ASTM-C1624:2010 Edition

$58.50

C1624-05(2010) Standard Test Method for Adhesion Strength and Mechanical Failure Modes of Ceramic Coatings by Quantitative Single Point Scratch Testing

Published By	Publication Date	Number of Pages
ASTM	2010	28

Guaranteed Safe Checkout

Categories: 25.220.99 - Other treatments and coatings, ASTM

If you have any questions, feel free to reach out to our online customer service team by clicking on the bottom right corner. We’re here to assist you 24/7.
Email:[email protected]

Description

ASTM C1624-05-Reapproved2010

Historical Standard: Standard Test Method for Adhesion Strength and Mechanical Failure Modes of Ceramic Coatings by Quantitative Single Point Scratch Testing

ASTM C1624

Scope

1.1 This test method covers the determination of the practical adhesion strength and mechanical failure modes of hard (Vickers Hardness HV = 5 GPa or higher), thin (≤30 μm) ceramic coatings on metal and ceramic substrates at ambient temperatures. These ceramic coatings are commonly used for wear/abrasion resistance, oxidation protection, and functional (optical, magnetic, electronic, biological) performance improvement.

1.2 In the test method, a diamond stylus of defined geometry (Rockwell C, a conical diamond indenter with an included angle of 120° and a spherical tip radius of 200 μm) is drawn across the flat surface of a coated test specimen at a constant speed and a defined normal force (constant or progressively increasing) for a defined distance. 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 force level(s) which produce a specific type/level of damage in the coating are defined as a critical scratch load(s). The test method also describes the use of tangential force and acoustic emission signals as secondary test data to identify different coating damage levels.

1.3 Applicability to Coatings—This test method is applicable to a wide range of hard ceramic coating compositions: carbides, nitrides, oxides, diamond, and diamond-like carbon on ceramic and metal substrates. The test method, as defined with the 200 μm radius diamond stylus, is commonly used for coating thicknesses in the range of 0.1 to 30 μm. Test specimens generally have a planar surface for testing, but cylinder geometries can also be tested with an appropriate fixture.

1.4 Principal Limitations:

1.4.1 The test method does not measure the fundamental adhesion strength of the bond between the coating and the substrate. Rather, the test method gives an engineering measurement of the practical (extrinsic) adhesion strength of a coating-substrate system, which depends on the complex interaction of the test parameters (stylus properties and geometry, loading rate, displacement rate, and so forth) and the coating/substrate properties (hardness, fracture strength, modulus of elasticity, damage mechanisms, microstructure, flaw population, surface roughness, and so forth).

1.4.2 The defined test method is not directly applicable to metal or polymeric coatings which fail in a ductile, plastic manner, because plastic deformation mechanisms are very different than the brittle damage modes and features observed in hard ceramic coatings. 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.

1.4.3 The test method, as defined with the Rockwell C diamond stylus and specific normal force and rate parameters, is not recommended for very thin (<0.1 μm) or thicker coatings (>30 μm). Such coatings may require different stylus geometries, loading rates, and ranges of applied normal force for usable, accurate, repeatable results.

1.4.4 The values stated in SI units are to be regarded as standard. 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 .

1.4.5 This standard does not purport to address all of the safety concerns, if any, associated with its use. 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.

Keywords

adhesion test; ceramic coating; critical scratch load; hard coatings; scratch adhesion; scratch test; Ceramic coatings; Adhesion–coatings; Scratch adhesion; Scratch testing

ICS Code

ICS Number Code 25.220.99 (Other treatments and coatings)

DOI: 10.1520/C1624-05R10

PDF Catalog

PDF Pages	PDF Title
1	Scope
2	Referenced Documents Terminology
3	Summary of Test Method FIG. 1 FIG. 2
4	Significance and Use Test Methodology and Experimental Control
5	FIG. 3 FIG. 4
6	TABLE 1 FIG. 5
7	Interferences Apparatus TABLE 2
8	FIG. 6
10	Test Specimens
12	Calibration Test Procedure TABLE 3
13	FIG. 7
15	FIG. 8
16	Calculations
17	Report
18	Precision and Bias Keywords A1. ROCKWELL DIAMOND INDENTER SPECIFICATIONS A1.1 Diamond Indenter A2. ALIGNMENT AND CALIBRATION A2.1 Introduction
19	A2.2 Specimen-Stage Alignment and Leveling A2.3 Horizontal Displacement Sensors and Stage Calibration A2.4 Force Sensor Calibration (Normal and Tangential) FIG. A2.1
20	A2.5 Optical System Calibration A2.6 Acoustic Emission Calibration A2.7 Scratch Adhesion Reference Specimens—Internal and Certified
21	A3. REPEATABILITY AND REPRODUCIBILITY STUDIES A3.1 A3.2 A3.3 A3.4 TABLE A3.1 TABLE A3.2
22	X1. COATING DAMAGE CRITERIA AND SCRATCH ATLAS X1.1 Coating Damage Definitions and Criteria TABLE A3.3 FIG. X1.1 TABLE X1.1
23	X1.2 Scratch Atlas TABLE X1.2 TABLE X1.3
24	TABLE X1.4
25	TABLE X1.4
26	X2. EXPERIMENTAL VARIABLES IN SCRATCH ADHESION TESTING X2.1 X2.2 X2.3 X2.4 X2.5 X2.6 X2.7 X2.8 X2.9 X2.10 Critical Experimental Test Variables
27	TABLE X2.1

Additional information

Standard Title	C1624-05(2010) Standard Test Method for Adhesion Strength and Mechanical Failure Modes of Ceramic Coatings by Quantitative Single Point Scratch Testing
Published Code	ASTM
Publication Date	2010
Pages Count	28
ICS Codes	25.220.99 - Other treatments and coatings