Prionjivost nanostrukturiranih keramičkih prevlaka

undergraduate thesis

• Title (english): Adhesion of nanostructured ceramic films
• Author: Tomislav Razum
• Mentor: Krešimir Grilec (mentor)
• Granter: University of Zagreb; Faculty of Mechanical Engineering and Naval Architecture; Zagreb
• Defense date and country: 2014-09-22, Croatia
• Scientific / art field, discipline and subdiscipline: TECHNICAL SCIENCES; Mechanical Engineering

Abstract

Sol-gel tehnika prevlačenja se nakon što je otkrivena krajem 19. stoljeća ponovo počela jako razvijati u zadnjih 40ak godina. Pomoću ovog postupka moguće je formirati prevlake željenih svojstava što uvelike produljuje životni vijek izradaka zbog veće otpornosti na trošenje i koroziju. U ovom radu je korišteno šest uzoraka od nehrđajućeg čelika oznake X5 CrNi 18-10 (AISI 304) prevučenih sol-gel tehnikom. Na dva uzorka nanesena je TiO2 prevlaka, na dva uzorka ZrO2 prevlaka te na preostala dva njihova kombinacija TiO2-ZrO2. Nakon nanošenja prevlaka na nehrđajući čelik ispitana je njihova prionjivost Rockwell C postupkom. Dijamantnim penetratorom se probila prevlaka te je nastala pukotina koja se analizira mikroskopom. Rezultati ispitivanja pokazali su da najbolju prionjivost imaju TiO2 prevlake. Oba uzorka otprilike jednaku i bili bi smješteni u 1. razred po normi VDI 3198, dok najlošiju prionjivost ima uzorak ZrO2 3 D koji je smješten u zadnji, 6. razred po količini mikropukotina i delaminacija. Vrlo blizu njega je i uzorak TiO2-ZrO2 1 A koji je smješten u 5. razred tj. ima lošu prionjivost. Preostala dva uzorka imaju dobru prionjivost, uzorak ZrO2 2 C je smješten u 1. razred a TiO2-ZrO2 2 B u 3. razred po navedenoj normi.

Abstract (english)

Sol-gel coating technique, which was discovered in the late 19th century, once again strongly began to develope during the last 40 years. With this procedure it is possible to form a coating of desired properties which greatly extends the life of workpieces due to greater resistance to wear and corrosion. In this paper we used six samples of stainless steel tagged X5 CrNi 18-10 (AISI 304) coated with sol-gel technique. Two samples were loaded with TiO2 coating, two samples with ZrO2 coating and the remaining two were a combination of TiO2-ZrO2. After application of the coating on the stainless steel their adhesion was tested using Rockwell C method. A diamond penetrator was used to penetrate the coating which resulted in cracks that were analyzed under a microscope. Test results showed that the best adhesion was achieved using TiO2 coatings. Both samples, of approximately the same adhesivity, would be placed in the first class by the standards VDI 3198, while ZrO2 had the worst adhesion of ZrO2 3 D, which is located at the last, 6th grade by the amount micro-cracks and delamination. Very close to it is the sample of TiO2 + ZrO2 1 A, which is located in the 5th grade, meaning it has poor adhesion. The remaining two samples have good adhesion. Sample ZrO2 2 C is located in the 1st grade and sample TiO2-ZrO2 2 B in the 3rd grade, according to the mentioned norm.

• Keywords: adhezija; prionjivost; Rockwell; sol-gel; nanotehnologija; scratchtest; titan; cink; keramičke prevlake
• Keywords (english): adhesion; nanotechnology; titanium; zinc; ceramic films
• Language: croatian
• URN:NBN: urn:nbn:hr:235:686401
• Study programme: Title: Mechanical Engineering; Study programme type: university; Study level: undergraduate; Academic / professional title: sveučilišni/a prvostupnik/ prvostupnica (baccalaureus/baccalaurea) inženjer/inženjerka strojarstva (sveučilišni/a prvostupnik/ prvostupnica (baccalaureus/baccalaurea) inženjer/inženjerka strojarstva)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Open access
• Created on: 2019-05-22 11:35:07