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Metod för mätning av restspänningar i PVD-beläggningar på tunna substrat
Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences.
Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences.
Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences.
Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences.
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2016 (Swedish)Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesisAlternative title
Method of measuring residual stress in PVD coatings on thin substrates (English)
Abstract [en]

The aim of this project was to, based on a given idea, develop and evaluate a method for measuring residual stress in thin PVD coatings.

AlCrN was deposited, by PVD, on thin circular samples of stainless steel foil and the radius of the emerged curvature was measured using an optical profilometer. From the radius data the residual stress in the coating of each sample was calculated. The foil samples examined were of two different thicknesses, 0.3 mm and 0.5 mm. With the parameters of the project the foils of 0.3 mm were found most suitable.

Furthermore, the method was compared to an already established method where depositions are made on thicker substrates, which are then ground to an appropriate thickness. A correlation factor between the two methods was calculated and found to be 0.91 ± 0.28.

Finally, the possibility of adapting the method in running production was investigated. Cost and time analyses were conducted and both supported the applicability of the method.

Abstract [sv]

Projektets syfte var att utveckla och utvärdera en metod för att mäta restspänningar i tunna PVD-beläggningar utifrån en redan befintlig idé.

Tunna cirkulära prover av rostfritt stål belades med AlCrN genom PVD och radien på den utböjning som uppstod mättes med en optisk profilometer. Restspänningen bestämdes sedan utifrån den uppmätta radien. Folier av två olika tjocklekar, 0,3 mm och 0,5 mm, utvärderades. Med de processparametrar som användes i projektet visades att folien med tjocklek 0,3 mm var den bäst lämpade.

Metoden jämfördes även med en etablerad metod där tjocka substrat beläggs och sedan slipas ned till lämplig tjocklek. En korrelationsfaktor som relaterar de två metoderna bestämdes till 0,91 ± 0,28.

Slutligen undersöktes möjligheterna att använda metoden i löpande produktion. Kostnads- och tidsanalyser utfördes och resultaten stödjer metodens användbarhet.

Place, publisher, year, edition, pages
2016. , 28 p.
Series
TVE, 16008
Keyword [en]
Residual stress measurement, PVD coatings, thin substrates, foil
Keyword [sv]
Mätning av restspänningar, PVD skikt, tunna substrat, folie
National Category
Other Materials Engineering
Identifiers
URN: urn:nbn:se:uu:diva-295939OAI: oai:DiVA.org:uu-295939DiVA: diva2:941687
External cooperation
Primateria AB
Examiners
Available from: 2016-06-28 Created: 2016-06-10 Last updated: 2016-06-28Bibliographically approved

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