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As^+,B^+离子注入硅的结构和摩擦学性能 总被引:1,自引:0,他引:1
利用XRD、XPS、AES分析了As^+、B^+离子注入后的硅的表面成分,结构和化学状态,并通过AFM/FFM和SRV实验测量了As^+、B^+离子注入硅的微观摩擦和宏观摩擦磨损性能。结果表明,As^+、B+离子注入后,单晶硅表面仍呈晶态,表面粘着力、微观及宏观摩擦系数增大,同时耐磨损能力增强, 观与宏观摩擦在损特性的规律基本一致。 相似文献
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镍合金增强MoS2基自润滑复合材料的组织与摩擦学性能 总被引:5,自引:0,他引:5
本文以Ni-Cr高温合金粉的MoS2粉为原料,用热压法制成了镍合金增强MoS2基自润滑复合材料,借助X射线衍射仪和扫描电镜,分析了材料的组织结构;用SRV高温摩擦磨损试验机考察也材料在室温和250℃时的摩擦学性能。试验结果表明,Ni-Cr合金易与MoS2反应,生成结构复杂的Cr(N)Mo2S4相。该反应物在室温下表现出较好的转移润滑特性,但在250 ℃时明显谈判。因此,要保证复合材料在室温和250 相似文献
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摩擦磨损试验表明,化学镀Ni-P合金镀层(基体为调质45钢)与油溶性有机钼添加剂(MoDTC)有良好的协同效应,如Ni-P合金镀层(热处理,油中加MoDTC)比45钢基础油润滑下,摩擦系数降低41.5%,耐磨性提高7倍,采用电子探针等研究了其摩擦磨损机理,结果表明,上述协同效应取决于摩擦表面所形成的MoS2保护膜,Ni-P合金镀层的高硬度及其特殊的组织结构。 相似文献
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Si3N4/MoSi2陶瓷的制备工艺与组织研究 总被引:4,自引:1,他引:3
研究了Si3N4/MoSi2复合陶瓷材料的特殊制备工艺及其显微结构的变化。用XRD、SEM、EDXS及气孔率测试仪,对每一制备步骤中发生的显微结构变化进行了分析。 相似文献
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ObjectARX中应用MFC的两个关键技术问题探讨 总被引:1,自引:0,他引:1
讨论了ObjectARX中应用MFC(Microsoft Foundation Classes)的两个关键技术问题:1.多文档-视(Document-View)结构在AutoCAD内部的实现技术。2.MFC中的控件在AutoCAD内部的实现技术。两项技术已成功应用在作者所开发的基于MFC的大型ObjectARX软件包中。 相似文献
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湿热大气环境对MoS2润滑薄膜的摩擦学性能有严重的劣化作用。采用非平衡磁控溅射技术成功制备了WS2掺杂MoS2复合薄膜,研究发现,MoS2基体中掺入少量WS2可以诱导MoS2沿(002)晶面择优生长,薄膜结构变得更加致密,显著抑制腐蚀介质的渗透和扩散,使MoS2/WS2复合薄膜展现出高盐雾耐蚀性、小摩擦因数和低磨损率。成分优化的MoS2-1.6%WS2(原子分数)复合薄膜在经历4天的盐雾试验后仅表层被氧化,仍能保持0.16的小摩擦因数和3.80 × 10-6 mm3/(N·m)的低磨损率。 相似文献
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采用射频磁控溅射技术制备MoS2-Sb2O3复合薄膜,研究靶功率对薄膜性能和结构的影响。利用XRD、XRF分析薄膜的成分和结构,用CSM薄膜综合性能仪测试薄膜的硬度及附着力,通过承载力试验测试薄膜的承载性能,使用真空球-盘摩擦试验机测试真空和大气下薄膜的摩擦因数及耐磨寿命。结果表明:使用射频磁控溅射制备的MoS2-Sb2O3复合薄膜具有准非晶结构,其薄膜结构和成分受沉积时的靶功率影响;MoS2-Sb2O3复合薄膜在真空下具有比大气下更稳定的摩擦学性能,更长的耐磨寿命;提高溅射原子能量能有效地提高MoS2-Sb2O3复合薄膜的承载性能,减少薄膜的内应力,提高薄膜的附着力,提高薄膜的耐磨寿命。 相似文献
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MoS2基纳米复合薄膜具有良好的摩擦学性能,但较差的导电性能限制了其在载流条件下作为润滑材料的应用。为提高MoS2基纳米复合薄膜的导电性能,采用非平衡磁控溅射系统沉积2种不同Ag含量的MoS2/Ag纳米复合薄膜,并在不同的电流条件下研究MoS2/Ag纳米复合薄膜与GCr15钢球对摩时的摩擦学性能。结果表明:在载流下2种MoS2/Ag纳米复合薄膜表现出相似的摩擦性能,而低掺杂MoS2/Ag薄膜具有更佳的耐磨性能,这归因于低掺杂MoS2/Ag薄膜具有较好的力学性能;无载流时,MoS2/Ag纳米复合薄膜在摩擦过程中生成的氧化物颗粒增加了磨损、降低了润滑性,磨损机制主要为磨粒磨损;电流小于0.5 A时,电流促进了转移膜形成,使得摩擦因数降低,但磨损率增加,磨损机制主要为黏着磨损;当电流大于0.5 A时,由于电弧烧蚀加速了薄膜的磨损,磨损机制主要为磨粒磨损、黏着磨损和电弧腐蚀磨损。 相似文献
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Ionic liquids (ILs) are considered as a new kind of lubricant for micro/nanoelectromechanical system (M/NEMS) due to their
excellent thermal and electrical conductivity. However, so far, only few reports have investigated the tribological behavior
of molecular thin films of various ILs. Evaluating the nanoscale tribological performance of ILs when applied as a few nanometers-thick
film on a substrate is a critical step for their application in MEMS/NEMS devices. To this end, four kinds of ionic liquid
carrying methyl, hydroxyl, nitrile, and carboxyl group were synthesized and these molecular thin films were prepared on single
crystal silicon wafer by dip-coating method. Film thickness was determined by ellipsometric method. The chemical composition
and morphology were characterized by the means of multi-technique X-ray photoelectron spectrometric analysis, and atomic force
microscopic (AFM) analysis, respectively. The nano- and microtribological properties of the ionic liquid films were investigated.
The morphologies of wear tracks of IL films were examined using a 3D non-contact interferometric microscope. The influence
of temperature on friction and adhesion behavior at nanoscale, and the effect of sliding frequency and load on friction coefficient,
load bearing capacity, and anti-wear durability at microscale were studied. Corresponding tribological mechanisms of IL films
were investigated by AFM and ball-on-plane microtribotester. Friction reduction, adhesion resistance, and durability of IL
films were dependent on their cation chemical structures, wettability, and ambient environment. 相似文献
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多组元复合是提高润滑薄膜苛刻工况下服役性能的有效方法。采用“射频磁控溅射+低温离子渗硫”复合工艺,在9Cr18轴承钢表面制备了Mo/MoS2-Pb-PbS复合固体润滑薄膜;利用自主研制的MSTS-1型多功能真空摩擦磨损试验机研究了8×10-5 Pa真空条件下法向载荷和滑动速率对Mo/MoS2-Pb-PbS复合薄膜摩擦学性能的影响。结果表明,在所设定的5种滑动速率下,Mo/MoS2-Pb-PbS薄膜的摩擦因数随滑动速率的增大而缓慢减小,磨损率经一定周次的跑合后逐渐趋于稳定;在不同的法向载荷下,随着载荷的增大,薄膜的摩擦因数呈近似抛物线增大,变化范围在0.03~0.24之间;薄膜表面的磨痕宽度同样随着载荷的增大而增大。 相似文献
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The lubricating properties of molybdenum disulphide (MoS2) microspheres modified by Cyanex 302 (bis(2,4,4-trimethylpentyl) monothiophosphinic acid) in base oil 500SN were investigated and compared with those of commercial colloidal MoS2 on a four-ball tester and an Optimol SRV oscillating friction and wear tester in a ball-on-disc contact configuration. The worn surfaces of the flat disc lubricated with the additive-containing base oil were analysed by means of X-ray photoelectron spectroscope and scanning electron microscopy. The MoS2 microspheres showed much better extreme pressure properties and anti-wear and friction-reduction properties in 500SN than commercial colloidal MoS2. The effective chemical adsorption and protection film formed by the active elements (S and P) and long chain alkyls in Cyanex 302 and boundary-lubricating transfer film of thin sheets containing the solid lubricant particles (tribochemical products) of the additives could account for the boundary lubrication mechanism. Copyright © 2006 John Wiley & Sons, Ltd. 相似文献
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用射频磁控溅射法在GCr15钢表面制得了MoS2薄膜。通过扫描电镜、摩擦磨损以及划痕试验仪研究了工艺参数对薄膜形貌和性能的影响。结果表明:采用射频溅射法,在功率200W、工作气压3Pa、时间2h条件下制备的MoS2薄膜性能最佳;沉积过程中沉积原子从衬底表面获得足够的扩散能量时薄膜按层状模式生长,扩散能量不足时薄膜按层岛复合模式生长;MoS2薄膜摩擦因数低,具有优良的摩擦学特性。 相似文献