Variations of a Ni-P Surface Layer After Nanoparticle Impacts

2005 ◽  
Author(s):  
J. Xu ◽  
J. B. Luo ◽  
G. S. Pan ◽  
W. Zhang ◽  
X. C. Lu
Keyword(s):  
Surface Layer ◽  
Microscopic Examination ◽  
Wear Mechanisms ◽  
Erosive Wear ◽  
Experimental Results ◽  
Phosphorus Concentration ◽  
Fluid Medium ◽  
Abrasive Particles ◽  
Nano Scale ◽  
Surface Collision

In CMP, erosive wear regarded as one of the wear mechanisms underlying the interaction between the abrasive particles and polished surfaces can occur when materials are removed from surface collision of particles which are carried by a fluid medium. In this paper, the microscopic examination of the NiP coatings after nanoparticle impacts is performed. The experimental results indicate that craters and scratches can be observed in the surface after nanoparticle impacts, and crystal grains in nano-scale and element phosphorus concentration can be found in the sub-surface layer of the impacted surface.

Determination of Permeability Properties of Concrete Surface Modified by CPF

2015 ◽  
Vol 732 ◽  
pp. 389-392 ◽  
Author(s):  
Pavel Reiterman
Keyword(s):  
Surface Layer ◽  
Water Transport ◽  
Concrete Surface ◽  
Experimental Results ◽  
Experimental Program ◽  
Functional Characteristics ◽  
Concrete Permeability ◽  
Surface Modified ◽  
Durability Of Concrete

The paper introduces an experimental program focused on the monitoring of water transport in surface layer of concrete aimed at monitoring the permeability of concrete, since concrete permeability is a property uniquely affecting durability of concrete. Introduced methods are complemented by experimental results and other traditional tests. These findings will serve to further optimization of the structure being created, thus ensuring its better aesthetic and functional characteristics.

Theoretical and experimental studies of the oil film in lubricated point contact

1966 ◽  
Vol 291 (1427) ◽  
pp. 520-536 ◽  
Keyword(s):  
Surface Layer ◽  
Film Thickness ◽  
Strong Evidence ◽  
Experimental Studies ◽  
Point Contact ◽  
Elastohydrodynamic Lubrication ◽  
Experimental Results ◽  
Point Contacts ◽  
Previous Theory ◽  
Oil Film

A technique using Newton’s rings for mapping the oil film of lubricated point contacts is described. A theoretical value for the film thickness of such contacts in elastohydrodynamic lubrication is derived. The experimental results give the exit constriction predicted by previous theory but never shown in detail. The comparison of theoretical and experimental oil film thicknesses, which is satisfactorily accurate, gives strong evidence for a viscous surface layer some 1000Å thick. This film agrees with the known ‘lubricating power’ of the various oils tested.

Studies of Micro-Hole Burr Improvement for Aluminum Alloy Materials Using Vibrated Abrasive Grinding Machining

2015 ◽  
Vol 642 ◽  
pp. 202-206 ◽  
Author(s):  
Shie Chen Yang ◽  
Tsuo Fei Mao ◽  
Feng Che Tsai ◽  
Hsi Chuan Huang
Keyword(s):  
Image Processing ◽  
Aluminum Alloy ◽  
Material Properties ◽  
Vertical Direction ◽  
Experimental Results ◽  
Processing Technology ◽  
Vibration Energy ◽  
Abrasive Particles ◽  
Image Processing Technology ◽  
Micro Hole

This study investigated the removal improvement of micro burrs of aluminum alloy materials using vibrated abrasive grinding machining. The image processing technology is used to examine and quantify the micro-hole burr profiles. The experimental results show that the micro burr was uniformly removed as the workpiece is fixture with vertical direction. In addition, the burr removal improvements are effectively influenced by the flowing velocity and the vibration energy of abrasive particles. The flowing velocities are dependent on the size and gravity of the abrasives and the vibration energy is determined by the material properties and the hardness of the abrasives.

scholarly journals The Correlation between Surface Tracking and Partial Discharge Characteristics on Pressboard Surface Immersed in MIDEL eN

2017 ◽  
Vol 7 (2) ◽  
pp. 631 ◽  
Author(s):  
Nur Amirah Othman ◽  
Hidayat Zainuddin ◽  
Aminuddin Aman ◽  
Sharin Abd Ghani ◽  
Imran Sutan Chairul
Keyword(s):  
Surface Layer ◽  
Monitoring System ◽  
Condition Monitoring ◽  
Partial Discharge ◽  
Experimental Results ◽  
Surface Discharge ◽  
Discharge Characteristics ◽  
Surface Tracking ◽  
Tracking Process ◽  
Condition Monitoring System

This paper presents the investigation of the surface tracking on pressboard surface immersed in MIDEL eN oil.  In this work, the development of surface discharge was analyzed by correlating the visual records of surface tracking on impregnated pressboard and the partial discharge (PD) activities.  The PD activities during the surface tracking process were analyzed in terms of Phase Resolved Partial Discharge (PRPD) patterns.  Throughout the experiment, surface discharge is found as the development of tree-like patterns in the form of white marks occurring on the oil-pressboard interface.  This phenomenon is generally accepted as the drying out process that involves evaporation and decomposition of the oil molecules in the pressboard pores due to the surface discharge activities on the pressboard surface layer.  The development of surface discharge on the pressboard surface can continue from minutes to months or even years until failure.  Thus, condition monitoring system is important to characterize this type of faulty condition.  The experimental results show that there is the decreasing trend of PD magnitude during the development of white mark hallway of a gap distance which is eventually suffered from an unexpected fault.

Formation of the Properties of the Surface Layer during Multi-Stage Milling

2019 ◽  
Vol 973 ◽  
pp. 115-119
Author(s):  
Juliy L. Chigirinskiy ◽  
Ngo Quang Trong ◽  
Ivan V. Firsov
Keyword(s):  
Surface Layer ◽  
Open Access ◽  
Experimental Studies ◽  
Structural Materials ◽  
Experimental Results ◽  
Open Access Publishing ◽  
Multi Stage ◽  
Defective Layer ◽  
Logical Change

The paper provides the results of experimental studies of changes in the depth of the defective layer during milling of various structural materials; shows the convergence of the experimental results with the data published in open-access publishing; substantiates a logical change in the depth of the defective layer at various stages of multi-stage machining; and builds probabilistic tables of milling accuracy.

scholarly journals Cu(I) Modification duringγ-Fe2O3Nanoparticles Synthesis and Subsequent Characterization

2015 ◽  
Vol 2015 ◽  
pp. 1-9 ◽  
Author(s):  
Hong Mao ◽  
Xiaoyan Qiu ◽  
Decai Li ◽  
Yueqiang Lin ◽  
Xiaodong Liu ◽  
...  
Keyword(s):  
Surface Layer ◽  
Interface Layer ◽  
Unit Cell ◽  
Experimental Results ◽  
Composite Nanoparticles ◽  
Chemically Induced ◽  
Effective Magnetization

During the synthesis of theγ-Fe2O3nanoparticles via the chemically induced transition method, Cu(I) modification has been attempted by adding CuCl/NaOH to the treatment solution. The experimental results showed that, under the condition of a NaOH content equal to 0.04 moles, when the content of CuCl is as low as1.25×10-3or2.50×10-3moles, the products are singleγ-Fe2O3/Cu(I)FeO2/FeCl3·6H2O composite nanoparticles, whereas when the content of CuCl is higher,5×10-2moles, the product is a mixture consisting ofγ-Fe2O3/Cu(I)FeO2/FeCl3·6H2O nanoparticles and Cu(II)(OH)Cl nanoparticles. For theγ-Fe2O3/Cu(I)FeO2/FeCl3·6H2O composite nanoparticles, the Cu(I)FeO2interface layer is not thick enough to form one unit cell, but it can modify the formation of a FeCl3·6H2O surface layer and the effective magnetization of theγ-Fe2O3core.

Tribological Characteristics of Nano Structured Nickel Coatings for Renivating of Extruding Shafts

2012 ◽  
Vol 217-219 ◽  
pp. 221-225 ◽  
Author(s):  
Dimitar Karastoyanov ◽  
Todor Penchev ◽  
Mara Kandeva
Keyword(s):  
Wear Resistance ◽  
Surface Layer ◽  
Contact Interaction ◽  
Dry Friction ◽  
Experimental Results ◽  
Tribological Characteristics ◽  
Resistance Testing ◽  
Temperature Changes ◽  
Wear Process ◽  
Nickel Coatings

The methods for wear resistance testing is described and the experimental results for the dependence of the massive wear, wear speed, intensity of wear and wear resistance on the friction road and the time of a contact interaction are obtained. A testing micromanipulator with piezo actuators for measuring the roughness of the surface layer is developed. A methodology for thermographic testing and experimental results for wear and temperature changes in the contact by the wear process of the coatings under dry friction and abrasion is obtained

Control of MEMS Nanopositioners With Nano-Scale Resolution

2006 ◽  
Author(s):  
Jason J. Gorman ◽  
Yong-Sik Kim ◽  
Nicholas G. Dagalakis
Keyword(s):  
Data Storage ◽  
Scanning Probe Microscopy ◽  
Dynamic Models ◽  
Beam Steering ◽  
Open Loop ◽  
Experimental Results ◽  
Scanning Probe ◽  
Flexure Mechanism ◽  
Nano Scale ◽  
Ultra Precision

Several approaches for the precision control of micro-scale positioning mechanisms, or MEMS nanopositioners, are presented along with initial experimental results which demonstrate nano-scale positioning resolution. The MEMS nanopositioners discussed in this paper are novel precision mechanisms comprised of a bent-beam thermal actuator and a flexure mechanism for each degree of freedom (DOF). These mechanisms can be used for a host of ultra-precision positioning applications, including nanomanipulation, scanning probe microscopy, high-density data storage and beam steering arrays. Concentrating on a 1 DOF MEMS nanopositioner, empirical static and dynamic models have been derived using characterization data obtained from experiments with optical and laser probe microscopes. Based on these models, three control approaches have been developed: 1) a quasi-static nonlinear open-loop controller, 2) a nonlinear forward compensator, and 3) a nonlinear PI controller. Simulation and initial experimental results are presented, and the benefits of each of these approaches are discussed.

Abrasive wear mechanisms of multi-components ferrous alloys abraded by soft, fine abrasive particles

Wear ◽  
2010 ◽  
Vol 269 (11-12) ◽  
pp. 911-920 ◽  
Author(s):  
José Daniel B. de Mello ◽  
Andreas A. Polycarpou
Keyword(s):  
Abrasive Wear ◽  
Wear Mechanisms ◽  
Ferrous Alloys ◽  
Abrasive Particles

Chemical Wear of Cu CMP

2000 ◽  
Vol 613 ◽  
Author(s):  
Hong Liang
Keyword(s):  
Copper Oxide ◽  
Surface Analysis ◽  
Field Emission ◽  
Wear Mechanisms ◽  
Abrasive Particles ◽  
X Ray ◽  
Analysis Techniques ◽  
Analytical Tem ◽  
Surface Analysis Techniques ◽  
Cu Cmp

In this work, we used surface analysis techniques, such as a field-emission highresolution analytical TEM, X-ray spectroscopy, and XPS to analyze abrasive particles after polishing. Results showed evidence of copper oxide (Cu2O) in the polished slurry. However, there was no metallic crystalline copper detected. After comparing these data with the results obtained from our electro-chemical experiments, we propose two possible chemical wear mechanisms in Cu CMP.

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