Tribological behavior between micro- and nano-crystalline diamond films under dry sliding and water lubrication
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Lubricity
Abrasion (mechanical)
Chemical Mechanical Planarization
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This study is paid attention to Electro-abrasive Polishing method which has both above electro polishing method and abrasive polishing method advantages to achieve high efficiency and high definition polishing processing, and conductive lapping tape was developed. Electro-abrasive Polishing for pure titanium materials by utilizing its tape was performed, and expectation and polishing characteristics experimentally were investigated. In this paper, abrasive materials which were applied to conductive lapping tape were changed and performed Electro-abrasive Polishing for pure titanium, effects of the abrasive materials on the polishing characteristics were cleared.
Lapping
Chemical Mechanical Planarization
Clearance
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Coefficient of friction
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The necessity of fixed abrasive CMP in polishing semiconductor materials processing was analyzed. Compared the shortcomings of traditional free abrasive polishing with the advantages of fixed abrasive polishing, the applications of fixed abrasive polishing technology in semiconductor processing were described. A variety of fixed abrasive polishing pad production methods were introduced. The development trend of fixed abrasive polishing was prospected.
Chemical Mechanical Planarization
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Coefficient of friction
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Experimental results of O-ring frictional force under dry friction and water lubrication were obtained using INSTRON,based on knowing the principle of dry friction and water lubrication.The relationship of frictional coefficient with load and sliding speed was analyzed.The results indicated that water film could be developed between contacting surfaces under water lubrication,which led to less frictional force and stability of performance.
Dry friction
Coefficient of friction
Static friction
Frictional coefficient
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Lubricity
Tribometer
Coefficient of friction
Boundary lubrication
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The Schwingungs Reibung and Verschleiss (SRV) test machine is widely used to measure the coefficient of friction of various lubricants, especially the coefficient of friction of engine oil. Testing temperature is usually below 300°C. In the conventional method, the coefficient of friction depends on heating time and heating temperature at higher temperature. A new method has been developed to measure the coefficient of friction for hot rolling oils that are operated above 300°C. A series of experimental tests are carried out to evaluate the new method. In this method, the coefficient of friction of base oils at higher temperature can be stably measured, and the effect of the additive agents on the coefficient of friction can be evaluated. Moreover, the difference between the coefficients of friction of commercial hot rolling oils can be evaluated by the new method.
Lubricity
Coefficient of friction
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Abrasive flow processing is a new kind of surface polishing technology which is widely used for processing complex cavity parts. This paper will systematically illustrate an outline about abrasive flow technology. In addition, it also dedicated to introduce the principle of processing as well as the development & application of abrasive flow. Furthermore, based on the study of Ultra-Precision polishing of the Micro-hole nozzle of the engine, a micro-hole flow polishing device was developed; the abrasive flow polishing fluid was prepared and the test of surface roughness for the micro-hole nozzle before polishing was finished successfully. At last, this paper takes effort to test the ultra-precision polishing of the abrasive flow nozzle.
Chemical Mechanical Planarization
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As the key part of energy power equipment of turbine, aircraft engines and so on, blade has high requirement on profile accuracy and surface quality. The abrasive belt polishing technology can ensure the profile accuracy and higher surface quality of the blade surface, and improve the blade processing efficiency. In this paper, the abrasive belt polishing process was analyzed by simulating single abrasive grain belt polishing process. The model of abrasive belt grain was constructed. The plastic finite element method was used to simulate the single abrasive grain polishing process. The simulation processing was determined according to the characteristics of blade abrasive belt polishing. The polishing process under different polishing parameters was simulated, and the variation curves of polishing forces of single abrasive grain under different polishing parameters were obtained. Based on the developed hybrid polishing mach ine tool for blade finishing, a testing system for abrasive belt polishing force was built. Through polishing experiments, the influence rule of polishing parameters on the polishing force of abrasive belt is obtained, and the correctness of the simulation is verified by the consistency of the rule.
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