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ISO 19207-2016 pdf free
HomeISO StandardsISO 19207-2016 pdf free
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ISO 19207-2016 pdf free. Thermal spraying . Classification method of adhesive strength by indentation.
ISO 19207 specifies the classification method of adhesive strength for thermal spray coatings at room temperature by using Vickers hardness testing machine. This International Standard classifies the adhesive strength, called adhesion index, evaluated from the maximum indentation force without visible cracking, and it is applicable for relative dense metal coatings, ceramic coatings and cermet coatings. This International Standard can be used within comparison within each coating system.
The indentation method is not recommended for very thin and very porous coatings and also for the coating system with lower cohesion strength than adhesion strength. It is recommended that this test method can be applied for a coating of which porosity is less than approximately 15 %.
2 Normative references
The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
ISO 6507-1, Metallic materials — Vickers hardness test — Part 1: Test method
ISO 6507-2, Metallic materials — Vickers hardness test — Part 2: Verification and calibration of testing machines
ISO 14917, Thermal spraying — Terminology, classification
ISO 14923, Thermal spraying — Characterization and testing of thermally sprayed coatings
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 14917, ISO 14923 and the following apply.
3.1 critical indentation force maximum indentation force without visible cracking between substrate and coating
3.2 adhesion Index index of adhesive strength of coatings defined by the critical indentation force
4 Symbols and units
For the purposes of this document, the following symbols and units apply (see Figures 1 and 2).
5 Principle
When a pyramidal Vickers diamond indenter is indented with the indentation force at the interface (see Figure 3), an interfacial crack opening force that acts perpendicularly to the interface is generated.This crack opening force is proportional to the test force. When the crack opening force exceeds, the adhesive strength of the test piece, an interfacial crack is generated. Accordingly, it is possible to classify the adhesive strength of the test piece by the indentation force applied using the Vickers indenter.ISO 19207 pdf download.


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