 23-30.
5. The
research and study interdiffusion of electrodeposited and sputtered
layers. "High-Temperature Corrosion Research in Progress":
1997AP-110333-CD, 1998, vol. 2, L-2, L-3. Editor "Electric Power
Research Institute Review" (USA), customer "Corrosion and
Protection Centre" (United Kingdom).
6.
Electrochemical modification of ZrO2+Y2O3
disperse phase with nickel. Materials of the VII-th International Baltic
Conference "Materials Engineering-98", Jūrmala, September
24-25, 1998, p. 90-95.
7.
Structure and phase stability of the chemically deposited Au layers on the
electrodeposited Ni and Ni-B layers. ²Surface
and Coatings Technology²,
1999, 120-121, 430-437.
8.
Nanodisperse refractory compounds in the electrodeposited metal coatings.
"Nanostructured Films and Coatings", Kluwer Academic Publisher.
2000. g., 78, p. 103-111.
9.
Characterization of structure and phase composition for gold and
cobalt-tungsten layers in the systems Au(electrodeposited, chemically
deposited)/Co-W/Cu. Abstract International Conference on Metallurgical
Coatings and Thin Films, April 30-May 4, 2001, USA, p.51.
10.
Electrodeposition of composite coatings of tin-disperse phase
hydroxylapatite Ca5(PO4)3(OH)+Ca3PO4
to modify surfaces of metal implants. Abstract of the "Seventh
International Conference on Interfacial Phenomena in Composite
Materials", September 11-14, 2001, Arachon, France, p. 204-205.
11.
Nanodispersed refractory compounds in the electrodeposited metal coatings
used for the surface modifying. Abstract of the "Seventh
International Conference on Interfacial Phenomena in Composite
Materials", September 11-14, 2001, Arachon, France.
12. Electrodeposition and properties of thin layers of Co-W alloy amorphous to X-ray diffraction, and composite (Co-W)-hydroxylapatite to modify surfaces of materials. Materials of the X-th International Baltic Conference "Materials Engineering & Balttrib 2001", September 27-28, 2001, Jurmala, Latvia, p. 130-137.
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