Determination of the adhesion of gasothermic coatings

Rogozhin, V. M.; Smirnov, Yu. V.; Petrov, V. Ya.

doi:10.1007/bf00802583

Cited by 3 publications

(3 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Among ways allowing to receive the qualitative assessment of the strengths of the adhesion to its basement, there are two groups: a) the shift method; and b) the normal isolation. It is mentioned in [1][2][3][4][5] works that results achieved in tests using the shift method will somewhat differ from true values.…”

Section: Methodsmentioning

confidence: 99%

“…When using cylindrical pins, the clearance between the pin and the matrix is at stake, as when the coating is laid on, its fractions being put into the clearance, result in welding of the pin with matrix, thus garbling the true value of the adhesive strength. In order to lower the effect of the friction between the pin and the matrix and, in the same time, to minimize the clearance between said details, the cylindrical pins have been changed to conical (Picture.1) [5,6,7,9] .…”

Section: Methodsmentioning

confidence: 99%

“…In the article[4], the strained state of the coating is analysed and it is shown that the only part which is in fact strained, is one surrounding the end of the pine.The ratio obtained by authors of [4] R / h ≤ 2,0 (R is the radius of the pin; h -is the thickness of the coating), for clearly adhesive isolation of the pin, forces us to limit the diameter of the pin by values 0,5 -1,0 mm. The high-quality manufacturing of such small pins whilst having wide spectrum of coatings controlled, is very difficult.In the article[5], there is a ratio for the diameter of the pin's end is given:…”

mentioning

confidence: 99%

See 2 more Smart Citations

The Qualitative Assessment of Gas-Thermal Coating’s Cohesive Strength Estimation Methods

Kretinin

Соколова

Voinash

2020

SSP

View full text Add to dashboard Cite

In this article the various methods of assessment of gas-thermal coating’s adhesion strength are considered. The methodology of carrying out the strength tests, using traditional methods of quantitative assessment of adhesive strength of a coating towards its basement, is reflected; the advantages and disadvantages of the represented methods are given. In the article, the theoretical justification of the mechanics of adhesive avulsion is given, and the imperfection of conic pins’ usage is shown. Aiming at increasing of the accuracy and quality of the strength tests of gas-thermal coatings, a modernised methodology, as well as the samples (а.с.1436025), related to detection of the adhesion strength, are suggested. The theoretical computation of the reasonableness of usage of ring cross section of the coating, resulted in the event of usage of the offered sample, is given. On the basis of theoretical computation, a defining formula of the adhesive strength is conducted. Comparison tests of adhesion strength with various sample’s designs are completed. The reasonableness and effectiveness of usage of the offered methodology in assessment of gas-thermal coating’s adhesion strength are proven.

show abstract

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

mentioning

confidence: 99%

See 1 more Smart Citation

The Qualitative Assessment of Gas-Thermal Coating’s Cohesive Strength Estimation Methods

Kretinin

Соколова

Voinash

2020

SSP

View full text Add to dashboard Cite

show abstract

Detonation-Sprayed Coatings of (Ti, Cr)B2–NiAlCr Composite Materials II. Mechanical and Tribotechnical Properties

Konoval

Leitāns

Boiko

et al. 2020

Powder Metall Met Ceram

View full text Add to dashboard Cite

Comparative Analysis of Methods for Assessing Adhesion Strength of Thermal Spray Coatings

2021

View full text Add to dashboard Cite

The paper presents the comparative analysis of existing methods for accessing the adhesive strength of thermally sprayed coatings on witness samples and products in research and industrial laboratories. The adhesive method of normal separation for cylindrical witness samples with a diameter of 25 mm, a height of 16...45 mm and a coating thickness of at least 0.2 mm is pointed out among the quantitative approaches described in both international and domestic standards. An alternative pin test having no restrictions on the ultimate strength of adhesion was used to evaluate conical witness samples with an end section diameter of 1.5...2.0 mm and a coating thickness of 0.3...0.5 mm. The shear method presents two possible adhesion measurement tests: with cylindrical witness samples having the diameter of 25 mm, the width of the annular coating section of 4 ... 30 mm and the thickness of the working layer not exceeding 0.1 mm and prismatic ones with linear dimensions of shear section of 2.5...5.0 mm and the coating thickness of at least 0.25 mm. During the tests all methods were characterized by irregular loading of the flat section of the coating. Mathematical models for calculating the actual value of the tensile and shear adhesion strength are presented, taking into account the appearance of additional bending and shear forces when loading the coating.

show abstract

Determination of the adhesion of gasothermic coatings

Cited by 3 publications

References 0 publications

The Qualitative Assessment of Gas-Thermal Coating’s Cohesive Strength Estimation Methods

The Qualitative Assessment of Gas-Thermal Coating’s Cohesive Strength Estimation Methods

Detonation-Sprayed Coatings of (Ti, Cr)B2–NiAlCr Composite Materials II. Mechanical and Tribotechnical Properties

Comparative Analysis of Methods for Assessing Adhesion Strength of Thermal Spray Coatings

Contact Info

Product

Resources

About