Utjecaj dodatka cirkonijevog oksida na intenzitet abrazijskog trošenja aluminij-oksidne keramike

undergraduate thesis

• Title (english): Influence of zirconium oxide addition on the abrasion wear rate of alumina ceramics
• Author: Paula Cesarec
• Mentor: Vera Rede (mentor)
• Granter: University of Zagreb; Faculty of Mechanical Engineering and Naval Architecture; Zagreb
• Defense date and country: 2020-02-28, Croatia
• Scientific / art field, discipline and subdiscipline: TECHNICAL SCIENCES; Mechanical Engineering

Abstract

Cilj ovoga rada bio je odrediti kako dodatak cirkonijevog oksida utječe na intenzitet abrazijskoga trošenja aluminij-oksidne keramike. Uspoređene su vrijednosti intenziteta abrazijskoga trošenja za monolitnu aluminij-oksidnu keramiku te kompozitnu aluminij-oksidnu keramiku s dodatkom od 1 i 10 % cirkonijevog oksida.
U teorijskom dijelu rada opisana je tehnička keramika s posebnim osvrtom na monolitnu i kompozitnu aluminij-oksidnu keramiku. Također je opisan abrazijski mehanizam trošenja, fenomen kritične veličine abrazivnoga zrna i istaknute su neke specifičnosti abrazijskoga trošenja keramike.
Provedena ispitivanja pokazala su da dodatak cirkonijevog oksida utječe na otpornost na abrazijsko trošenje aluminij-oksidne keramike, pri čemu je veličina abrazivnih čestica značajan čimbenik. Najveća otpornost na abrazijsko trošenje izmjerena je kod kompozitne keramike s 1 % cirkonijevog oksida, a najmanja kod monolitne aluminij-oksidne keramike.
S porastom abrazivnoga zrna intenzitet trošenja kod uzorka s 1 % cirkonijevog oksida kontinuirano raste, a kod uzorka s 10 % cirkonijevog oksida intenzitet trošenja raste eksponencijalno. Fenomen kritične veličine abrazivnoga zrna uočen je samo kod uzorka bez cirkonijevog oksida.

Abstract (english)

The purpose of this paper was to determine how the addition of zirconium oxide affects the abrasion wear rate of alumina ceramics. The values of the abrasion wear rate for monolithic and composite alumina ceramics with the addition of 1-10% of zirconium oxide were compared.
In the theoretical part of this paper, the technical ceramics were described, with a special review of monolithic alumina and composite alumina-zirconium ceramics. Also, the abrasion wear mechanism was described, along with the critical grain size effect. Some specifics of abrasion wear of ceramics were also pointed out.
The results showed that the addition of zirconium oxide affects the abrasion wear rate of alumina ceramics, where the grain size is also an important factor. The biggest resistance to abrasion wear was measured on composite ceramics with 1% zirconium oxide and the lowest values were detected on monolithic alumina ceramics. By increasing the grain size, the wear intensity of the sample with 1% zirconium oxide grows continuously, while the wear intensity of the sample with 10% zirconium oxide grows exponentially. The grain size effect is detected only on the sample without zirconium oxide.

• Keywords: aluminij-oksidna keramika; cirkonijev oksid; intenzitet abrazijskoga trošenja; kritična veličina abrazivnoga zrna
• Keywords (english): alumina; zirconium oxide; abrasion wear rate; grain size effect
• Language: croatian
• URN:NBN: urn:nbn:hr:235:522353
• Project: Number: IP-2016-06-6000; Title: Napredna monolitna i kompozitna keramika za zaštitu od trošenja i korozije; Acronym: WECOR; Leader: Lidija Ćurković; Jurisdiction: Croatia; Funder: HRZZ; Funding stream: IP
• 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: 2020-02-21 10:44:44