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| 1 | Achieving superlubricity in DLC films by controlling bulk, surface, and tribochemistry显示文摘Superlubricity refers to a sliding regime in which contacting surfaces move over one another without generating much adhesion or friction[1].From a practical application point of view,this will be the most ideal tribological situation for many moving mechanical systems mainly because friction consumes large amounts of energy and causes greenhouse gas emissions[2].Superlubric sliding can also improve performance and durability of these systems.In this paper,we attempt to provide an overview of how controlled or targeted bulk,surface,or tribochemistry can lead to superlubricity in diamond-like carbon(DLC)films.Specifically,we show that how providing hydrogen into bulk and near surface regions as well as to sliding contact interfaces of DLC films can lead to super-low friction and wear.Incorporation of hydrogen into bulk DLC or near surface regions can be done during deposition or through hydrogen plasma treatment after the deposition.Hydrogen can also be fed into the sliding contact interfaces of DLCs during tribological testing to reduce friction.Due to favorable tribochemical interactions,these interfaces become very rich in hydrogen and thus provide super-low friction after a brief run-in period.Regardless of the method used,when sliding surfaces of DLC films are enriched in hydrogen,they then provide some of the lowest friction coefficients(i.e.,down to 0.001).Time-of-flight secondary ion mass spectrometer(TOF-SIMS)is used to gather evidence on the extent and nature of tribochemical interactions with hydrogen.Based on the tribological and surface analytical findings,we provide a mechanistic model for the critical role of hydrogen on superlubricity of DLC films. | Ali ERDEMIR Osman ERYILMAZ | 2014 | Friction2014，2，2： | 22 |
| 2 | Influence of preoperative coronary collateral circulation on in-hospital mortality in patients undergoing coronary artery bypass graft surgery with intra-aortic balloon pump support显示文摘 | Hasan Gungor Cemil Zencir Abraham Samuel Babu Cagdas Akgullu Ufuk Eryilmaz All Zorlu Mithat Selvi Sevil Onay Tunay Kurtoglu | 2014 | Chinese Medical Journal2014，，17： | 3 |
| 3 | Influence of tribofilm on superlubricity of highly-hydrogenated amorphous carbon films in inert gaseous environments显示文摘In this study,we mainly focus on the structural morphology and inter-atomic bonding state of tribofilms resulting from a highly-hydrogenated amorphous carbon(a-C:H) film in order to ascertain the underlying mechanisms for its superlubric behavior(i.e.,less than 0.01 friction coefficient).Specifically,we achieved superlubricity(i.e.,friction coefficients of down to 0.003) with this film in dry nitrogen and argon atmospheres especially when the tribo-pair is made of an a-C:H coated Si disk sliding against an a-C:H coated steel ball,while the a-C:H coated disk against uncoated ball does not provide superlubricity.We also found that the state of superlubricity is more stable in argon than in nitrogen and the formation of a smooth and uniformly-thick carbonaceous tribofilm appears to be one of the key factors for the realization of such superlubricity.Besides,the interfacial morphology of sliding test pairs and the atomic-scale bond structure of the carbon-based tribofilms also play an important role in the observed superlubric behavior of a-C:H films.Using Raman spectroscopy and high resolution transmission electron microscopy,we have compared the structural differences of the tribofilms produced on bare and a-C:H coated steel balls.For the a-C:H coated ball as mating material which provided superlow friction in argon,structural morphology of the tribofilm was similar or comparable to that of the original a-C:H coating;while for the bare steel ball,the sp^2-bonded C fraction in the tribofilm increased and a fingerprint-like nanocrystalline structure was detected by high resolution transmission electron microscopy(HRTEM).We also calculated the shear stresses for different tribofilms,and established a relationship between the magnitude of the shear stresses and the extent of sp^3-sp^2 phase transformation. | LIU ShuWei ZHANG ChenHui OSMAN Eryilmaz CHEN XinChun MA TianBao HU YanZhong LUO JianBin ALI Erdemir | 2016 | Science China(Technological Sciences)2016，59，12： | 2 |
| 4 | Asynchronous congestion control in multi-hop wireless networks with maximal matching-based scheduling 显示文摘 | Bui L Eryilmaz A Srikant R | 2008 | IEEE/ACM Trans on Networking2008，16，4： | 1 |
| 5 | Acute appendicitis during pregnancy显示文摘 | SahinM Bas G | 2002 | Dig Surg2002，19，1： | 1 |
| 6 | A study of the relation- ship between person-organization fit and employee creativity 显示文摘 | SaraqM Efil I Eryilmaz M | 2014 | Management Research Review2014，37，5： | 1 |
| 7 | D-dimer become a new diagnostic parameter for acute appendicitis显示文摘 | Mentes O Eryilmaz M Harlak A | 2009 | Am J Emerg Med2009，27，3： | 1 |
| 8 | Surface engineering to improve the durability and lubrieity of Ti-6A1-4V alloy 显示文摘 | Bansal D G Eryilmaz 0 L Blau P J | 2011 | Wear2011，271，910： | 1 |
| 9 | Temperature and water vapor pressure effects on the friction coefficient of hydrogenated diamondlike carbon films 显示文摘 | Dickrell P L Argibay N Eryilmaz O L | 2009 | Journal of Tribology2009，131，3： | 1 |
| 10 | Managementof lactational breast abscesses 显示文摘 | Eryilmaz R Sahin M Hakan Tekelioglu M | 2005 | Breast2005，14，5： | 1 |
| 11 | Determination of the Width of the Pre-sacral Space on Magnetic Resonance Imaging 显示文摘 | Aytekin OYO Borapeynircioglu Muzaffer Eryilmaz | 2004 | Clinical Anatomy2004，17，： | 1 |
| 12 | Joint congestion control, routing, and MAC for stability and fairness in wireless networks显示文摘 | ERYILMAZ A SRIKANT R | 2006 | IEEE Journal on Selected Areas in Communications2006，24，8： | 1 |
| 13 | On the delay and throughput gains of coding in unreliable networks 显示文摘 | Eryilmaz A Ozdaglar A Mtdard M | 2008 | IEEE Transactions on Information Theory2008，54，12： | 1 |
| 14 | Management of lactational breast abscesses显示文摘 | Ramazan Eryilmaz Mustafa Sahin M. Hakan Tekelioglu Emin Daldal | 2005 | The Breast2005，，5： | 1 |
| 15 | Control of multi-hop communi- cation networks for inter-session network coding 显示文摘 | Eryilmaz A Lun D Swapna B | 2011 | n F F Transactions on Information Theory2011，57，2： | 1 |
| 16 | Odontogenic keratocyst:an unusual location and review of the literature 显示文摘 | Eryilmaz T Ozmen S Findikcioglu K | 2009 | Ann Plast Surg2009，62，2： | 1 |
| 17 | Control of Multi-Hop Communication Networks for Inter-Session Network Coding显示文摘 | ERYILMAZ A LUN D S SPAWNA B T | 2011 | IEEE Transactions on Information Theory2011，57，2： | 1 |
| 18 | Leveraging A Personalized System to Improve Self-Directed Learning in Online Educational Environments显示文摘 | Rosemary Kim Lorne Olfman Terry Ryan Evren Eryilmaz | 2014 | Computers & Education2014，70，1： | 1 |
| 19 | Sexual functioning after renal transplantation 显示文摘 | Ozdemir C Eryilmaz M Yurtman F | 2007 | Transplant Proc2007，39，5： | 1 |
| 20 | Quality of sleep and quality of life in renal transplantation patients 显示文摘 | Eryilmaz M M Ozdemir C Yurtman F | 2005 | Transplant Proc2005，37，5： | 1 |
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