EN 1071-3:2005

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Advanced technical ceramics - Methods of test for ceramic coatings - Part 3: Determination of adhesion and other mechanical failure modes by a scratch testHochleistungskeramik - Verfahren zur Prüfung keramischer Schichten - Teil 3: Bestimmung der Haftung und Formen des mechanischen Versagens mit dem RitztestCéramiques techniques avancées - Méthodes d'essai pour revetements céramiques - Partie 3 : Détermination de l'adhérence et autres modes de rupture mécanique par essai de rayureAdvanced technical ceramics - Methods of test for ceramic coatings - Part 3: Determination of adhesion and other mechanical failure modes by a scratch test81.060.30Sodobna keramikaAdvanced ceramics25.220.99Druge obdelave in prevlekeOther treatments and coatingsICS:Ta slovenski standard je istoveten z:EN 1071-3:2005SIST EN 1071-3:2005en01-december-2005SIST EN 1071-3:2005SLOVENSKI
STANDARDSIST ENV 1071-3:20001DGRPHãþD

EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN 1071-3August 2005ICS 81.060.30Supersedes ENV 1071-3:1994
English VersionAdvanced technical ceramics - Methods of test for ceramiccoatings - Part 3: Determination of adhesion and othermechanical failure modes by a scratch testCéramiques techniques avancées - Méthodes d'essai pourrevêtements céramiques - Partie 3 : Détermination del'adhérence et autres modes de défaillance mécanique paressai de rayureHochleistungskeramik - Verfahren zur Prüfung keramischerSchichten - Teil 3: Bestimmung der Haftung und Formendes mechanischen Versagens mit dem RitztestThis European Standard was approved by CEN on 27 June 2005.CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this EuropeanStandard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such nationalstandards may be obtained on application to the Central Secretariat or to any CEN member.This European Standard exists in three official versions (English, French, German). A version in any other language made by translationunder the responsibility of a CEN member into its own language and notified to the Central Secretariat has the same status as the officialversions.CEN members are the national standards bodies of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France,Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia,Slovenia, Spain, Sweden, Switzerland and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMITÉ EUROPÉEN DE NORMALISATIONEUROPÄISCHES KOMITEE FÜR NORMUNGManagement Centre: rue de Stassart, 36
B-1050 Brussels© 2005 CENAll rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 1071-3:2005: ESIST EN 1071-3:2005

Procedure for calibration of a scratch testing system.17 A.1 Introduction.17 A.2 Scope.17 A.3 Principle.17 A.4 Apparatus.17 A.5 Calibration procedures.18 A.6 Recording results.24 Annex B (informative)
Typical failure modes obtained in scratch testing.25 B.1 Introduction.25 B.2 Experimental.25 B.3 Results.25 B.4 Conclusions.25 B.5 The scratch test atlas of failure modes.26 Bibliography.47
Determination of coating thickness by contact probe profilometer Part 2:
Determination of coating thickness by the crater grinding method Part 3:
Determination of adhesion and other mechanical failure modes by a scratch test Part 4:
Determination of chemical composition by electron probe microanalysis (EPMA) Part 5:
Determination of porosity Part 6:
Determination of the abrasion resistance of coatings by a micro-abrasion wear test Part 7:
Determination of hardness and Young's modulus by instrumented indentation testing Part 8:
Rockwell indentation test for evaluation of adhesion Part 9: Determination of fracture strain Part 10:
Determination of coating thickness by cross sectioning Part 11: Measurement of internal stress with the Stoney formula Parts 7 to 11 are Technical Specifications. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. SIST EN 1071-3:2005

Knowledge of the failure mode is essential to assess the mechanical behaviour of coated surfaces. Only some of the observed failure events in scratch testing are related to detachment at the coating-substrate interface and are thus relevant as a measure of adhesion. Other failures, such as cracks and cohesive damage within the coating or substrate may be equally important to determine the behaviour of a coated component in a particular application.
The scratch test is designed for the assessment of the mechanical integrity of coated surfaces. The test method consists of generating scratches with a stylus of defined shape (usually diamond with a Rockwell C geometry) by drawing it across the surface of the coating-substrate system to be tested, either under constant or progressive load (see Figure 1). Failure events are detected by direct microscopic observation of the scratch and sometimes by using acoustic emission and/or friction force measurement. The driving forces for the failure of the coating-substrate system in the scratch test are a combination of elastic-plastic indentation stresses, frictional stresses and the residual internal stress present in the coating. The normal load at which failure occurs is called the critical load Lc.
NOTE 1 In a scratch test, a number of consecutive coating failure events may be observed at increasing critical load values. Failure by cracking through the coating thickness (through-thickness cracking) usually occurs at lower loads than detachment of the coating. Therefore, it is quite common to characterise the onset of cracking by the critical normal load Lc1, while the onset of coating detachment defines the critical normal load Lc2. In general, a series of failure modes are observed and used to study the mechanical behaviour of the coated surface, where the onset of the nth failure mode defines the critical load Lcn (see Annex B). NOTE 2 The critical loads at which the failure events appear depend not only on the coating adhesion strength but also on other parameters, such as loading rate, traverse speed, diamond tip wear, substrate and coating roughness, some of which are directly related to the test itself, while others are related to the coating-substrate system. SIST EN 1071-3:2005

(a)
(b) Key X Time Y Normal load Z Indenter traverse distance Figure 1 — Sketches illustrating the normal load and traverse distance versus time in (a) the progressive load, and (b) the constant load operation modes
...