Zobrazeno 1 - 10
of 47
pro vyhledávání: '"E. S. Yamaguchi"'
Publikováno v:
Tribology International. 44:692-701
The chemistry and wear performance of a silane-containing additive in combination with conventional commercial engine oil additives such as zinc dialkyldithiophosphate (ZDDP), calcium-type detergent (Ca detergent), and B- and N-containing dispersant
Autor:
Jigang Zhou, Masoud Kasrai, G. M. Bancroft, J. Thompson, J. N. Cutler, E. S. Yamaguchi, R. I. R. Blyth
Publikováno v:
Tribology Letters. 39:101-107
X-ray photoelectron spectroscopy using a synchrotron source (SR-XPS) with variable photon energy has been used to non-destructively elucidate the variations in surface chemistry from ~5 nm to ~10 nm into the tribofilm derived from zinc dialkyldithiop
Autor:
E. S. Yamaguchi, Stephen H. Roby
Publikováno v:
Tribology Transactions. 52:706-716
The time-dependent film formation of two potential non-phosphorus supplemental wear inhibitors in the presence of secondary zinc dialkyldithiophosphate (ZnDTP) was studied by electrical contact resistance (ECR), auger, and X-ray photoelectron (XPS) s
Publikováno v:
Tribology Transactions. 52:73-85
The tribological properties of steel surfaces lubricated with blends consisting of base oil, some secondary zinc dialkyl dithiophosphate (ZDDP), and salicylate, sulphonate, or overbased phenate detergent were examined experimentally. Sliding experime
Publikováno v:
Tribology Letters. 32:81-90
A surface force apparatus has been used to investigate the drainage of a viscosity improver lubricant. The characterization of the VI confined interface has been performed. Surprisingly, dynamical measurements enlighten a significant negative value o
Publikováno v:
Canadian Journal of Chemistry. 85:675-684
A Plint friction and wear tester was used to investigate the effect of several calcium-containing detergents on the tribological and tribochemical performance of a zinc dialkyldithiophosphate (ZDDP) lubricating oil additive in a low-sulfur base stock
Publikováno v:
Tribology Transactions. 50:58-67
The interactions of zinc dialkyldithiophosphate (ZDDP) with three different Mo-containing dispersants has been investigated both on thermally and tribologically generated films. X-ray absorption near-edge structure (XANES) spectroscopy, at the P and
Publikováno v:
Proceedings of the Institution of Mechanical Engineers, Part J: Journal of Engineering Tribology. 220:463-469
In response to regulatory requirements, lubricant manufacturers are seeking oils that minimize soot thickening and the accompanying soot wear. Formulation technology is being developed by additive manufacturers to satisfy these requirements. For exam
Publikováno v:
Tribology Letters. 19:221-229
The chemical constitution of tribofilms, generated from zinc dialkyldithiophosphate (ZDDP) and ashless dialkyldithiophosphate (DDP), has been examined by X-ray Absorption Near Edge Structure (XANES) spectroscopy. The identification of spectral featur
Publikováno v:
Tribology Letters. 19:211-220
The growth and morphology of tribofilms, generated from zinc dialkyldithiophosphate (ZDDP) and an ashless dialkyldithiophosphate (DDP) over a wide range of rubbing times (10 s to 10 h) and concentrations (0.1–5 wt% ZDDP), have been examined using a