Relevant bibliographies by topics / Ball-on-disk

Contents

  1. Journal articles
  2. Dissertations / Theses
  3. Book chapters
  4. Conference papers

Academic literature on the topic 'Ball-on-disk'

Author: Grafiati
Published: 4 June 2021
Last updated: 8 February 2022

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Journal articles on the topic "Ball-on-disk"

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Fildes, J. M., S. J. Meyers, R. Kilaparti, and E. Schlepp. "Improved ball crater micro-abrasion test based on a ball on three disk configuration." Wear 274-275 (January 2012): 414–22. http://dx.doi.org/10.1016/j.wear.2011.11.003.

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Chan, Shan Tai, Ming Xiao, and Yuan Yuan. "Holomorphic isometries between products of complex unit balls." International Journal of Mathematics 28, no. 09 (August 2017): 1740010. http://dx.doi.org/10.1142/s0129167x17400109.

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We first give an exposition on holomorphic isometries from the Poincaré disk to polydisks and from the Poincaré disk to the product of the Poincaré disk with a complex unit ball. As an application, we provide an example of proper holomorphic map from the unit disk to the complex unit ball that is irrational, algebraic and holomorphic on a neighborhood of the closed unit disk. We also include some new results on holomorphic isometries.
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Premanond, Varunee, and Onnjira Diewwanit. "Influences of Cobalt Content on the Physical and Tribological Properties of Cemented Tungsten Carbide Used in Sheet Metal Forming Application." Advanced Materials Research 966-967 (June 2014): 80–86. http://dx.doi.org/10.4028/www.scientific.net/amr.966-967.80.

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The objective of this work is to investigate the tribological behavior between WC-Co cemented carbide and austenitic stainless steel under repeated rotation sliding. Influences of cobalt content of commercial grade cemented tungsten carbide on friction coefficient and material transfer phenomena have been explored. Three grades of commercial WC-Co cemented carbide with similar medium WC grain size were employed; WC-12Co, WC-14Co and WC-19Co. The average grain size were ranges between 0.85-1.1 μm and the hardness of about 86-88 HRA have been given by the material maker. The composition analysis and the average grain size of tungsten carbide have been rechecked. Furthermore, the carbide grain size distribution was recorded and the fracture toughness was calculated for each WC-Co grade. The experiments were carried out using ball on disk test. The ball was made from SUS304 grade and the disk was fabricated by 3 grades of WC-Co cemented carbide. The friction coefficient was measured under dry sliding. The characteristics of contact surfaces were explored on the ball as well as on the disk after tests to reveal the presence of a metallic transfer on the WC-Co cemented carbide disk and the wear scar on the ball. The measurement results of wear volume on the stainless steel ball disclosed that maximum wear rate was found from the stainless steel ball rub against WC-19Co tool material.
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Shin, Kyung Seob, Chung Woo Cho, and Young Ze Lee. "The Effect of Surface Roughness on Wear-Life of DLC Coated Silicon Disk in Dry Sliding." Solid State Phenomena 110 (March 2006): 213–20. http://dx.doi.org/10.4028/www.scientific.net/ssp.110.213.

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Dry sliding wear resistance of DLC coated silicon disk with different surface roughness has been evaluated using a ball-on-disk sliding tester. It was found that the transfer layer formed on steel ball produced a low friction regime and the formation of transfer layer was more active with increasing the substrate surface roughness. The wear life of DLC coating was increased as increasing the real area of contact.
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Feng, Tao, Tao Li, Yu Zhang, Zhuo He, and Lin Wang. "Comparison on the Tribological Properties of Roller and Guide Tribo-Pair Used in Antenna Deployable Structure." Materials Science Forum 1041 (August 4, 2021): 37–44. http://dx.doi.org/10.4028/www.scientific.net/msf.1041.37.

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The tribological properties of roller and guide tribo-pair are important for the design of deployable structure for space-borne perimeter truss antenna. In this study, carbon fiber epoxy resin composites are used as the guide material; while polyimide and GCr15 steel are used as the roller material. Then, friction coefficient of polyimide ball and GCr15 steel ball against carbon fiber epoxy resin composites disk were compared and investigated on the high-temperature, ball-on-disk tribometer under different operating conditions, respectively. The wear morphology of disk was measured by laser scanning confocal microscope. The results show that the friction coefficient of the polyimide ball against carbon fiber epoxy resin composites tribo-pair has better tribological properties. Meanwhile, the friction coefficients of this pair are mainly depend on abrasive wear under low pressure and velocity conditions while the adhesive wear has dominated influence on the friction coefficient for high pressure and velocity conditions. Besides, the tribological properties of carbon fiber epoxy resin composites are mainly affected by ploughing of surface roughness at low temperature, while by surface debonding at high temperature.
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Tanaka, Kentaro, Masahiro Kawaguchi, Takahisa Kato, and Katsumi Iwamoto. "Effects of Mobile and Bonded Molecules of Molecularly Thin Lubricant Film on the Vibrational Stability of a Sliding Ball." Journal of Tribology 128, no. 1 (August 18, 2005): 176–80. http://dx.doi.org/10.1115/1.2114967.

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Lubrication by an extremely thin film has become very important in micromachines, magnetic recording disks, and so on. Molecularly thin perfluoropolyether (PFPE) films are considered a good lubricant for these micro devices. When the thickness of the PFPE film is thinned to several nanometers, it is possible to assume that the film consists of mobile and bonded molecules. In this paper, we investigated the role of these molecules from the viewpoint of the vibrational stability of the sliding ball with the disk surface. From experiments by the ball on disk type tribotester, it is found that both mobile and bonded molecules exist on the disk surface, the bouncing vibration of the sliding ball can be reduced wide load range. In the case where only mobile or only bonded molecules exists, there is little effect on the bouncing vibration.
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Watanabe, Tetsuya, Kohei Suzuki, Fumiya Iiyama, and Hiroshi Sodeyama. "Experimental Study on Ball Screw Type Magnetic Friction Damper: Semiactive Control Using Electromagnet." Journal of Pressure Vessel Technology 126, no. 1 (February 1, 2004): 110–14. http://dx.doi.org/10.1115/1.1634585.

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This report deals with the fundamental behavior of friction dampers for piping systems installed in industrial facilities. Energy dissipating effect depends on sliding displacement and friction force. If the sliding motion increases, the effect of energy dissipation is expected to rise. In this report, a ball screw-type magnetic friction damper is proposed to adapt on piping systems. In order to increase the frictional sliding, this damper converts an axial motion to a rotating motion by a ball screw. Frictional behavior occurs between a rotation disk and a fixed disk on the frame of damper. Friction force depends on the permanent magnets located on the fixed disk. The fundamental characteristics such as load-displacement curves, damping force at the ball bearing and inertia force of the rotation disk are obtained by experiments and a calculation model is made from the experimental data. The calculated responses are, then, compared with the results from the experiment. The calculation model is applied to a one-degree-of-freedom-system in order to investigate the response reduction effect of the system. An electromagnet is applied on the damper instead of the permanent magnet to control friction force and the controlled behavior is evaluated.
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Gent, A. N., T. T. Thompson, and R. D. Ramsier. "A “Wobble-Plate” Dynamic Test Device." Rubber Chemistry and Technology 76, no. 4 (September 1, 2003): 779–84. http://dx.doi.org/10.5254/1.3547771.

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Abstract A simple dynamic tester is proposed, in which a disk of rubber is subjected to a rotating tilting deformation. In one arrangement, the rubber disk rests on a horizontal base and a light steel plate rests on its upper surface. A circular groove in the upper surface of the plate is centered on the axis of the rubber disk. An off-center vertical load is then applied to the rubber disk via a steel ball running in the circular groove. As the ball rolls round the groove, driven by friction with a rotating countersurface, the rubber disk undergoes a rotating off-center compression - a tilting deflection - that rotates at the same rate as the ball. If the rubber is perfectly elastic, no torque is required to maintain this motion and the deflection of the rubber will be exactly in phase with the compressive force. The maximum deflection then occurs at the location of the ball. However, if the rubber exhibits delayed elasticity, then the maximum deflection occurs after the ball has passed, at an angular separation δ, where δ is the angle of mechanical loss. Thus, the phase angle δ can be observed and measured directly. Also, if required, the separate components E′ and E″ of the complex dynamic modulus can be calculated from the applied force and deflection, and the torque required to maintain the motion.
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D’Ans, Pierre, and Marc Degrez. "Sliding Wear Behavior of Friction Couples Primarily Selected for Corrosion Resistance: Iron Boride/Iron Boride and Iron Boride/Yttria-Stabilized Zirconia." Metals 8, no. 12 (December 16, 2018): 1071. http://dx.doi.org/10.3390/met8121071.

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Wear mitigation in a sliding couple is challenging if wear has to be minimized on both surfaces. In this paper, ball-on-disk testing is performed on sliding couples where both surfaces (ball and disk) are treated for wear resistance. Studied materials are pack borided H13 tool steel (ASTM A681), pack borided AISI 420 stainless steel (ASTM A276) and plasma sprayed yttria-stabilized zirconia (YSZ). Borided H13 steel exhibits a single phase Fe2B layer, while AISI 420 has a double phase layer, with FeB on the outer surface. Both FeB/Fe2B and FeB/YSZ couples generate three-body abrasion. In the latter case, mass transfer occurs from the ball to the disk as well. Friction coefficient is ~0.6 for the AISI 420/Fe2B and FeB/Fe2B sliding pairs, with less vibration on the latter and wear rates close to 10−3 mm³·(N·m)−1 for both the ball and the disk. In comparison, the FeB/YSZ pair has a friction coefficient of ~0.65, a similar total mass loss, but a much higher wear rate for YSZ than for FeB.
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Markovits, Tamás, Lajos Borbás, László Molnár, András Lajos Nagy, and Fülöp Dávid Fülöp. "Lézersugárral felületkezelt acél minták ball-on-disk típusú koptató vizsgálata." Acta Periodica 20 (2020): 51–63. http://dx.doi.org/10.47273/ap.2020.20.51-63.

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A bemutatott kutatásban lézersugárral felületkezelt acél minták ball-on-disk típusú koptató vizsgálatának eredményeit mutatjuk be. A lézeres felületkezeléssel létrehozott edzett és nikkel bázisú wolfram karbid tartalmú bevonatolt tárcsák koptató vizsgálatait végeztük el, azzal a céllal, hogy meghatározzuk a kopással szembeni ellenállás változását a kezeletlen acél alapanyagokhoz képest. A kapott eredményekből jól látható, hogy a lézerrel felületkezelt alapanyagok kopásállósága jobb volt, mint felületkezelés nélkül. Az eredményekben bemutatásra kerülnek jellegzetes kopási nyomok, kopási szélességek, mélységek, keresztmetszetek, a lekoptatott tömeg és a súrlódási együttható változása a különböző esetekben.
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Dissertations / Theses on the topic "Ball-on-disk"

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Valenta, Jakub. "Vývoj metody pro hodnocení režimu mazání ve valivém ložisku." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2020. http://www.nusl.cz/ntk/nusl-417738.

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The aim of this master’s thesis is to develop measuring methods for evaluation of the lubrication regime in a rolling bearing. The first part of thesis maps several measuring methods according to which the lubrication mode can be evaluated. Based on the assessment of this part, electrical monitoring methods were selected. For application of these methods was constructed testing device with rolling bearing. Specific measuring chains based on selected methods were designed and verified by using initial tests on a ball-on-disk tribometer. According to the results of these initial measurements was selected and applied suitable measuring chain to the selected test device. In the end, there was a successful measuring the lubrication parameter on the rolling bearing. Additionally, other tests dealing with the influence of temperature and type of oil on the measurement itself were performed.
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Dočkal, Kryštof. "Analýza mazaného kontaktu poddajných těles." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2015. http://www.nusl.cz/ntk/nusl-231789.

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This diploma thesis deals with the proposal of methodology for film thickness eva- luation within compliant contacts. With respect to characteristics of such contact pairs, like variable film thickness, high surface roughness, or poor conductivity and reflectivity, the usage of conventional experimental methods is particularly complicated. In present study, an optical method based on the principle of fluo- rescent microscopy was employed in present thesis. An evaluation algorithm in- volving background normalization and calibration of fluorescent intensity to film thickness was created in a form of experimental software. The proposed algori- thm was validated by using elastohydrodynamic contact formed between ceramic ball and glass disc. The measured film thickness was compared with theoretical prediction, while very good agreement of obtained data was observed. Further, a series of experiments with compliant samples was conducted, while the central film thickness was evaluated as a function of mean speed, applied lubricant, ap- plied load and slide-to-roll ratio. The last part of the thesis is focused on results analysis and discussion considering the previously published literature.
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Venský, Jiří. "Výpočetní analýza čtyř-koulového testu pro určování pevnosti keramických laminátů se zbytkovou napjatostí." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2021. http://www.nusl.cz/ntk/nusl-443738.

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Tato diplomová práce se zabývá numerickou simulací B3B zkoušky. Byla provedena rešerše v souvisejících oblastech. Poté byly provedeny numerické simulace této zkoušky pro mnoho různých konfigurací (rovný, zakřivený a zakřivený vrstvený vzorek) pro disk a desku. Byla zjištěna hyperbolická závislost mezi tloušťkou a f faktorem. Závislost f faktoru na křivosti byla lineární. Byla provedena demonstrace možnosti prasknutí na rozhraní vrstev. Poslední část ukázala, jak by zanedbání vlivu zbytkového napětí mohlo vést ke špatnému vyhodnocování experimentů
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JIAN-ZHI, CHEN, and 陳建志. "Friction and Wear of Steel Ball Sliding on Aluminum Disk under Boundary Lubrication Condition." Thesis, 1999. http://ndltd.ncl.edu.tw/handle/30973731194787062006.

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碩士
國立臺灣大學
機械工程學研究所
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The thesis is studied the lubrication condition of a steel ball sliding on an aluminum disk. The lubricant condition is expected to be in the boundary or mixed lubrication region of a Stribeck curve. To construct the curve, it is only considered the rate of rotation, the lubrication viscosity, and the nominal bearing pressure. Since surface topography and additives are not considered in Stribeck curve, the predicted results should be different from the practical ones. From the experimental results, the higher relative sliding speeds and lubricant viscosity, the accommodating EP additives, the lower surface roughness, and pressure, the hydrodynamic film can be built up easily. Hence, friction coefficients decreased. Moreover, the wear loss reduced and the wear mechanism became pure abrasive. The results from surface profiler and EDAX also agreed with the above observation. Curves according to experimental results were drawn to make comparison with Stribeck curve. It was found that the friction coefficients were not simply determined by these three parameters, but also controlled by surface roughness and additives. Therefore, it is concluded that Stribeck curve is not applicable properly under high load, additive-added conditions.
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Book chapters on the topic "Ball-on-disk"

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Vancoille, E., J. P. Celis, L. Stals, and J. R. Roos. "Paper V (i) Modelling a Ball-on-Disk Experiment for the System 100Cr6 Steel Vs (Ti,X)N Coating." In Wear Particles: Frorn the Cradle to the Grave, Proceedings of the 18th Leeds-Lyon Symposium on Tribology, 193–202. Elsevier, 1992. http://dx.doi.org/10.1016/s0167-8922(08)70524-8.

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Becker, Richard C., and Frederick A. Spencer. "Valvular Heart Disease and Atrial Fibrillation." In Fibrinolytic and Antithrombotic Therapy. Oxford University Press, 2006. http://dx.doi.org/10.1093/oso/9780195155648.003.0027.

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There are an estimated 250,000 heart valve replacement surgeries performed yearly on a worldwide basis. Mechanical prostheses have an excellent track record of durability (25 years or more), but current models require lifelong anticoagulation. Improved hemodynamics and reduced thrombogenicity characterize bioprosthetic valves; however, there is the disadvantage of degeneration, particularly in younger individuals. The ideal replacement—a tissue engineered “copy” of a native valve—is under development. The most feared and devastating complications of native or prosthetic valvular heart disease for patients, clinicians, and surgeons are valve thrombosis and systemic embolism. Although the incidence of thromboembolic events has decreased in North America in parallel with the reduced occurrence of rheumatic heart disease, this has not been the case in other parts of the world. Moreover, despite the improvements in design and surgical techniques, thromboembolism remains a serious complication of prosthetic heart valve replacement. The risk of thromboembolism in patients with native valvular heart disease is influenced strongly by the site of involvement, chamber dimension, ventricular performance, and presence of concomitant risk factors such as atrial fibrillation. Prior thromboembolism is considered a strong risk factor for recurrent events regardless of the valvular pathology. The risk of thromboembolism in patients with prosthetic valvular heart disease is recognized. Despite methodologic limitations, the available information derived from relatively large studies and an ever-expanding clinical experience allows several conclusions to be drawn: . . . • Thromboprophylaxis for mechanical prostheses is achieved most effectively with oral anticoagulants. . . . . . . • Antiplatelet therapy alone does not offer adequate protection for patients with mechanical prostheses. . . . . . . • The thrombogenicity of mechanical heart valves, from greatest to least, is as follows: caged ball > tilting disk > bileaflet. . . . . . . • High-risk patients (increased risk for thromboembolism) benefit from combination (anticoagulant and platelet antagonist) antithrombotic therapy. . . . . . . • A “threshold” level of anticoagulation is required for benefit. . . . . . . • High-intensity anticoagulation (international normalized ratio [INR] >3.5) increases the risk for hemorrhagic complications. . . . . . . • The risk of thromboembolism following bioprosthetic heart valve replacement is greatest during the first 3 postoperative months (Acar et al., 1996; Horstkotte et al., 1994; Sethia et al., 1986; Vogt et al., 1990). . . .
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Conference papers on the topic "Ball-on-disk"

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Jimbert, P., M. Iturrondobeitia, J. Ibarretxe, and R. Fernandez-Martinez. "Pin on disk against ball on disk for the evaluation of wear improvement on cryo-treated metal cutting shears." In 4TH INTERNATIONAL CONGRESS IN ADVANCES IN APPLIED PHYSICS AND MATERIALS SCIENCE (APMAS 2014). AIP Publishing LLC, 2015. http://dx.doi.org/10.1063/1.4914239.

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Gu, Le, Guangze Tang, Chuanwei Zhang, Cuini Jing, and Liqin Wang. "Self-Lubricated Modification for Silicon Nitride Ceramic Ball Surface." In STLE/ASME 2010 International Joint Tribology Conference. ASMEDC, 2010. http://dx.doi.org/10.1115/ijtc2010-41161.

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Some thin films were prepared as solid lubricants on the surfaces of silicon nitride ceramic disk and ball. DLC film about 500–800 nm thickness was deposited on the ceramic surfaces using ion implantation and deposition technology. The surface roundness measure results, as well as 80 to 90 nm, showed that DLC film was shaped uniformly on the ceramic ball surfaces. The ball-on-disk tests showed DLC coating on silicon nitride surfaces could lead the friction coefficient to about 0.1 and endure about 7h at 1.5GPa and 30 mm/s. Ball milling technology was employed to prepare MoS2 film on the ceramic ball surfaces. The film thickness and tribological test results showed that the thin MoS2 film on the ball surfaces, which hardly changed the surface roughness, also improved their wear behaviors.
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Sung, Cheng-Kuo, Paul C. P. Chao, and Ben-Cheng Yo. "Effects of Nonlinear Damping Washers on the Automatic Ball Balancer for Optical Disk Drives." In ASME 2005 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. ASMEDC, 2005. http://dx.doi.org/10.1115/detc2005-84563.

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This study is devoted to explore the effect of nonlinear dynamics of damping washers on the dynamic performance of automatic ball balancer (ABB) system installed in optical disc drives. The ABB is generally used on rotational system to reduce vibration. Researches have been conducted to study the performance of the ABB by investigating the nonlinear dynamics of the system; however, the model adopted often consider the damping washer in a typical ABB suspension system as a linear one, which does not reflect the fact that the practical washers are inevitably exhibit nontrivial nonlinear dynamics at some range of operation, deviating the ABB performance away from the expecteds. In this study, a complete dynamic model of the ABB including a detailed nonlinear model of the damping washers based on experimental data for practical wahers is established. The method of multiple scales is then applied to formulate a scaled model to find all possible steady-state ball positions and analyze stabilities. It is found that with reasonable level of nonlinearity, the balancing balls of the ABB are still reside at the desired positions at steady state, rendering expected vibration reduction; however, jump phenomena also occurs as the spindle operated through natural frequency of the suspension, causing unwanted system vibrations. Numerical simulations and experiments are conducted to verify the theoretical findings. The obtained results are used to predict the level of residual vibration, with which the guidelines on choices of the nonlinear damping washers are distilled to achieve desired performance.
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Bai, Mingwu, and Stephen M. Hsu. "Experimental Study of High-Speed Contact at Head-Disk Interface in a Magnetic Hard Disk." In World Tribology Congress III. ASMEDC, 2005. http://dx.doi.org/10.1115/wtc2005-63285.

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Tribological performance of the head-disk interface will have significant impact on the performance and durability of the hard disk drive. A high-speed contact test method has been developed for the purpose of evaluating nanometer-thick lubricant film/carbon overcoats materials on hard-disk surfaces. Four different thickness overcoats were used in high speed contact experiments. High speed contact force was calculated based on the calibration of acoustic emission signal by proposed ball dropping tests. Acoustic emission analysis, frequency spectrum analysis, and surface morphology imaging were used to analyze the deformation and fracture at high speed contacted area. The availability of an experimental technique enables effective screening of different material chemistries and lubricant combinations to improve the level of protection for hard disk technology.
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Taura, Hiroo, Toshihiko Takaki, Masahiro Kawaguchi, Satoru Kaneko, and Takahisa Kato. "The Effect of Thin Lubricant Films on Acoustic Emission Characteristics." In World Tribology Congress III. ASMEDC, 2005. http://dx.doi.org/10.1115/wtc2005-64256.

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This paper shows the effect of ultrathin lubricant films between sliding bodies on Acoustic Emission (AE) signals induced by the sliding friction. Experiments were conducted with a ball-on-disk friction tester to measure the friction coefficient, the raw AE signals and the root-mean-squarevalues of the AE signals (the AErms signals). The ball was a glass ball of 5mm diameter. The disk was a magnetic disk used for 2.5 inch HDD with a DLC protective layer on its surface, and was coated with PFPE Z-dol 4000 about 1.5nm thick. The AErms signals kept a low level for some time after the start of the test, and then increased. Its time variation was similar to that of friction coefficient. After the friction test, the circumferential distribution of the lubricant film thickness was measured with an ellipsometer. The distribution demonstrated the reduction of the lubricant film thickness at the circumferential position where the magnitude of AE signals became large. These facts showed that the AE signals correlated well with the lubricant film thickness.
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Tanaka, Kentaro, Masahiro Kawaguchi, Takahisa Kato, and Katsumi Iwamoto. "Effects of Mobile and Chemically Bonded Molecules of Molecularly Thin Lubricant Film on the Vibrational Stability of a Sliding Ball." In ASME/STLE 2004 International Joint Tribology Conference. ASMEDC, 2004. http://dx.doi.org/10.1115/trib2004-64083.

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Lubrication by an extremely thin film has become very important in micro machines, magnetic recording disks and so on. Molecularly thin perfluoropolyether (PFPE) films are considered a good lubricant for these micro devices. When the thickness of the PFPE film is thinned to several nanometers, it is possible to assume that the film consists of mobile and chemically bonded molecules. In this paper, we investigated the role of these molecules from the viewpoint of the vibrational stability of the sliding ball with the disk surface. From experiments by the ball on disk type tribotester, it is found that chemically bonded molecules prevent direct contact between the slider and the disk surface. Furthermore, when mobile molecules exist on bonded molecules, the stability is improved in wide load range.
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Guilemany, J. M., J. M. De Paco, J. R. Miguel, and J. A. Calero. "The Use of the Scanning White Light Interferometry to Determine the Damage Produced in Wear Tests." In ITSC 1998, edited by Christian Coddet. ASM International, 1998. http://dx.doi.org/10.31399/asm.cp.itsc1998p0741.

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Abstract The ball-on-disk wear test is widely used in order to determine the sliding wear resistance behaviour of the samples. Although a great number of authors consider the ball-on-disk test to be far from the real situation, the results obtained permit to develop a preliminary idea about the wear behaviour of the tested samples. During the development of the ball-on-disk test a wear track is formed on the test specimen. Scanning white light interferometry can be used to determine the surface damage in the wear track by obtaining images which relate to the surface profile and general morphology. From measurements on interferometric profiles it is possible to determine accurately the track depth and width and hence the volume of the coating removed by wear. It is also possible to determine by optical microscopy the volume of metal lost from the ball. The results obtained have improved the general understanding of the energy absorption during wear and of the observed changes in the coefficient of friction. The results obtained have shown that with the coatings of WC-Co deposited by the HVOF process no volumetric changes occur when using a WC-6%Co sintered ball. Tests on coatings containing TiC or Cr3CZ as the carbide phase or stainless steel coatings show significant losses of material.
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Chao, Paul C. P., Chi-Wei Chiu, Cheng-Kuo Sung, and Hui-Chung Leu. "Effects of Rolling Friction of the Balancing Balls on the Automatic Ball Balancer for Optical Disk Drives." In ASME/STLE 2004 International Joint Tribology Conference. ASMEDC, 2004. http://dx.doi.org/10.1115/trib2004-64275.

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This study is devoted to evaluate the performance of an automatic ball-type balance system (ABB) installed in optical disk drives (ODD) with consideration of the rolling friction between the balancing balls and the ball-containing race of the ABB. Researches have been conducted to study the performance of the ABB by investigating the nonlinear dynamics of the system; however, the rolling friction model adopted was a simple stick-slip type, which does not reflect the true contact dynamics between rolling balls and their races, leading to an inaccuracy in predicting ABB performance. In this study, a complete dynamic model of the ABB including a detailed rolling friction model based on contact mechanics is established. The method of multiple scales is then applied to formulate a scaled model to find all possible steady-state ball positions and analyze stabilities. It is found that possible steady-state residing positions of the ball inside the race are multiple and form continuous ranges. Numerical simulations and experiments are conducted to verify the validness of the theoretical findings. The obtained results are used to predict the level of residual vibration, with which the guidelines on dimension design and material choices of the ABB are distilled to achieve desired performance.
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Brostow, W., S. Cygan, K. Czechowski, J. Kalisz, J. Laszkiewicz-Łukasik, and A. Łętocha. "Tribological Properties of (EN AW-AlCu4MgSi(A)) Aluminium Alloy Surface Layer After Ball Burnishing." In BALTTRIB 2015. Aleksandras Stulginskis University, 2015. http://dx.doi.org/10.15544/balttrib.2015.11.

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EN AW-AlCu4MgSi(A) aluminium alloy is widely used as a structural material in aerospace and automotive applications. We have subjected it to grinding, polishing and ball burnishing. We have performed ball-on-disk tribological tests. We have also determined normalized 3D roughness parameters. High surface smoothness turns out to be obtainable. Favorable effect of the ball burnishing on the tribological properties of the alloy are seen. Results will be presented at the Conference.
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10

Masuko, Masabumi, Hiroya Miyamoto, and Akihito Suzuki. "Shear Strength and Durability of Self Assembled Monolayer." In ASME/STLE 2007 International Joint Tribology Conference. ASMEDC, 2007. http://dx.doi.org/10.1115/ijtc2007-44221.

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Abstract:
A well-defined self-assembled monolayer (SAM) of octadecyltrichlorosilane (OTS) on a very smooth Si wafer or glass disk was prepared and the tribological performance was studied using a glass ball and a steel ball as a counter specimen. Shear strength and durability of OTS-SAM were discussed considering a difference of the surface roughness of specimen couples.
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