ASTM C1624 PDF

Rather, the test method gives a quantitative engineering measurement of the practical extrinsic adhesion strength and damage resistance of the coating-substrate system as a function of applied normal force. However, reliable and reproducible test results require careful control of the test system configuration and testing parameters, detailed analysis of the coating damage features, and appropriate characterization of the properties and morphology of the coating and the substrate of the test specimens. Measurements of the damage mechanisms in a coating as a function of applied normal forces are useful to understand material-process-property relations; quantify and qualify the mechanical response of coating-substrate systems; assess coating durability; measure production quality; and support failure analysis. Commonly, the low comparative modulus of the polymer substrate means that the ceramic coating will generally tend to fail in bending through-thickness adhesive failure before cohesive failure in the coating itself. Porous coatings can be tested, but the effects of porosity on the damage mechanisms in the coating must be carefully considered.

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Full Description 1. The damage along the scratch track is microscopically assessed as a function of the applied force. Specific levels of progressive damage are associated with increasing normal stylus forces. The test method also describes the use of tangential force and acoustic emission signals as secondary test data to identify different coating damage levels. Test specimens generally have a planar surface for testing, but cylinder geometries can also be tested with an appropriate fixture.

The test method may be applicable to hard metal coatings which fail in a brittle mode with appropriate changes in test parameters and damage analysis procedures and criteria. Such coatings may require different stylus geometries, loading rates, and ranges of applied normal force for usable, accurate, repeatable results.

No other units of measurement are included in this standard. Test data values in SI units newtons N for force and millimetres mm for displacement are to be considered as standard and are in accordance with. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.

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More C Rather, the test method gives a quantitative engineering measurement of the practical extrinsic adhesion strength and damage resistance of the coating-substrate system as a function of applied normal force. However, reliable and reproducible test results require careful control of the test system configuration and testing parameters, detailed analysis of the coating damage features, and appropriate characterization of the properties and morphology of the coating and the substrate of the test specimens. Measurements of the damage mechanisms in a coating as a function of applied normal forces are useful to understand material-process-property relations; quantify and qualify the mechanical response of coating-substrate systems; assess coating durability; measure production quality; and support failure analysis.

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ASTM C1624:05(2015)

A number in parentheses indicates the year of last reapproval. Asuperscript epsilon indicates an editorial change since the last revision or reapproval. The damage along thescratch track is microscopically assessed as a function of theapplied force. Specific levels of progressive damage areassociated with increasing normal stylus forces. The test methodalso describes the use of tangential force and acoustic emissionsignals as secondary test data to identify different coatingdamage levels.

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ASTM C1624 PDF

Fenritaxe Repeatability and Reproducibility Studies. Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard. Thinner coatings may require a astj diameter stylus and lower normal forces for reliable results. Data Acquisition and Recording.

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