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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 | 【原创论文】同侧和对侧大鼠睾丸缺血再灌注损伤的生化效应和褪黑激素对此的保护作用显示文摘睾丸扭转(TT),是一个多发于青春期男性的泌尿急症,如果不及时治疗,可致不孕不育。睾丸扭转所致缺血再灌注(I/R)损伤在睾丸损伤的病理生理过程中起一定作用。我们研究了褪黑激素在单侧睾丸扭转大鼠中同侧和对侧睾丸的氧化损伤效应:将21只青春期雄性Wistar大鼠分成三组,每组七只,处理如下:第1组(假手术组):行左睾丸和双边睾丸假切除术;第2组(I/R组):通过以下方式诱发缺血再灌注损伤(顺时针720°旋转左侧睾丸2小时,2小时后复位):第3组(I/R+MEL组):大鼠经诱导缺血再灌注损伤和一次性褪黑激素注射(50mgkg-1,i.p)。处理后离体分离各组大鼠双侧睾丸,用于检测睾丸组织中抗氧化过氧化氢酶、超氧化物歧化酶和谷胱甘肽过氧化物酶的活性,丙二醛、蛋白质羰基和一氧化氮的组织水平。较对照组,褪黑激素注射组同侧睾丸的脂质过氧化水平,相关酶活性降低,具有显著性(P〈0.05),而在对侧的睾丸中相关酶活性变化无统计学意义(P〉0.05)。在对侧睾丸中,丙二醛水平改变具有明显统计学意义(P=0.009)。应用褪黑素能减轻老鼠同侧睾丸扭转所致缺血再灌注损伤的不利影响,而对于对侧睾丸,睾丸扭转影响不大。 | Bekir S Parlaktas Dogan Atilgan Huseyin Ozyurt Yusuf Gencten Ali Akbas Fikret Erdemir Nihat Uluocak | 2014 | Asian Journal of Andrology2014，16，2： | 10 |
| 3 | 类金刚石膜超低摩擦行为的研究进展显示文摘近年来,高硬度、低摩擦、高耐磨性的类金刚石(Diamond like carbon,DLC)膜引起了国内外学术界和工业界极大的研究兴趣,尤其是它的超低摩擦行为。首先从宏观和微观角度分析了DLC膜超低摩擦的起源,研究发现DLC膜的微观结构和测试环境是影响DLC膜实现超低摩擦的主要因素,而DLC膜的微观结构由其制备工艺决定。然后系统讨论了制备工艺(包括制备方法、反应气源、掺杂元素和基体材料等)和测试环境(包括真空与干燥惰性气体环境、潮湿环境、高温环境、载荷和滑动速度等)对DLC膜超低摩擦行为的影响规律。最后归纳分析了目前对DLC膜超低摩擦机理的几种解释,指出DLC膜作为超低摩擦材料仍需解决的问题及未来的研究趋势。 | 曾群锋 曹倩 ERDEMIR Ali 李双江 朱家宁 | 2018 | 中国表面工程2018，31，4： | 9 |
| 4 | Nano-Structured Carbide-Derived Carbon Films and Their Tribology显示文摘Carbide-derived carbon (CDC) is a form of carbon produced by reacting metal carbides, such as SiC or TiC, with halogens at temperatures high enough to produce fast kinetics, but too low to permit the re- arrangement of the carbon atoms into an equilibrium graphitic structure. The structure of CDC is derivative of the original carbide structure and contains nanoscale porosity and both sp2 and sp3 bonded carbon in a variety of nanoscale structures. CDC can be produced as a thin film on hard carbides to improve their tri- bological performance. CDC coatings are distinguished by their low friction coefficients and high wear resis- tance in many important industrial environments and by their resistance to spallation and delamination. The tribology of CDC coatings on SiC surfaces is described in detail. | Michael McNallan Daniel Ersoy Ranyi Zhu Allen Lee Christopher White Sascha Welz Yury Gogotsi Ali Erdemir Andriy Kovalchenko | 2005 | Tsinghua Science and Technology2005，10，6： | 6 |
| 5 | 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 |
| 6 | Few layer graphene to reduce wear and friction on sliding steel surfaces显示文摘 | Diana Berman Ali Erdemir Anirudha V. Sumant | 2012 | Carbon2012，，： | 2 |
| 7 | Genesis of superlow friction and wear in diamondlike carbon films显示文摘 | Ali Erdemir | 2004 | Tribology International2004，，11： | 1 |
| 8 | The effect of laser surface texturing on transitions in lubrication regimes during unidirectional sliding contact显示文摘 | ANDRIY KOVALCHENKO OYELAYO AJAYI ALI ERDEMIR | 2005 | Tribology International2005，，38： | 1 |
| 9 | The effect of laser surface texturing on transitions in lubrication regimes during unidirectional sliding contact显示文摘 | Andriy Kovalchenko Oyelayo Ajayi Ali Erdemir George Fenske Izhak Etsion | 2004 | Tribology International2004，，3： | 1 |
| 10 | A Crystal Chemical Approach to the Formulation of Self-Lubricating Nanocomposite Coatings 显示文摘 | Ali Erdemir | 2005 | Surface & Coatings Technology2005，200，5： | 1 |
| 11 | The effect of laser surface texturing on transitions in lubrication regimes during unidirectional sliding contact 显示文摘 | Andriy Kovalchenko Oyelayo Ajayi Ali Erdemir er al | 2005 | Tribology International2005，38，： | 1 |
| 12 | Genesis of Superlow Friction and Wear in Diamondlike Carbon Films显示文摘 | Ali Erdemir | 2004 | Tribology International2004，，37： | 1 |
| 13 | A Crystal-Chemical Approach to Lubrication by Solid OxidKes显示文摘 | Ali Erdemir | | 0，，： | 1 |
| 14 | Analysis of plastic deformation in diamond like carbon films–steel substrate system with tribological tests显示文摘 | Qunfeng Zeng Osman Eryilmaz Ali Erdemir | 2011 | Thin Solid Films2011，，10： | 1 |
| 15 | Graphene: a new emerging lubricant显示文摘 | Diana Berman Ali Erdemir Anirudha V. Sumant | 2014 | Materials Today2014，，： | 1 |
| 16 | Guest editorial: Special issue on superlubricity显示文摘Energy and material losses due to friction and wear in mechanical systems account for huge economic and environmental burdens.Approximately one-third of the world’s primary energy consumption is attributed to friction;in addition,about 80%of the equipment failure is caused by wear in friction processes.Even relatively small improvements in the tribology of mechanical systems would reap enormous societal benefits.Superlubricity is a state in which two contacting surfaces exhibit almost no resistance to sliding,and the friction force between the two sliding surfaces nearly vanishes.Improvement of superlubricity technology and our understanding of its mechanism play an important role for saving energy in industry as well as our daily life.Consequently,superlubricity has attracted a large amount of attention from researchers in many fields,which is leading to a revolution in engineering technology. | Ali ERDEMIR Jianbin LUO | 2014 | Friction2014，2，2： | 1 |
| 17 | The effect of laser surface texturing on transitions in lubrication regimes during unidirectional sliding contact显示文摘 | Andriy Kovalchenko Oyelayo Ajayi Ali Erdemir | 2005 | Tribology International2005，38，： | 1 |
| 18 | The effect of laser surface texturing on transitions in lubrication regimes during unidirectional sliding contact 显示文摘 | Andriy Kovalchenko Oyelayo ajayi Ali Erdemir | 2005 | Tribology International2005，，38： | 1 |
| 19 | Fundamental understanding of the tribological and thermal behavior of Ag–MoS 2 nanoparticle-based multi-component lubricating system显示文摘 | Wenyang Zhang Dmytro Demydov Muhammad P. Jahan Kuldeep Mistry Ali Erdemir Ajay P. Malshe | 2012 | Wear2012，，： | 1 |
| 20 | Tribological analysis of TiN and DLC coated contacts by 3D FEM modelling and stress simulation显示文摘 | Kenneth Holmberg Helena Ronkainen Anssi Laukkanen Kim Wallin Ali Erdemir Osman Eryilmaz | 2007 | Wear2007，，9： | 1 |
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