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Lungevics J.,Riga Technical University | Leitans A.,Riga Technical University | Rudzitis J.,Riga Technical University | Bulahs N.,Riga Technical University | And 2 more authors.
Latvian Journal of Physics and Technical Sciences | Year: 2016

Carbon-copper composite coatings reinforced with titanium were deposited using high power magnetron sputtering technique. Tribological and metrological tests were performed using Taylor Hobson Talysurf Intra 50 measuring equipment and CSM Instruments ball-on-disk type tribometer. Friction coefficient and wear rate were determined at 2N, 4N, 6N loads. It was revealed that friction coefficient decreased at a higher Ti concentration, which was particularly expressed at bigger applied loads. However, wear volume values tended to increase in the beginning, till Ti concentration reached about 11 %, but then decreased, thus providing better nanocoating wear resistance. © 2016 J. Lungevics et al., published by De Gruyter Open 2016.


Kanders U.,Naco Technologies Ltd | Kanders K.,ETH Zurich | Maniks J.,University of Latvia | Mitin V.,Naco Technologies Ltd | And 3 more authors.
Surface and Coatings Technology | Year: 2015

The micromechanical properties of sputter deposited amorphous carbon-copper (a-C/Cu) composite films with different carbon content (6.8-19.8at.%) were investigated. Atomic force and electron microscopy studies confirmed that the a-C/Cu films have a two-phase microstructure of amorphous sp2/sp3-bonded carbon as a composite matrix with embedded copper nanocrystallites encapsulated in a graphene shell. Load-displacement curves obtained in nanoindentation experiments followed Meyer's law with the exponent varying slightly within the interval 2.0-2.2 depending on the penetration depth and carbon content. The reverse indentation size effect was observed which was most likely the result of compacting and densification of the films due to grain boundary sliding. The apparent hardness and elastic modulus versus displacement exhibited a monotonic increase within the whole indentation range. To determine the true hardness and the true elastic modulus a simple empirical technique based on the strain gradient plasticity approach was proposed. The elastic-plastic strain gradients were calculated from the nanoindentation loading-unloading curves and a micromechanical model of the a-C/Cu film samples was developed based on the strain gradients' fine structure (coating's fingerprint). The a-C/Cu films exhibited reasonable true hardness (1.4-2.8GPa) combined with good plasticity which are significant prerequisites for solid lubricant applications. © 2015 Elsevier B.V.


Patent
Naco Technologies Ltd | Date: 2015-08-11

A solid lubricant magnetron sputtering physical vapor deposition (MS PVD) coating can be used e.g. in automotive, aircraft and space industries for increasing lifetime of moving parts such as bearings, chains, pistons and joints that experience sliding or rolling friction. A nanocomposite solid lubricant coating contains a carbon matrix with copper grains and at least one of Ti, Zr, Hf, and V, in bulk proportions, at. %: The carbon matrix with copper grains is reinforced with interlayers of the additional metal. The thickness of each layer of the carbon matrix with copper grains is in the range between 30 and 150 nanometers and the thickness of each interlayer of the additional metal is in the range between 5 and 20 nanometers. The hardness of said coating is in the range between 200 and 1000 HV.


Patent
Naco Technologies Ltd | Date: 2016-08-10

The invention relates to a solid lubricant magnetron sputtering physical vapor deposition (MS PVD) coating, which can be used in mechanical engineering, specifically in automotive, aircraft and space industries for increasing lifetime of moving parts such as bearings, chains, pistons and joints that experience sliding or rolling friction. A nanocomposite solid lubricant coating containing a carbon matrix with copper grains, according to the invention, contains an additional metal selected from the group consisting of Ti, Zr, Hf, Cr, V, Fe in bulk proportions, at.%:carbon5 - 35;copper50 - 90;additional metal5 - 15.


Naco Technologies Ltd | Entity website

Feb 2016 LATVIAN STARTUP ASSOCIATION IS FOUNDED 28 respected members of Latvian startup community have united and officially formed Latvian Startup Association, an organization established to promote Latvian startup scene, connect it to the rest of the world, represent its interests, foster mutual respect and promote understanding about startups in Latvia. It is important to note that this is the first time in Latvian history when representatives of IT startups, science-based startups, coworking spaces, accelerators and other community hubs, investors and experienced individual and corporate supporters have sat at one table and united in one organization with common goals ...


Naco Technologies Ltd | Entity website

Coating for non-organic products and elements is like skin for any live organism. It protects from environmental impact and expands the length of its useful life ...


Naco Technologies Ltd | Entity website

Naco Technologies know-how in protective and functional coatings is the result of more than 30 years of R&D. Our method of ion-plasma deposition of multi-component coatings has recently received international recognition in innovation and industrial applications from the European Patent Office (patent Nr 2050837) ...


News Article | March 8, 2015
Site: nacotechnologies.com

Project is successfully completed with the 6th phase and all requirements to industrial research of adaptive multifunctional coatings acquisition by ion-plasma methods (PVD technology) were delivered in time... In 5th stage PVD basic technology was enhanced step by step that allowed to get a-C/Cu coating with a manageable and controllable superstructure... The EuroNanoForum 2015 is an event for everyone interested in nanotechnologies and advanced materials science, innovations and business, across all industrial sectors... On 8 April NanoBusinessBrunch took place at Latvian University, where students could get acquainted with innovative companies working in the field of nanotechnologies and nanomaterials... The 4th stage was concentrated on a-C/Cu coating superstructure 'as-deposited' studies and coating post-treatement outside of the vacuum chamber... First three stages of the project continued our successful industrial research that included analytical measurements of nano-coatings... Commercialization Reactor Performance Day (Performance Day) event which takes place in Riga, Latvia on the 7th of October, 2014... Wide range of scientific and technical information on the existing solid lubricant PVD technological solutions and theoretical models are gathered and potential candidates in the field of anti-friction coatings are selected... SIA Baltijas Industriālais Serviss found a number of positive points by application of nano coating Naco D2 on disk blades... 1st stage of the project was conducted as part of the industrial research on anti-friction coatings of amorphous carbon-copper composite (aC/Cu) film base...


Naco Technologies Ltd | Entity website

Jun 2015 EURONANOFORUM 2015 IN RIGA The EuroNanoForum 2015 is an event for everyone interested in nanotechnologies and advanced materials science, innovations and business, across all industrial sectors. Taking place in Riga, Latvia, on June 10-12, it is the place to be for finding new project partners and customers ...

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