Mario Marchetti
Glenn Research Center
12 Papers
111 Citations
Mario Marchetti is an academic researcher from Glenn Research Center. The author has contributed to research in topics: Krytox & Lubricant. The author has an hindex of 6, co-authored 12 publications.
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Papers
Evaluation of the tribological behavior of nano-onions in Krytox 143AB
TL;DR: In this paper, the use of carbon nano-onions, i.e., nanoparticles, as a potential additive in an oil for aerospace application has been presented, and the lifetimes were tested in ambient air and ultrahigh vacuum.
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A New Synthetic Hydrocarbon Liquid Lubricant for Space Applications
TL;DR: In this paper, synthetic hydrocarbon liquid lubricants based on polyalphaolefins have been developed for use in space applications and their physical properties have been fully characterized and their properties reported which include: kinematic and absolute viscosity, visco-ity index, vapor pressure, evaporation, specific gravity, pour point, coefficient of thermal expansion, refractive index, and flow activation energy.
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Tribological Performance of Some Pennzane®-Based Greases for Vacuum Applications
Mario Marchetti,William R. Jones,Kenneth W. Street,Donald R. Wheeler,Duane Dixon,Mark J. Jansen,Hiroshi Kimura +6 more
TL;DR: In this paper, three commercial greases based on multiply alkylated cyclopentane (Pennzane®) base oil were studied for space applications and the results indicated that all three greases yielded very low wear rates and extended lifetime.
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In-situ, On-demand Lubrication System for Space Mechanisms
TL;DR: In this paper, the authors present a system that provides to the ball-race contact fresh lubricant in-situ and on demand, using a porous cartridge attached to the inner or outer ring of a ball bearing.
Preliminary Evaluation of Greases for Space Mechanisms Using a Vacuum Spiral Orbit Tribometer
Mario Marchetti,William R. Jones,Kenneth W. Street,Stephen V. Pepper,Mark J. Jansen +4 more
- 01 Sep 2001
TL;DR: In this article, a spiral orbit tribometer (SOT) was used to evaluate two greases used in space mechanisms: a PFPE oil with polytetrafluoroethylene (PTFE) thickener, and a multiply alkylated cyclopentane oil with n-octadecylterephthalamate soap.