prikaz prve stranice dokumenta Mikrostruktura kompozitne aluminij oksidne - titan oksidne keramike oblikovane lijevanjem suspenzije
  Download
PDF 2.63 MB
undergraduate thesis
Mikrostruktura kompozitne aluminij oksidne - titan oksidne keramike oblikovane lijevanjem suspenzije
Zagreb: University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture, 2020. urn:nbn:hr:235:990435
Soldo, Kata
University of Zagreb
Faculty of Mechanical Engineering and Naval Architecture

Institutional repository: Repository of Faculty of Mechanical Engineering and Naval Architecture University of Zagreb

Cite this document

Soldo, K. (2020). Mikrostruktura kompozitne aluminij oksidne - titan oksidne keramike oblikovane lijevanjem suspenzije (Undergraduate thesis). Zagreb: University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture. Retrieved from https://urn.nsk.hr/urn:nbn:hr:235:990435

Soldo, Kata. "Mikrostruktura kompozitne aluminij oksidne - titan oksidne keramike oblikovane lijevanjem suspenzije." Undergraduate thesis, University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture, 2020. https://urn.nsk.hr/urn:nbn:hr:235:990435

Soldo, Kata. "Mikrostruktura kompozitne aluminij oksidne - titan oksidne keramike oblikovane lijevanjem suspenzije." Undergraduate thesis, University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture, 2020. https://urn.nsk.hr/urn:nbn:hr:235:990435

Soldo, K. (2020). 'Mikrostruktura kompozitne aluminij oksidne - titan oksidne keramike oblikovane lijevanjem suspenzije', Undergraduate thesis, University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture, accessed 14 November 2024, https://urn.nsk.hr/urn:nbn:hr:235:990435

Soldo K. Mikrostruktura kompozitne aluminij oksidne - titan oksidne keramike oblikovane lijevanjem suspenzije [Undergraduate thesis]. Zagreb: University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture; 2020 [cited 2024 November 14] Available at: https://urn.nsk.hr/urn:nbn:hr:235:990435

K. Soldo, "Mikrostruktura kompozitne aluminij oksidne - titan oksidne keramike oblikovane lijevanjem suspenzije", Undergraduate thesis, University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture, Zagreb, 2020. Available at: https://urn.nsk.hr/urn:nbn:hr:235:990435

Metadata
TitleMikrostruktura kompozitne aluminij oksidne - titan oksidne keramike oblikovane lijevanjem suspenzije
Title (english)Microstructure of slip cast alumina-titania composide ceramics
AuthorKata Soldo
MentorKrešimir Grilec (mentor)
GranterUniversity of Zagreb
Faculty of Mechanical Engineering and Naval Architecture
Zagreb
Defense date and country2020-02-28, Croatia
Scientific / art field,
discipline and subdiscipline		TECHNICAL SCIENCES
Mechanical Engineering
Abstract
Kompozitna keramika se smatra podskupinom keramike i kompozitnih materijala. Kompozitni materijali sastoje se od najmanje dva dijela: ojačala, koje daje posebna mehanička svojstva poput krutosti i čvrstoće i matrice koja drži sve zajedno. Al2O3 - TiO2 je dvofazni kompozit u kojem se titanov dioksid koristi za pojačanje aluminijevog oksida. Ima visoku emisiju pod vakuumom na visokim temperaturama u dužem periodu, nisku toplinsku vodljivost, izuzetno nizak koeficijent toplinske rastezljivosti, a samim tim i veliku otpornost na promjene temperature, malu kvašljivost rastaljenim aluminijem i obojenim metalima. Zbog mnogih povoljnih svojstava, primjena kompozitne keramike je široka: solarna svemirska energija, visokofrekventna tehnika, biomedicinski procesi, elektroničke i optičke primjene, ljevarstvo. Pripravljene su četiri skupine suspenzija s različitim udjelima aluminijevog i titanovog oksida: (i) 100% Al2O3, (ii) 99,5% Al2O3 + 0,5% TiO2, (iii) 99% Al2O3 + 1%TiO2, (iiii) 95% Al2O3 + 5% TiO2. Pripravljene suspenzije su homogenizirane u planetarnom kugličnom mlinu, te tretirane u ultrazvučnoj kupelji. Potom su provedena reološka ispitivanja da bi se odredio optimalni sadržaj disperzanata. Jedan od posljednjih koraka pri proizvodnji uzoraka je lijevanje u gipsane kalupe i sinteriranje. Na kraju je provedena analiza skenirajućim elektronskim mikroskopom.
Abstract (english)
Composite ceramics are considered as a subset of ceramics and composite materials. Composite materials consist of at least two parts: reinforcers, which give special mechanical properties such as rigidity and strength, and a matrix that holds everything together. Al2O3 - TiO2 is a two-phase composite in which titanium dioxide is used to reinforce aluminum oxide. It has high vacuum emission at high temperatures for long periods, low thermal conductivity, extremely low coefficient of thermal expansion, and therefore high resistance to temperature changes, low wettability with molten aluminum and non-ferrous metals. Due to its many favorable properties, the application of composite ceramics is wide-ranging: solar space energy, high-frequency technology, biomedical processes, electronic and optical applications, foundry. Four groups of suspensions were prepared with different proportions of aluminum and titanium oxide: (i) 100% Al2O3, (ii) 99.5% Al2O3 + 0.5% TiO2, (iii) 99% Al2O3 + 1% TiO2, (iiii) 95 % Al2O3 + 5% TiO2. The prepared suspensions were homogenized in a planetary ball mill and treated in an ultrasonic bath. Rheological tests were then performed to determine the optimum dispersant content. One of the last steps in the production of samples is casting in plaster molds and sintering. Finally, the analysis was performed by scanning electron microscope.
Keywords
Languagecroatian
URN:NBNurn:nbn:hr:235:990435
Study programmeTitle: 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 resourceText
File originBorn digital
Access conditionsOpen access
Terms of useLicence In copyright icon
Created on2020-02-21 11:07:13