Robert Thom
Marshall Space Flight Center
9 Papers
65 Citations
Robert Thom is an academic researcher from Marshall Space Flight Center. The author has contributed to research in topics: Bearing (mechanical) & Lubrication. The author has an hindex of 4, co-authored 9 publications.
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Papers
Rolling contact fatigue tests of reactively sputtered nitride coatings of Ti, Zr, Hf, Cr, Mo, Ti-Al, Ti-Zr and Ti-Al-V on 440C stainless steel substrates
TL;DR: In this article, eight different nitride coatings (TiN, ZrN, HfN, CrN, Mo 2 N, Ti 0.5 N and (Ti-Al-V)N) were used for rolling contact fatigue (RCF) tests on hardened (RC 60) 440C stainless steel specimens.
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On Heat Generation in Rolling Contacts Under Boundary and Mixed Lubrication
TL;DR: In this paper, the authors report on experiments and theoretical analyses of heat generation and scuffing failure in rolling contacts and show that heat generated by asperity plastic deformation in the direction normal to the contact can be significant in high load, high speed contacts under boundary and mixed lubrication conditions.
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High current density ion implantation processing of 440C steel Part 1: Implantation parameters and rolling contact fatigue improvement
TL;DR: In this paper, surface modification by high current density (107 μA cm -2 ) ion implantation processing with nitrogen (N 2 + ) was performed to assess the effects of ion implantations on rolling contact fatigue performance.
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History of Space Shuttle Main Engine Turbopump Bearing Testing at the Marshall Space Flight Center
Howard G. Gibson,Robert Thom,Chip Moore,Dave Haluck +3 more
- 03 May 2010
TL;DR: A detailed report of all the bearing testing done at the Marshall Space Flight Center (MSFC) can be found in this paper, where a test rig was designed and delivered to MSFC for testing hydrostatic bearing but with the need by Pratt to validate their bearings, the rig was reconfigured for testing of two ball bearings or a ball bearing and a roller bearing.
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Liquid Hydrogen Testing of Silicon Nitride Bearings for Use In High Speed Turbomachinery
Lewis E. Moore,Howard G. Gibson,Robert Thom +2 more
- 01 Jan 1998
TL;DR: Hybrid ceramic rolling element bearings are being tested in liquid hydrogen at Marshall Space Flight Center as mentioned in this paper, where the testing will evaluate their long term durability for use at high speeds in cryogenic rocket engine turbomachinery.
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