Zobrazeno 1 - 10
of 14
pro vyhledávání: '"Jānis Lungevičs"'
Autor:
Uldis Kanders, Karlis Kanders, Ernests Jansons, Janis Lungevics, Raimonds Sirants, Armands Leitans, Irina Boiko
Publikováno v:
Lubricants, Vol 11, Iss 12, p 501 (2023)
This article discusses the micromechanical properties and true microhardness determination of nanostructured tribological coatings (NTCs) based on a multilayered alternating nitride/carbonitride bilayer substructure for transition metals. The constit
Externí odkaz:
https://doaj.org/article/ca36c01f1156483f9e32baec071725ec
Autor:
Ernests Jansons, Janis Lungevics, Uldis Kanders, Armands Leitans, Guna Civcisa, Oskars Linins, Karlis Kundzins, Irina Boiko
Publikováno v:
Lubricants, Vol 10, Iss 11, p 285 (2022)
Ceramic Nanostructured Superlattice Coatings (NSC) have broad applicability to improve the parts’ and assemblies’ tribological and mechanical properties for the needs of the automotive and aerospace industries. Improving the material properties u
Externí odkaz:
https://doaj.org/article/36dc47fc84d34e0f8e17c142dd43b397
Publikováno v:
Frontiers in Mechanical Engineering, Vol 7 (2021)
A surface texture can be subdivided into three categories based on the magnitude of its wavelengths, i.e., macro-geometrical form, waviness, and roughness (from largest to smallest). Together, these components define how a surface will interact with
Externí odkaz:
https://doaj.org/article/241f12482ddf433397f9bfa95542372c
Autor:
Karlis Agris Gross, Janis Lungevics, Ernests Jansons, Ilze Jerane, Michael J. Wood, Anne-Marie Kietzig
Publikováno v:
Lubricants, Vol 9, Iss 10, p 103 (2021)
Frictional interaction with a surface will depend on the features and topography within the contact zone. Describing this interaction is particularly complex when considering ice friction, which needs to look at both the macroscopic and microscopic l
Externí odkaz:
https://doaj.org/article/6e0d11731dbc4492a9192860e5a5d85e
Publikováno v:
Journal of Tribology. 143
Surfaces only characterized by a roughness Ra or Sa may have a totally different surface texture and include complex patterns such as grooves, dimples, or a mirror-polish. Here, the bearing ratio is proposed as an additional characterization measure
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::27126751d6ba7c91669bc981a87f68af
https://doi.org/10.1115/1.4049704
https://doi.org/10.1115/1.4049704
Publikováno v:
Latvian Journal of Physics and Technical Sciences, Vol 55, Iss 5, Pp 54-64 (2018)
Winter brings snow and ice to Northern Europe and with it the need to move safely over ice. It has been customary to select an appropriate material surface for movement over ice, but another way to influence the interaction with ice is to appropriate
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::22dd4be9590339517436b450d4e6535f
https://doi.org/10.2478/lpts-2018-0036
https://doi.org/10.2478/lpts-2018-0036
Publikováno v:
Latvian Journal of Physics and Technical Sciences, Vol 55, Iss 1, Pp 64-75 (2018)
The ability to slide on ice has previously focused on the measurement of friction coefficient rather than the actual sliding velocity that is affected by it. The performance can only be directly measured by the sliding velocity, and therefore the obj
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c6cde2a8be280d6cee29c02673f90088
https://doi.org/10.2478/lpts-2018-0007
https://doi.org/10.2478/lpts-2018-0007
Publikováno v:
Latvian Journal of Physics and Technical Sciences, Vol 54, Iss 2, Pp 55-63 (2017)
The authors of the research have analysed spacing parameters of anisotropic 3D surface roughness crosswise to machining (friction) traces RSm1 and lengthwise to machining (friction) traces RSm2 . The main issue arises from the RSm2 values being limit
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::87f198d5cfd1346d1383c25e0f16df77
https://doaj.org/article/be54861d622a49c2af37616a696a6a6f
https://doaj.org/article/be54861d622a49c2af37616a696a6a6f
Publikováno v:
Latvian Journal of Physics and Technical Sciences, Vol 54, Iss 2, Pp 64-71 (2017)
The present paper discusses and analyses tribological properties of various coatings that increase surface wear resistance. Four Ti/C-N nanocoatings with different coating deposition settings are analysed. Tribological and metrological tests on the s
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::fc9504fa3f6fdc557f8b02ebeaa0b3fb
https://doi.org/10.1515/lpts-2017-0014
https://doi.org/10.1515/lpts-2017-0014
Publikováno v:
Latvian Journal of Physics and Technical Sciences, Vol 54, Iss 2, Pp 46-54 (2017)
The authors of the paper have investigated surfaces with irregular roughness for the purpose of determination of roughness spacing parameters perpendicularly to machining traces – RSm1 and parallel to them – RSm2 , as well as checking the relatio
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::15c45381cfb959ccf4d8ae28bf571110
https://doaj.org/article/c96434cc82f8402a9d073b2c7564563b
https://doaj.org/article/c96434cc82f8402a9d073b2c7564563b