Biomimetic nanostructured coatings on nano-grained/ultrafine-grained substrate: Microstructure, surface adhesion strength, and biosolubility

2009 ◽  
Vol 29 (8) ◽  
pp. 2417-2427 ◽  
Author(s):  
S. Mali ◽  
R.D.K. Misra ◽  
M.C. Somani ◽  
L.P. Karjalainen
Keyword(s):  
Adhesion Strength ◽  
Nanostructured Coatings ◽  
Surface Adhesion ◽  
Ultrafine Grained ◽  
Substrate Microstructure

Surface Adhesion Strength of Varnishes in Some Impregnated Woods

2009 ◽  
Vol 9 (22) ◽  
pp. 4066-4070 ◽  
Author(s):  
M. Atar ◽  
M.H. Colakoglu
Keyword(s):  
Adhesion Strength ◽  
Surface Adhesion

Ultrasound Examination – Mean of Analysis of the Layers Properties Deposited Through Different Thermal Spraying Methods

2012 ◽  
Vol 186 ◽  
pp. 169-175 ◽  
Author(s):  
Dand Botez Sorin Constantin ◽  
Gabriel Marius Dumitru ◽  
Bogdan Dumitru ◽  
Dina Viorel-Cristian
Keyword(s):  
Comparative Study ◽  
Adhesion Strength ◽  
Ultrasound Examination ◽  
Thermal Spraying ◽  
Atmospheric Plasma Spraying ◽  
Atmospheric Plasma ◽  
Flame Spraying ◽  
Arc Spraying ◽  
Surface Adhesion ◽  
Better Than

Reconditioning materials by thermal spray metalizing is a rapidly growing field. In this paper we conducted a comparative study of three methods of metal deposition: flame spraying, atmospheric plasma spraying, arc spraying. This was done considering two of the properties of layers obtained in metalizing process: surface adhesion strength and porosity. The result of ultrasound examination by immersion shows that adhesion obtained through APS method is better than the others two obtained through AS and FS methods.

scholarly journals Study of Aluminum Influence on the Adhesion of Stainless Steel in Flame Spraying

2020 ◽  
Vol 245 ◽  
pp. 591-598
Author(s):  
Sergey Stepanov ◽  
Tatyana Larionova ◽  
Sergey Stepanov
Keyword(s):  
Surface Roughness ◽  
Adhesion Strength ◽  
Roughness Parameter ◽  
Flame Spraying ◽  
Chemical Components ◽  
Chemical Compositions ◽  
Flame Spray ◽  
Surface Adhesion ◽  
Comparative Results ◽  
Steel Substrates

This paper is dedicated to a study of aluminum influence on the improvement of surface adhesion strength. The main purpose of this work is to investigate the strength of adhesion to the substrate by mixing flame spray powder with aluminum, which not only possesses high corrosion resistance and conductivity, but also provides additional strength, as it combines and reacts with other components of the powder. Research results of sandblasting dependence on surface roughness parameter Ra are demonstrated. The paper describes authors’ original device for a measuring instrument “Profilometer”, which was also used for measuring roughness parameter in order to obtain comparative results. Authors present results of adhesion measurements given obtained values of surface roughness by mixing nominal chemical composition of PR-30X13 powder, used as a testing material, with aluminum, which reacts with oxides on the surface of steel substrates, imparts strength to the bonding between the coating and the substrate, protects the base metal due to a combination of chemical components of the powder and creates a layer of dense surface coating. These dependencies are analyzed and parameters, exerting the greatest influence on their values, are identified. Taking into account the results obtained through numerical modeling, authors propose a mathematical model of a dependency between adhesion strength and certain values of surface roughness for different chemical compositions of flame spray powder. These studies will help in the development of certain material types for spraying and hardening of steel parts and products in order to improve their durability.

Mechanism of Mechanical Energy Aided Aluminizing

2013 ◽  
Vol 669 ◽  
pp. 267-272 ◽  
Author(s):  
Xiu Chun Wang ◽  
Jun Wei ◽  
Jing Zhang ◽  
Jie Ma ◽  
Shuo Liu ◽  
...  
Keyword(s):  
Particle Size ◽  
Adhesion Strength ◽  
Process Parameters ◽  
Mechanical Energy ◽  
Filler Particle ◽  
Chemical Activity ◽  
Specimen Surface ◽  
Surface Adhesion ◽  
Filler Particle Size ◽  
Adhesion Probability

In this paper, the effects of aluminizing agent composition, filler particle size, process parameters and adding impinging particle into aluminizing agent on the thickness of aluminizing layer were investigated. The mechanism of the significant reduction in aluminizing temperature using aluminizing agent was analyzed. The results indicate that the aluminizing temperature can be reduced to 500°C through mechanical energy aided aluminizing. The mechanical energy aids to improve the surface adhesion probability of Al powders on the specimen surface, increases the chemical activity and adhesion strength of Al powders, thus the aluminizing temperature is greatly reduced.

Progress on Measurement of Adhesion Strength of Marine Microfouling Organisms

2011 ◽  
Vol 299-300 ◽  
pp. 883-886 ◽  
Author(s):  
Juan Zhou ◽  
Cun Guo Lin ◽  
Dong Xia Duan
Keyword(s):  
Adhesion Strength ◽  
Flow Cell ◽  
Flow Chamber ◽  
Test Methods ◽  
Test Method ◽  
Material Surface ◽  
Surface Adhesion ◽  
Biological Adhesion ◽  
Laminar Channel Flow ◽  
Antifouling Ability

The development of novel nontoxic antifouling paint has led to the need for better test methods to evaluate their performance. The adhesion strength of microorganism on material surface is the key parameter to characterize whether they could permanently soiled, therefore it is significant to establish a biological adhesion test method to evaluate the material antifouling ability. In this paper, several types of surface adhesion strength test devices have been introduced, including spinet apparatus, laminar channel flow cell, radial flow chamber, annular flow cell and fully-developed turbulent channel. Their application, advantage and disadvantage have also been discussed.

Milling process optimization for the best surface coat adhesion of the rigid polyurethane foam

2018 ◽  
Vol 38 (10) ◽  
pp. 995-1005
Author(s):  
Rok Hafner ◽  
Damir Grguraš ◽  
Davorin Kramar
Keyword(s):  
Surface Quality ◽  
Adhesion Strength ◽  
Surface Texture ◽  
Milling Process ◽  
Sufficient Information ◽  
Surface Coat ◽  
Height Distribution ◽  
Surface Adhesion ◽  
Milling Parameters ◽  
Process Effects

Abstract In this research, the influences of milling parameters on the surface quality and coat adhesion of rigid polyurethane (PU) foam are highlighted. Several surface texture parameters were correlated with the milling parameters. The correlation between the coat adhesion strength, as determined by the pull-off test, and the milling parameters was also established. The investigation revealed that traditional height distribution roughness parameters, such as Ra, Sa, Rz, and Sz, do not offer sufficient information for a proper surface adhesion evaluation. Shaping and bearing surface parameters, on the contrary, provide more information for the surface quality assessment, although the structure of the PU was found to be inhomogeneous. The evaluation of milling process effects on surface texture and coat adhesion and the determination of optimal machining conditions were derived based on response surface methodology. The goal was an adequate surface texture that provides the best coat adhesion strength.

Characterization of Time and Temperature Dependent Mechanical Behavior of Underfill Materials in Electronic Packaging Application

2003 ◽  
Author(s):  
Chia-Tai Kuo ◽  
Ming-Chuen Yip ◽  
Kuo-Ning Chiang
Keyword(s):  
Strain Rate ◽  
Adhesion Strength ◽  
Deformation Rate ◽  
Specimen Preparation ◽  
Surface Adhesion ◽  
Mechanical Behaviors ◽  
Strain Behavior ◽  
Thermal Environments ◽  
Test Methodology ◽  
Solder Mask

The thermo-mechanical testing of HYSOL FP4549 polymer-filled underfill material was conducted under different strain rate and temperature environment. A new specimen preparation procedure and further test methodology are developed to characterize the underfill time-temperature mechanical behaviors. The stress-strain behavior of materials is simulated with constitutive framework, and the dependence of Young’s modulus on temperature and strain rate was evaluated. In addition, the specimens were tested with micro-tensile system to evaluate the underfill materials creep curve as a function of temperature and stress level. In view of the uncertainty of the Young’s modules determination, the specimens were tested with unloading-reloading technique to verify the test results and investigate its cyclic mechanical behaviors. On the other hand, the adhesion strength are tested between different adhesion surface by different deformation rate after some isothermal and hygro-thermal environments attack, which is to simulate the environment that the electronic components may be encountered. The results reveal that the rise of the temperature and moisture cause the apparent reduction of the surface adhesion strength, due to the material microstructure transition and the diffusion and concentration of moisture. For all conditions of the experiment after environmental preconditioning, the specimen fracture surfaces occur between solder mask and FR4 substrates, which means the measured strength is the adhesion strength between solder mask and FR4. Comparing different adhesion surface, the adhesion strength of underfill/FR4 is higher than solder mask/FR4. In addition, it has found that the fracture strain and the slope of the load-deformation diagram increases with the decreasing deformation rate. The interface of solder mask/FR4 is more sensitive to the temperature and moisture.

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