scholarly journals Blister Test as Method of Measuring Adhesion of Solids on a Flat Surface

2019 ◽  
pp. 108-112
Author(s):  
Knut B Liland ◽  
Hallvard Faremo ◽  
Knut-Magne Furuheim
Keyword(s):  
Metal Surface ◽  
Flat Surface ◽  
Coating Layer ◽  
Adhesion Energy ◽  
Surface Coatings ◽  
Large Scatter ◽  
Nitrogen Gas ◽  
Blister Test

The adhesion between coating and a flat metal surface hasbeen investigated by measurements. The setup is based on theformation of a blister by injecting nitrogen gas under pressurebetween the coating and the substrate. The adhesion energy isdetermined by recording the pressure as a function of therecorded blister radius development. A laser is moved over theblister in 2D with two programmable step engines to measurethe blister profile and thereby the radius of the blister betweensuccessive pressure increases. The design and operation of theinstrument are described and an evaluation of its performanceand limitations is given. The method could be useful for accuratemeasurement of adhesion of many types of surface coatings tometal and, possibly, to other substrates, as well as for studies ofthe various factors that influence adhesion. A better accuracy ofthe laser for measuring the blister profile would improve thesetup.We treated aluminium surfaces in different manners (sandpaper, polishing and blowing using glass particles) but found nosignificant impact on the adhesion energy between the x-linkedcoating layer and the metal. The adhesion energy measurementshowever have a large scatter. The coating layer that was not xlinkedhad a much lower adhesion energy.

Charactervation of Adhesion in Thin-Film Materials by the Blister Test

1992 ◽  
Vol 276 ◽  
Author(s):  
Y Z. Chu ◽  
H. S. Jeong ◽  
R. C. White ◽  
C. J. Durning
Keyword(s):  
Fluid Pressure ◽  
Structural Features ◽  
Adhesion Energy ◽  
Pressure Data ◽  
Blister Test ◽  
Constant Rate ◽  
Polymer Metal ◽  
Metal Interfaces ◽  
Peel Tests ◽  
Microscopic Dynamic

ABSTRACTIn this work a blister test is applied to study the adhesion of thin films to substrates. In the blister test one injects a fluid at constant rate at the interface between the substrate and an overlayer to create a “blister”. The fluid pressure is measured as function of time. An analysis gives a reliable way of calculating the adhesion energy Ga. from the time-dependent pressure data. The method was applied to a variety of systems including polymer/polymer, polymer/silicon and polymer/metal interfaces. The results show that the test is very sensitive and is able to determine small adhesion energies inaccessible in conventional peel tests. This work demonstrates that the blister test provides a means of relating the mechanical strength of an interface to its microscopic dynamic and structural features.

Properties of Nano-Hybrid Sol-Gel Materials Synthesized from Colloidal Silica-Silane Containing Epoxy Silane

2007 ◽  
Vol 336-338 ◽  
pp. 2278-2281 ◽  
Author(s):  
Moon Kyong Na ◽  
Dong Pil Kang ◽  
Hoy Yul Park ◽  
Myeong Sang Ahn ◽  
In Hye Myung
Keyword(s):  
Contact Angle ◽  
Colloidal Silica ◽  
Flat Surface ◽  
Coating Layer ◽  
Sol Gel ◽  
Chemical Properties ◽  
Coating Films ◽  
Initial Stage ◽  
Physical And Chemical ◽  
And Chemical Properties

Three kinds of colloidal silica (CS)/silane sol solutions were synthesized in variation with parameters such as different acidity and reaction time. Sol solutions were prepared from HSA CS/ methyltrimethoxysilane (MTMS), LS CS/MTMS and LS CS/MTMS/γ -Glycidoxypropyltri methoxysilane (ES) solutions. In order to understand their physical and chemical properties, sol-gel coating films were fabricated on glass. Coating films on glass, obtained from LS/MTMS sol, had high contact angle, also, much enhanced flat surface in the case of LS/MTMS sol was observed in comparison with HSA/ MTMS sol. From all sol-gel solutions, seasoning effect of for enhancing properties of sol-gel coating layer on glass was observed while such sol-gel solutions were left for 7days. In initial stage of sol-gel reaction, all most of sol solutions used in this work seem to be unstable, formation of coating films was a little hazy and rough. However, improved coating films as observed in 4days later. LS/MTMS/ES sol solutions were synthesized with ES, adding to LS/MTMS sol. Contact angle of LS/MTMS/ES sol-gel coating films decreased, since ES played a role in forming hydrophilic hydroxyl sol. The elastic portion of coating films prepared from LS/MTMS/ES sol increased with addition of ES, but thermal stability decreased a little.

scholarly journals Does the aquatic invertebrate nipple array prevent bubble adhesion? An experiment using nanopillar sheets

2013 ◽  
Vol 9 (5) ◽  
pp. 20130552 ◽  
Author(s):  
Euichi Hirose ◽  
Hiroyuki Mayama ◽  
Akihiro Miyauchi
Keyword(s):  
Body Surface ◽  
Aquatic Invertebrates ◽  
Flat Surface ◽  
Aquatic Organisms ◽  
Hydrophobic Surface ◽  
Adhesion Energy ◽  
The Body ◽  
Surface Versus ◽  
Hydrophilic Surfaces ◽  
Flow Occlusion

The nipple array is a submicrometre-scale structure found on the cuticle surfaces of various invertebrate taxa. Corneal nipples are an antiglare surface in nocturnal insects, but the functional significance of the nipple array has not been experimentally investigated for aquatic organisms. Using nanopillar sheets as a mimetic model of the nipple array, we demonstrated that significantly fewer bubbles adhered to the nanopillar surface versus a flat surface when the sheets were hydrophilic. Many more bubbles adhered to the hydrophobic surface than the hydrophilic surfaces. Bubbles on the body surface may cause buoyancy problems, movement interference and water flow occlusion. Here, bubble repellence is proposed as a function of the hydrophilic nipple array in aquatic invertebrates and its properties are considered based on bubble adhesion energy.

Pre-shadowed Surface Replicas of Frozen Biological Specimens

1970 ◽  
Vol 28 ◽  
pp. 288-289
Author(s):  
Russell L. Steere ◽  
J. Y. Haga
Keyword(s):  
Thin Film ◽  
High Purity ◽  
Flat Surface ◽  
Metal Plate ◽  
Central Hole ◽  
Nitrogen Gas ◽  
Rapid Preparation ◽  
Copper Specimen ◽  
Ultra High Purity ◽  
Solid Copper

A solid copper specimen cap without central hole serves as a flat surface for easy and rapid preparation of surface replicas of frozen biological specimens (1) in a Denton DFE-2 freezeetch apparatus (2). A thin film of 40% glycerol is spread over the flat upper surface of the cap, and small pieces of leaf, petal, or other tissue are placed on this moistened surface. Suspensions of cells or particulates may be spread thinly on a glass or metal plate which is then placed on the glycerol-coated cap. The freeze-etch module is flushed with ultra high-purity dry nitrogen gas, then the cap with specimens in place is clamped to the stage and the double shroud mechanism (3) moved inward to put the specimen in the inner chamber.

Inverted blister test to measure adhesion energy of thermal oxide scales on metals or alloys

2002 ◽  
Vol 18 (10) ◽  
pp. 1217-1220 ◽  
Author(s):  
J. Mougin ◽  
M. Dupeux ◽  
A. Galerie ◽  
L. Antoni
Keyword(s):  
Adhesion Energy ◽  
Oxide Scales ◽  
Blister Test ◽  
Thermal Oxide

Increasing in Reliability of Power Transmissions Bearings by Surface Modification and Coating

2007 ◽  
Author(s):  
Efim Tesker ◽  
Sergey Tesker ◽  
Victor Sirotin ◽  
Michael Salolykin ◽  
Nicolay Yakovlev
Keyword(s):  
Surface Modification ◽  
Laser Radiation ◽  
Bearing Capacity ◽  
Laser Treatment ◽  
Metal Surface ◽  
Applied Research ◽  
Laser Surface ◽  
Surface Coatings ◽  
Laser Surface Modification ◽  
Operating Properties

The data of applied research aimed at new laser surface modification technologies development are presented in this paper. Both polymer and metal surface coatings formed on steel parts under laser radiation have been tested and their influence on the friction conditions, reliability, bearing capacity and durability of the drive item have been investigated. The relationships between laser treatment modes, coatings composition and various exploitation parameters have been obtained. It is shown that the worked out technologies, to be used in production, provide power transmissions bearings with increased reliability and operating properties.

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