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  • 1
    Electronic Resource
    Electronic Resource
    Analysis of Mechanical Property of Crystal KDP and Simulation of Ultra-Precision Cutting Process in the Ductile Mode (2007)
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 329 (Jan. 2007), p. 427-432 
    Details
    ISSN: 1013-9826
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: In order to study mechanical property with different crystal-plane and different crystalorientation of the crystal KDP, nano-indentation experiments are first done. The mechanicalproperties of crystal KDP, such as elastic modulus, yielding stress, are obtained from the analysis ofthe experimental curve. To obtatin the stress-strain curves of crystal KDP, by using the spherical tipcan get characteristic of continuous strain, the spherical indentation experiments is proposed firstlyand carried out. According to obtained parameters, A finite element cutting model of crystal KDP isestablished. The cutting process of crystal KDP is simulated by the model, and the influence of rakeangle and depth of cut on chip and surface quality is studied. The theory shows that when thecutter’s rake angle is in the range of -40° to -45°, an perfect super-smooth KDP crystal surface willbe obtained. Finaly, the experiments is carried out on special ultra-precision machine tool for crystalKDP by ourself devoloping. Experiment results show that when the cutter’s rake angle is about -45°,an super-smooth surface (rms: 6.521nm and Ra: 5.151nm )is obtained on the plane (001), and thisexperiment certified correctness of theory analysis
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/52/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.329.427.pdf
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  • 2
    Electronic Resource
    Electronic Resource
    Molecular Dynamic Simulation Study of AFM Single-Wall Carbon Nanotube Tip-Surface Interactions (2007)
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 339 (May 2007), p. 206-210 
    Details
    ISSN: 1013-9826
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Carbon nanotubes (CNTs) represent ideal Atomic Force Microscope (AFM) tip materialsdue to their remarkable mechanical properties. Dynamic interactions of a Single-wall Carbonnanotube (SWCNT) indenting towards a monocrystalline hydrogen-free Silicon surface (001) areinvestigated using molecular dynamic simulation. The critical strain and strain force along the axisof the tube from elastic to plastic regimes are calculated. The simulation shows the deform processin elastic regimes is similar to the process of two ends inward compressed. The atoms of nanotubetip adsorption to the Silicon surface has been observed in the plastic regimes. The mechanicalmicroprocess of AFM’s single-wall Carbon nanotube tip and Silicon surface interactions fromelastic to plastic regimes can be well comprehended from the view of nanoscale energetic evolution
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/53/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.339.206.pdf
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  • 3
    Electronic Resource
    Electronic Resource
    Nanometer Positioning in the Presence of Friction (2007)
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 339 (May 2007), p. 217-222 
    Details
    ISSN: 1013-9826
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: This paper deals with nanometer positioning in the presence of friction. The objectstudied is a ball-screw-driven and linear-ball-guide-supported table system. For this system, thefriction dominates the resulting performance for micro-motion and the system exhibitsmicrodynamic characteristic which is rather different from macrodynamics. Inherently a controllerwith high loop-gain is needed to suppress the effect of friction. A PID controller is designed for thetable system for step height smaller than 10μm. Experiment and simulation results indicate that thePID controller can provide a sufficiently high-loop gain and effect of friction is suppressed. Inpoint-to-point(PTP) positioning for step heights from 10μm down to 10nm, the positioning error iswithin ±2 nm and the response dynamics is satisfactory
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/53/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.339.217.pdf
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  • 4
    Electronic Resource
    Electronic Resource
    MD Analysis on Tip Geometry Effects in AFM-Based Lithography Process (2007)
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 339 (May 2007), p. 228-233 
    Details
    ISSN: 1013-9826
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: A three dimensional molecular dynamics model is employed to simulate AFM-basedlithography process. To investigate effects of tip geometry, three kinds of tip models are proposed:a cone-shape tip with a hemisphere at the end, a round-edged three sided pyramid tip with ahemisphere at the end and a sharp-edged three sided pyramid tip. These models simulate scratchingbehaviors of AFM tip at different scratching depths. Results showed that materials removalbehavior and scratching forces were significantly affected by tip geometry, depending on thescratching depth and scratching directions. The specific energy using a sharp-edged three sidedpyramid tip displayed a different behavior comparing to that using a round-edged three sidedpyramid. However, scratching orientations exhibited no effects on the specific energy
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/53/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.339.228.pdf
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  • 5
    Electronic Resource
    Electronic Resource
    Three-Dimensional Finite Element Analysis on Precision Cutting for Tool with Nose Radius Considering Tool Edge Radius (2007)
    s.l. ; Stafa-Zurich, Switzerland
    Applied mechanics and materials Vol. 10-12 (Dec. 2007), p. 923-927 
    Details
    ISSN: 1662-7482
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: The finite element modeling and experimental validation of three-dimensional precisioncutting of 3J33 maraging are presented. The commercial software MARC applied for the finiteelement modeling is studied the effect of tool nose radii considering tool edge radius on theprincipal cutting forces and the temperature fields. The model employs an updated Lagrangianformulation. The friction between the tool and the chip is assumed to follow a modified Coulombfriction law and the adaptive remeshing technique is using for the formation of chip. The tool edgeradius significantly affects the cutting forces and the maximum temperature of the chip. Thesimulation results for tool with nose radius considering tool edge radius are compared withexperimentally measured data and found to be in good agreement
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/38/transtech_doi~10.4028%252Fwww.scientific.net%252FAMM.10-12.923.pdf
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  • 6
    Electronic Resource
    Electronic Resource
    Research on Influence of the Cutter Rake Angle to the Surface Quality during SPDT Machining of Crystal KDP (2007)
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 339 (May 2007), p. 1-5 
    Details
    ISSN: 1013-9826
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Influence of the cutter rake angle to the surface quality of crystal KDP is analyzedtheoretically in this paper. Analysis result shows that the tension stress reaches minimum in thecrystal KDP cutting region and optimal value of the surface quality is obtained as cutter rake angleis about -45°. Cutting experimental of different cutter rake angle is realized on the machine tool.Experimental results show that the surface roughness of the crystal KDP reach minimum (rms is6.521nm, Ra is 5.151nm) as the cutter rake angle is about -45°, this experiment certifies thecorrectness of this theory analysis. Theory analysis and experimental results show that influence ofthe cutter rake angle to surface quality of the crystal KDP is very large, for ultra-precisionmachining of the crystal KDP, when large negative rake diamond cutter (-45°) is adopted, thesuper-smooth surface can be obtained
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/53/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.339.1.pdf
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  • 7
    Electronic Resource
    Electronic Resource
    Surface Roughness Prediction Based on Cutting Parameters and Nose Radius in Precision Turning (2007)
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 329 (Jan. 2007), p. 539-544 
    Details
    ISSN: 1013-9826
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: In precision turning, the quality of surface finish is an important requirement formachined workpiece. Thus, the choice of optimal cutting parameters is very important forcontrolling the required surface quality. The focus of the present study is to find a correlationbetween surface roughness and cutting parameters (feed rate, depth of cut) and nose radius inturning 3J33 maraging steel, and to derive mathematical models for the predicted surface roughnessbased on both of cutting parameters and nose radius. The experimental design is carried out usingthe quadratic rotary combination design. The regression analysis shows feed rate and nose radiusinfluence surface roughness significantly. With F-ratio test the proposed model is adequate. Themethod could be useful in predicting roughness parameters as a function of cutting parameters andnose radius
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/52/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.329.539.pdf
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  • 8
    Electronic Resource
    Electronic Resource
    Fabrication of Patterned Metal Films on Organic Substrates by Transfer Printing (2006)
    s.l. ; Stafa-Zurich, Switzerland
    Materials science forum Vol. 532-533 (Dec. 2006), p. 524-527 
    Details
    ISSN: 1662-9752
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Here a simple and direct method based on transfer printing has beep developed, in whichrigid stamps transfer metal films deposited on the relief surface of the stamps onto patterned organicsubstrates. Ultra-precision machining technology is combined with conventional photolithography tofabricate patterned Si stamps and organic substrates by replica molding. Experiment results indicatethat patterned metal films on Silicon stamps were successfully transferred onto PDMS substrates.Fabrication of patterned metal films on organic substrates by transfer printing may suit for fabricatingsub-micrometer and nanometer scale features in a single process
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/02/14/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.532-533.524.pdf
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  • 9
    Electronic Resource
    Electronic Resource
    The Study of Collateral Damages in the Process of Femtosecond Laser Micromachining Single-Crystalline Silicon (2006)
    s.l. ; Stafa-Zurich, Switzerland
    Materials science forum Vol. 532-533 (Dec. 2006), p. 560-563 
    Details
    ISSN: 1662-9752
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Femtosecond laser pulses are irradiated on a single-side polished single-crystalline siliconwafer. Metamorphic zone appears around the ablated zone and the morphology changes gradually inthe metamorphic zone. Typical phenomena of thermal ablation such as melt-resolidification andsubtransparent glassy materials occur in the marginal area of the ablated zone. No apparent changesare found among microscopic morphologies of the ablated, metamorphic and unirradiated zones.There are flaws and spallations on the smooth back surface of the wafer, which are caused by thestress inside the sample. Nanomechanical properties of the sample surface hardly change in the smallscope of the backside around the ablated zone. While regular changes occur in large scope, which isthe conjunct result of such stresses caused by many different collateral damages
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/02/14/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.532-533.560.pdf
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  • 10
    Electronic Resource
    Electronic Resource
    Study Morphology Transitions in Self-Assembled Triblock Copolymer Thin Films with Nanostructures by AFM (2006)
    s.l. ; Stafa-Zurich, Switzerland
    Materials science forum Vol. 532-533 (Dec. 2006), p. 165-168 
    Details
    ISSN: 1662-9752
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: As a “bottom-up” approach to nanostructures for nanofabrication, self-assembled blockcopolymer thin films have received much attention not only thanks to the scale of the microdomainsbut also due to the convenient shape tunability. In order to realize applications of self-assembledblock copolymer thin films in nanotechnologies, control over microdomain spatial and orientationalorder is paramount. In this paper, using atomic force microscopy (AFM), we studied systemicallynanostructure transitions induced by post-solvent annealing in self-assembled block copolymer thinfilms. Furthermore, a variety of thin films with well-ordered nanostructures, which can be employedas templates for nanotechnologies, have been realized simply and at low cost
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/02/14/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.532-533.165.pdf
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