Zobrazeno 1 - 10
of 56
pro vyhledávání: '"R. J. Waltman"'
Autor:
R. J. Waltman, H. Deng
Publikováno v:
Advances in Tribology, Vol 2012 (2012)
Lower molecular weight Z-Tetraol films exhibit increased mechanical spacing in the slider-disk interface due to a lower z-profile. An increased resistance to lubricant disturbance on the disk surface (e.g., lube moguls) with decreasing film thickness
Externí odkaz:
https://doaj.org/article/037bc6fc55cb4a02902b65ac1727eaf9
Autor:
R. J. Waltman, Xing-Cai Guo
Publikováno v:
Tribology Letters. 45:275-289
AFM force–distance curves on 10-A films of Zdol, Z-Tetraol, and ZTMD were investigated using a carbon-modified AFM tip. The forces were non-specific dominated by adhesive and/or capillary forces. The snap-to distances for unbaked Zdol, Z-Tetraol, a
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::14611f750e11eb1094f02b9a9bd53d24
https://doi.org/10.1007/s11249-011-9887-2
https://doi.org/10.1007/s11249-011-9887-2
Autor:
R. J. Waltman
Publikováno v:
Tribology Letters. 43:175-184
Ab initio quantum chemical computations on model perfluoropolyether (PFPE) boundary lubricant film structures are used to study the effect of main chain confinement on dynamic main chain expansion in the direction perpendicular to the underlying surf
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e686ed52e757457463321ae9cc4cbeae
https://doi.org/10.1007/s11249-011-9796-4
https://doi.org/10.1007/s11249-011-9796-4
Autor:
R. J. Waltman, N. Kobayashi
Publikováno v:
Tribology Transactions. 54:168-177
The thin-film properties of some perfluoropolyether boundary lubricants based on hydroxyl-termination of the n-perfluoropropylene oxide monomer units are investigated as a function of molecular polarity. The n-perfluoropropylene oxide monomer units p
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f479bdd258c0fc10079b0745a2227565
https://doi.org/10.1080/10402004.2010.531890
https://doi.org/10.1080/10402004.2010.531890
Publikováno v:
Tribology Letters. 39:211-219
Lubricant pick-up by a low-flying slider is investigated for hydroxyl-terminated perfluoropolyethers as a function of the number of hydroxyl (OH) groups and of film thickness on the surface of finished rigid disks. The total number of hydroxyl (OH) g
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e210953510f68fa5e9a238db211b42b9
https://doi.org/10.1007/s11249-010-9638-9
https://doi.org/10.1007/s11249-010-9638-9
Publikováno v:
Brunner, R.; Tyndall, G. W.; Waltman, R. J.; & Talke, F. E.(2010). Adhesion Between Surfaces Separated by Molecularly Thin Perfluoropolyether Films. Tribology Letters, 40(1), pp 41-48. doi: 10.1007/s11249-009-9571-y. Retrieved from: http://www.escholarship.org/uc/item/45t1c4tm
The relationship between the adhesion of surfaces separated by a molecularly thin liquid film and the surface energy of the film was investigated. AFM-based force–distance curves were measured on a series of carbon surfaces coated with hydroxyl-ter
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::4d1f7eeed60324eee4316f6f1ae3f094
https://doi.org/10.1007/s11249-009-9571-y
https://doi.org/10.1007/s11249-009-9571-y
Publikováno v:
Tribology Letters. 33:137-142
We have investigated the resistance of a novel end-functionalized perfluoropolyether (PFPE) lubricant film to slider–disk interactions caused by low-flying sliders. The PFPE lubricant is based on the CF2CF2CF2O main chain monomer unit. Both slider
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::91fab38885c91a721f78a78a59a9b5a2
https://doi.org/10.1007/s11249-008-9398-y
https://doi.org/10.1007/s11249-008-9398-y
Autor:
R. J. Waltman, Xing-Cai Guo
Publikováno v:
Tribology Letters. 27:227-231
The 172 nm ultraviolet (UV) photodissociation of perfluoropolyether (PFPE) boundary lubricants is examined experimentally and theoretically. Carbonyl fluoride, COF2, is the major gas phase product that results from the UV irradiation of non-functiona
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::bc8b3a53753491cb650b8d74fe5e9e23
https://doi.org/10.1007/s11249-007-9229-6
https://doi.org/10.1007/s11249-007-9229-6
Publikováno v:
Tribology Letters. 26:1-9
As the hard disk drive industry is transitioning from longitudinal (LMR) to perpendicular (PMR) recording, a new set of reliability challenges had to be overcome. In particular, the magnetic media structure, which relies on well-segregated grains of
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b4db3544fbe6c02e4a144ff47dbf505a
https://doi.org/10.1007/s11249-006-9174-9
https://doi.org/10.1007/s11249-006-9174-9
Publikováno v:
Tribology Letters. 20:69-81
The intermolecular interactions at the interface between monomolecular hydroxyl-terminated perfluoropolyether (PFPE) liquids (Zdol, Zdol-TX, Z-Tetraol, Zdiac) and a sputtered amorphous silicon nitride film (SiN x ) are investigated using contact angl
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::11e2437532cb2eaf0bf4c0bb006587ad
https://doi.org/10.1007/s11249-005-7794-0
https://doi.org/10.1007/s11249-005-7794-0