Failure mechanism of sprayed coatings during determination of adhesive strength by the pin method

1984 ◽  
Vol 23 (4) ◽  
pp. 326-330 ◽  
Author(s):  
A. F. Puzryakov ◽  
A. N. Eremichev ◽  
V. A. Garanov
Keyword(s):  
Failure Mechanism ◽  
Adhesive Strength ◽  
Sprayed Coatings

The Use of TMAH to Etch Silicon and Expose Metal Bridging Failures

2000 ◽  
Author(s):  
Mark Morris ◽  
James Mohr ◽  
Esteban Ortiz ◽  
Steven Englebretson
Keyword(s):  
Failure Mechanism ◽  
Schottky Diodes ◽  
Tetramethylammonium Hydroxide ◽  
Novel Approach ◽  
Failure Location ◽  
Metal Etching ◽  
Plastic Mold

Abstract Determination of metal bridging failures on plastic encapsulated devices is difficult due to the metal etching effects that occur while removing many of the plastic mold compounds. Typically, the acids used to remove the encapsulation are corrosive to the metals that are found within the device. Thus, decapsulation can result in removal of the failure mechanism. Mechanical techniques are often not successful due to damage that results in destruction of the die and failure mechanism. This paper discusses a novel approach to these types of failures using a silicon etch and a backside evaluation. The desirable characteristics of the technique would be to remove the silicon and leave typical device metals unaffected. It would also be preferable that the device passivation and oxides not be etched so that the failure location is not disturbed. The use of Tetramethylammonium Hydroxide (TMAH), was found to fit these prerequisites. The technique was tested on clip attached Schottky diodes that exhibited resistive shorting. The use of the TMAH technique was successful at exposing thin solder bridges that extruded over the edge of the die resulting in failure.

High Temperature Corrosion of Evaporator Tubes with Thermal Sprayed Coatings

2010 ◽  
Vol 165 ◽  
pp. 110-117
Author(s):  
Jerzy Łabanowski ◽  
J. Ćwiek
Keyword(s):  
Cross Sections ◽  
Molten Salts ◽  
Single Layer ◽  
Steam Boiler ◽  
Low Emission ◽  
Distribution Of Elements ◽  
One Year ◽  
Sprayed Coatings ◽  
Thermal Sprayed Coatings

Degradation examinations of outer surface of low-emission steam boiler evaporator tubes are presented in the paper. Metallographic evaluation of scale morphology as well as determination of chemical composition of micro sites and distribution of elements on cross-sections is reported. Water-wall tubes were exposed in steam boiler for up to two years period. Common tubes produced from 16Mo3 steel suffered sulphide and molten salts corrosions. Thermal sprayed tubes with the single layer of 70%Ni 30%Cr alloy demonstrate better corrosion resistance, but become susceptible to sulphide corrosion due to presence of internal voids and cracks. Double layer Al2O3/Ni-30Cr coatings withstood corrosion attack for more than one year of operation, and then failed due to internal heterogeneity and crack generation.

Interfacial Characteristics and Determination of Cohesive and Adhesive Strength of Plasma-Coated Hydroxyapatite via Nanoindentation and Microscratch Techniques

Langmuir ◽  
2014 ◽  
Vol 30 (38) ◽  
pp. 11412-11420 ◽  
Author(s):  
Colm McManamon ◽  
Johann P. de Silva ◽  
John Power ◽  
Sonia Ramirez-Garcia ◽  
Michael A. Morris ◽  
...  
Keyword(s):  
Adhesive Strength ◽  
Interfacial Characteristics

Determination of epoxy coating wet-adhesive strength using a standardized ASTM/ISO scratch test

2010 ◽  
Vol 8 (2) ◽  
pp. 255-263 ◽  
Author(s):  
Han Jiang ◽  
Robert Browning ◽  
Peng Liu ◽  
T. A. Chang ◽  
Hung-Jue Sue
Keyword(s):  
Adhesive Strength ◽  
Scratch Test ◽  
Epoxy Coating

A proposed implant type torsion test for estimating adhesive strength of sprayed coatings

1992 ◽  
Vol 6 (11) ◽  
pp. 860-865
Author(s):  
T Terasaki ◽  
T Akiyama ◽  
T Kaneko ◽  
H Hisada
Keyword(s):  
Adhesive Strength ◽  
Torsion Test ◽  
Sprayed Coatings

scholarly journals ASSESSMENT OF BILIOSTATIC PROPERTIES OF MODERN TOPIC HEMOSTATIC MEANS USED IN HEPATIC SURGERY

2018 ◽  
Vol 35 (1) ◽  
pp. 102-107
Author(s):  
A V Timoshenkova ◽  
M V Kuzmin ◽  
E S Katanov
Keyword(s):  
Adhesive Strength ◽  
Testing Machine ◽  
Medical Purpose ◽  
Hepatic Surgery ◽  
Adhesive Properties ◽  
Resected Liver ◽  
Tension Testing ◽  
Polyurethane Composition ◽  
High Adhesive Strength

Aim. To assess the biliostatic properties of modern topic hemostatic means and the developed glue composition for medical purpose, used in hepatic surgery in experiment. Materials and methods. The studies, aimed at assessment of the properties of local hemostatic means, were carried out on Wistar rats weighing 178 ± 10 g. The device for determination of leak proofness of hepatic stump with hydropression technique was used. Comparative estimation of elasticity and adhesive strength of hemostatic means, using tension testing machine “REM-10”, was fulfilled. Original polyurethane glue for medical purposes was developed and studied. Results. The glue compositions “Bioglue”, hemostatic sponge “Tachocomb” and original polyurethane composition for medical purposes with adhesive strength > 600 Pa (mm H2O) ( p < 0.05) possess the best adhesive properties. It was established on the basis of experimental data that the glue composition “Bioglue” and polyurethane glue composition have a high adhesive strength, elasticity and resistance to hydropression. Conclusions. 1. Glue compositions possess higher adhesion and endure higher level of pressure as compared with sponges and plates. Original polyurethane composition has maximum adhesive strength, elasticity and hydropression resistance. 2. After application of original polyurethane glue composition on resected liver (in experiment), it is completely lysed in 30-35 days.

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