Metalna stakla

master's thesis

• Author: Josip Lukač
• Mentor: Krešo Zadro (mentor)
• Committee member: Krešo Zadro (predsjednik povjerenstva)
• Committee member: Željko Skoko (član povjerenstva)
• Committee member: Josip Tambača (član povjerenstva)
• Committee member: Dražen Adamović (član povjerenstva)
• Committee member: Damir Pajić (član povjerenstva)
• Granter: University of Zagreb; Faculty of Science; (Department of Mathematics); Zagreb
• Granter: University of Zagreb; Faculty of Science; (Department of Physics); Zagreb
• Defense date and country: 2014-07-11, Croatia
• Scientific / art field, discipline and subdiscipline: NATURAL SCIENCES; Mathematics
• Scientific / art field, discipline and subdiscipline: NATURAL SCIENCES; Physics

Abstract

Metalna stakla su zajedno s amorfnim strukturama otkriveni 1960. godine s velikim znanstvenim i tehnološkim zanimanjem. Potraga za novim i naprednim materijalima je bilo glavno zanimanje istraživača materijala tijekom prošlih nekoliko godina. Važan napredak je ostvaren u razvijanju mehaničkih, kemijskih i fizikalnih svojstava materijala Metalni materijali su tradicionalno smatrani da su kristalni po prirodi, da posjeduju translacijsku simetriju, tj, da su njihovi građevni atomi uređeni u periodičnu strukturu u svim trima dimenzijama. Međutim, revolucija u konceptu metala dogodila se 1960. godine, kada je Pol Duwez s kalifornijskog Instituta za tehnologiju u Pasadeni, proizveo slitinu u staklenom stanju na bazi aluminija i silicija brzim očvršćivanjem tekućine brzinom koja se približava iznosu od milijun stupnjeva po sekundi. Staklo je bilo koja nekristalna krutina dobivena kontinuiranim hlađenjem iz tekućeg stanja, a amorfna krutina je bilo koja nekristalna struktura dobivena bilo kojom drugom metodom osim kontinuiranim hlađenjem iz tekuće faze. U prvom poglavlju ovog rada vidjeli smo povijesni razvoj masivnih metalnih stakala uključujući i tehnike njihove proizvodnje. U drugom poglavlju govorili smo o metalnim staklima općenito, o sposobnosti oblikovanja stakla, te o termodinamici i kinetici procesa oblikovanja stakla. Treće poglavlje je bilo posvećeno tehnikama proizvodnje metalnih stakala. Ovdje smo govorili o prednostima i nedostacima pojedine metode. U sljedećem poglavlju vidjeli smo neka važna fizikalna svojstva masivnih metalnih stakala: gustoću, viskoznost, električnu otpornost, toplinsku vodljivost. Zadnje poglavlje je bilo posvećeno brojnim primjenama masivnih metalnih stakala.

Abstract (english)

Metallic glasses along with amorphous structures were discovered in 1960 with great scientific, and technological interest. The search for new and advanced materials has been the major preoccupation of materials scientists during the past several years. Significant improvements have been achieved in the mechanical, chemical and physical properties of materials. Metallic materials are traditionally considered crystalline in nature, possessing translational symmetry, that is, their constituent atoms are arranged in a regular and periodic manner in all three dimensions. However, a revolution in the concept of metals was brought about in 1960 when Pol Duwez, at the California Institute of Technology in Pasadena, California, had synthesized an Au-Si alloy in glassy state by rapidly solidifying the liquid at rates approaching a million degrees per second. Glass is any noncrystalline solid obtained by continuous cooling from the liquid state, and amorphous solid is any noncrystalline material obtained by any other method, except by continuous cooling from liquid state. In the first chapter of this work we saw historical development of bulk metallic glasses including the technics of their production. In the second chapter we talked about metallic glasses generally, about glass forming ability and about thermodynamics and kinetics of glass formation. Third chapter was dedicated to methods of obtaining metallic glasses. There we talked about advantages and disadvantages of each method. In the next chapter we saw some important physical properties of bulk metallic glasses: density, electrical resistance, viscosity, thermal conductivity. The last chapter is dedicated to a large number of applications of bulk metallic glasses.

• Keywords: metalna stakla; Pol Duwez; gustoća; viskoznost; električna otpornost; toplinska vodljivost
• Keywords (english): metallic glasses; Pol Duwez; density; electrical resistance; viscosity; thermal conductivity
• Language: croatian
• URN:NBN: urn:nbn:hr:217:078480
• Study programme: Title: Mathematics and Physics Education; specializations in: Mathematics and Physics Education; Course: Mathematics and Physics Education; Study programme type: university; Study level: integrated undergraduate and graduate; Academic / professional title: magistar/magistra edukacije matematike i fizike (magistar/magistra edukacije matematike i fizike)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Open access
• Created on: 2019-02-28 12:13:50