Analysis of crack resistance and quality of thin coatings by Acoustic Emission

Nikulin, S.; Khanzhin, Vladislav G.; Рожнов, А. Б.; Babukin, A. V.; Белов, В. А.

doi:10.1504/ijmmp.2006.011651

Cited by 3 publications

(2 citation statements)

References 4 publications

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“…Considering that a main type of destruction of protective-decorative coatings is cracking fissuring, it is of practical interest to estimate parameters of crack formation of coatings during an aging. At present, there are several methods for assessing the crack resistance of coatings [19][20][21][22]. The determination of critical coefficient of intensity of tensions К 1с was carried out by Coatings and Thin-Film Technologies us according to the technique [23] based on a ratio between the crack length, a print of the Vickers indenter, and viscosity of destruction.…”

Section: Stress State Of Coatings Under Exposure Operational Factorsmentioning

confidence: 99%

Crack Resistance of Paint Coatings, Cement Concretes

Логанина¹

2019

Coatings and Thin-Film Technologies

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Information on the method for assessing the crack resistance of paint and varnish coatings is given. A method is proposed, based on the ratio between the length of the crack, the Vickers indenter imprint, and the fracture toughness. Numerical values and stress intensity factor in coatings are given, depending on the type and duration of aging, porosity of the cement substrate, and the quality of the appearance of the coatings. It is established that with an increase in the roughness of the coating surface, the value of the stress intensity coefficient is increased. The increase in the moisture content of the substrate at the time of application of the paint composition leads to the appearance of a more defective structure of the contact layer "coating-substrate" and a greater propensity to cracking. It is revealed that there is a value of the optimum substrate moisture, for each particular coating in terms of its fracture toughness. It is shown that during the aging of protective and decorative coatings of the exterior walls of buildings, a mechanism of their destruction from elastic ductile to brittle changes occurs.

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Section: Stress State Of Coatings Under Exposure Operational Factorsmentioning

confidence: 99%

Crack Resistance of Paint Coatings, Cement Concretes

Логанина¹

2019

Coatings and Thin-Film Technologies

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“…By the quality of appearance means the presence of defects (inclusions, streaks, shagreen, strokes and scratches, waviness, variability) paintwork. The presence of defects on the surface of the paintwork depends on the quality class of the appearance [1][2][3].…”

Section: Introductionmentioning

confidence: 99%

Development of model of the quality of the appearance of paint and varnish coatings

Логанина¹

2019

MATEC Web Conf.

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The regularities of the formation of the quality of the appearance of coatings from the rheological and technological properties of colorful compositions are established. It was revealed that with an increase in the surface tension of paint , a lower quality of the appearance of the resulting coating is observed. With an increase in the porosity of the substrate, an increase in the surface roughness of the coatings is observed. A model of the appearance quality of coatings is proposed depending on the porosity of the substrate and the surface tension of the paint composition

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