Author
E. A. Deulin
Bio: E. A. Deulin is an academic researcher from Bauman Moscow State Technical University. The author has contributed to research in topics: Outgassing & Ultra-high vacuum. The author has an hindex of 7, co-authored 19 publications receiving 126 citations.
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01 Mar 2012
TL;DR: In this article, the authors used a matrix-based approach to calculate the friction coefficient of a rotor-motion feedthrough in order to determine the surface coverage at "Dry" friction.
Abstract: Contents Preface About the Authors 1 Using Precise Mechanisms in Modern Vacuum Technological Equipment References 2 Typical Vacuum Mechanisms 2.1 Functions of Vacuum Mechanisms 2.2 Rotary-Motion Feedthroughs 2.3 Linear-Motion Feedthrough 2.4 Manipulators 2.5 Micro Mechanisms References 3 Friction in Vacuum 3.1 Friction Coefficients of Different Materials in Atmosphere and in Vacuum 3.2 Dry Friction Laws in Atmosphere and in Vacuum 3.3 The Main Factors, which Determine the Surface Coverage at "Dry" Friction 3.3.1 Influence of the Residual Pressure and Temperature 3.3.2 Influence of the Sliding Velocity and Roughness Geometry 3.4 The Theoretical Analysis of Friction in the Different Ranges of Coverage 3.4.1 Viscous Component of a Friction Force 3.4.2 Capillary Component of a Friction Force 3.4.3 Adhesive-Viscous Friction 3.4.4 Adhesive Friction 3.4.5 Cohesion Friction 3.5 The Possibility to Use the Described Method for the Calculation of the Friction Coefficient of Real Surfaces 3.6 Exchange of Gases at Friction in Vacuum References 4 Matrix Method of the Design of New Mechanisms Structure 4.1 The Stages of the Matrix Method of the Mechanisms Generation 4.2 The List of the Parameters of Vacuum Mechanisms Which Are Used in Matrix Analysis 4.2.1 The First (Highest) Level Parameters 4.2.2 The Second Level Parameters 4.2.3 The Third Level Parameters 4.2.4 The Fourth Level Parameters 4.3 Algorithm of the Matrix Method of the Generation of New Mechanisms References 5 Precision of Vacuum Mechanisms 5.1 The Constituents of Errors of Vacuum Mechanisms 5.2 The Basic Positions of the Precision Theory of Vacuum Mechanisms 5.2.1 Open-Loop-Controlled Drive 5.2.2 Completely Loop-Controlled Drive 5.3 Determination of the Error Components of Different Origins 5.3.1 Calculation of the Kinematic Component of the Error 5.3.2 Calculation of the Error from Elastic Deformations 5.3.3 Calculation of the Error Caused by the Deformation of theThin-Wall Sealing Elements 5.3.4 Calculation of the Positioning Error Caused by the Resistance Forces at Movement 5.4 Summarizing the Components of different Types and Forms 5.5 Correlation of Total Error of the Mechanisms with Economic Parameters References 6 Vacuum Mechanisms of Nanoscale Precision 6.1 The Principles of Nanometer Precision of Vacuum Mechanisms 6.2 Physical Effects Which Are Used for Vacuum Mechanisms of Nanometer Precision Creation 6.2.1 Piezo Effect 6.2.2 Magnetic and Electric Rheology Effects 6.3 Vacuum Drives and Manipulators of Nanoscale Precision 6.3.1 Vacuum Piezo Drives 6.3.2 Multi-Coordinate Magnetic and Rheology Drives and Manipulators References 7 Ultrahigh Vacuum Rotary-Motion Feedthroughs 7.1 Analysis of Design Variants of Thin-Wall Sealing Elements on Parameter "Manufacturability" 7.2 Precision of Harmonic Gear Rotary Feedthroughs 7.3 Longevity of Harmonic Gear Rotary Feedthrough 7.4 Outgassing Flow of Harmonic Rotary-Motion Feedthrough 7.5 Calculation of Hermetic Harmonic Gear Feedthrough 7.5.1 Determinationof the Number of Teeth 7.5.2 Calculation of Main Sizes of Flexible Gears 7.5.3 Calculation of Control Rollers Size of Rigid Gear 7.5.4 Calculation of Flexible Gear Geometry, Calculation of Geometry Sizes which Ensure Hermetic Properties of Flexible Gear 7.5.5 Calculation of Assurance Factor of Flexible Gear Teeth 7.5.6 Calculation of Flexible Gear Wave Generator References 8 Ultrahigh Vacuum Non-Coaxial Linear-Motion Feedthroughs 8.1 The Hermetic Drive Designs Principles Based on Non-Coaxial Nut-Screw Couples 8.2 Geometry of Nut-Screw Coupling of Linear-Motion Hermetic Feedthrough 8.3 Kinematic Calculation 8.4 Force Calculation of Hermetic Feedthroughs Based on Non-Coaxial Nut-Screw Mechanisms 8.5 System Losses and Efficiency Factor of Hermetic Feedthroughs Based on Non-Coaxial Nut-Screw Mechanisms 8.6 Analysis of Loading Ability of Planetary Nut-Screw Feedthroughs References 9 Vacuum
26 citations
TL;DR: In this paper, the authors investigated the outgassing of bare stainless steel and MoS 2 coated ball bearings, both of which are widely used in modern high vacuum technological equipment.
22 citations
TL;DR: In this paper, the outgassing curve of SS surfaces under sliding friction in ultra-high vacuum has been studied by addesorption mass-spectrometry and Auger electron spectroscopy.
20 citations
TL;DR: In this article, a ball bearing with carbon chromium steel balls of 3.97 mm diameter was used for testing and the SIMS depth profiling of the contact surface areas of the ball shows that deuterium concentration has the highest value of C 0 = 1.3×10 18 atoms cm −3 at a depth of 0.1 μm from the surface.
15 citations
TL;DR: In this article, an UHV dynamic expansion system to study gassing and outgassing of metals under friction in vacuum has been developed, which consists of two main parts separated by a wall with a central orifice of nominal conductance of 5.27 l s −1 for N 2 at 300 K. The results show that pressure increase caused by the deformation of the sealing bellow of the friction cell, i.e. without friction, is 1.7×10 −11 ǫ (0.6% of the base pressure).
15 citations
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TL;DR: In this paper, the structure and properties of bearing steels prior to the point of service are first assessed and described in the context of steelmaking, manufacturing and engineering requirements, followed by a thorough critique of the damage mechanisms that operate during service and in accelerated tests.
729 citations
TL;DR: The hydrogen transport behavior together with hydrogen embrittlement (HE) in hydrogen-charged type 304 and 316 stainless steels during deformation was investigated by combined tension and outgassing experiments as discussed by the authors.
96 citations
TL;DR: In this paper, the dependence of friction on water films with various thicknesses is examined using a scanning force microscopy (SFM) between a hydrophilic silicon tip and silicon flat that was rendered either hydrophobic or hydrophobic.
77 citations
TL;DR: In this paper, the authors focus on understanding what governs the tribological behavior of dry lubricated contact to find out the keys to develop new coatings for space applications, and also bring some recommendations to design coatings in terms of microstructure, addition of metal and gaseous dopant, etc.
50 citations
TL;DR: In this paper, an experimental procedure to decrypt the 3rd body flows and the identification of velocities accommodation sites and modes allowed to identify columnar structure as the main reason for low friction and long life.
45 citations