Slitine s prisjetljivosti oblika (II. dio): podjela, proizvodnja i primjena

Ivanić, Ivana; Gojić, Mirko; Kožuh, Stjepan

doi:10.15255/kui.2013.017

Cited by 5 publications

(5 citation statements)

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“…Nickel-Titanium Naval Ordnance Laboratory). 47 Iako su Johnson i Alicandri 1968. godine proveli prva ispitivanja na leguri NiTi kao materijalu za implantaciju, NiTi se u medicinske svrhe počeo upotrebljavati tek 1970-ih. Početkom 1980-ih na tržištu su bile dostupne neke ortodontske i ortopedske primjene te legure, a sredinom 1990-ih u medicini su se počeli upotrebljavati prvi stentovi od nitinola.…”

Section: Nitinolunclassified

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Biomaterijali na bazi titana

JAJČINOVIĆ

Benić

2023

Kemija U Industriji

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Ovo djelo je dano na korištenje pod Creative Commons Attribution 4.0 International License Sveučilište u Zagrebu, Metalurški fakultet, Aleja narodnih heroja 3, 44 000 Sisak Sažetak U odnosu na legure na bazi kobalt-kroma i nehrđajuće čelike, titan i legure na bazi titana našle su široku primjenu u biomedicini, gdje se zbog svojih izvrsnih svojstava upotrebljavaju kao implantati, ali zbog visoke cijene njihove proizvodnje još uvijek nemaju širu upotrebu. Neka od bitnih svojstava su: izvrsna biokompatibilnost, dobra mehanička svojstva i oseointegracija te otpornost na koroziju. Uz predstavljanje biomedicinskih materijala koji se najčešće upotrebljavaju, ovaj članak prikazuje razvoj biomaterijala na bazi titana i njihovu biomedicinsku primjenu. Biomaterijali se obično upotrebljavaju u biomedicini za popravak, zamjenu ili regeneraciju tjelesnih tkiva. S obzirom na to da je poznat sve veći broj neuspjelih implantacija uzrokovanih patogenom bakterijskom infekcijom, među funkcijama koje bi se mogle dodati biomaterijalima je antibakterijsko djelovanje, koje je od velike važnosti. U novije vrijeme antibakterijske metalne legure pokazale su velik potencijal kao nova vrsta biomedicinskog materijala. Ključne riječiBiomaterijali, legure titana, metalni implantati, biokompatibilnost * Autor za dopisivanje: Magdalena Jajčinović, mag. ing. met.

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Section: Nitinolunclassified

“…Nitinol posjeduje odlična termoelektrična i termomehanička svojstva. 47 Zahvaljujući dobrim svojstvima nitinol se, osim u medicini, upotrebljava u automobilskoj industriji i zrakoplovstvu. Upotrebljava se za izradu ortodontskih žica odnosno zubnih aparatića, stentova, za izradu dijelova naočala, okvira za prozore, amortizera, senzora itd.…”

Section: Nitinolunclassified

Biomaterijali na bazi titana

JAJČINOVIĆ

Benić

2023

Kemija U Industriji

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“…The main advantages of Cu-Al-Ni alloys are their low price, relatively simple fabrication procedure, better machinability, better work/cost ratio, and high electrical and thermal conductivity compared to other shape memory alloys. 4,5,[12][13][14][15] Also, the stability of the two-way shape memory effect, which is very important in its application as actuators, is superior to that of Ni-Ti alloy. 16 Actuators based on Cu-Al-Ni alloy have been tested for usage as prosthetic actuators, and also actuators made from Cu-Al-Ni single crystals (produced by Nimesis Special Industries) have been reported by NASA to be very good candidates for space applications that need trigger temperatures between 100 and 200 °C.…”

Section: Introductionmentioning

confidence: 99%

“…[17][18] Besides usage in the production of actuators, Cu-Al-Ni shape memory alloys have found their applications in various engineering devices, sensors, automotive and aerospace industries, robotics, etc. 3,12,13,19 Most studies on Cu-Al-Ni shape memory alloys have focused on their microstructure, mechanical and shape memory properties, and possible fields of application, but have neglected their corrosion behaviour, which is very vital for their practical use. The corrosion resistance of Cu-Al alloys has been attributed to the formation of a protective layer of alumina along with copper chlorides and oxides on the alloy surface.…”

Section: Introductionmentioning

confidence: 99%

Intergranular Corrosion of Cu-Al-Ni Alloy in 0.5 mol dm−3 H2SO4 Solution

et al. 2020

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The corrosion behaviour of Cu-Al-Ni alloy in 0.5 mol dm–3 H2SO4 solution was investigated by electrochemical methods including open circuit potential measurement, electrochemical impedance spectroscopy measurements, linear and potentiodynamic polarization. Measurements were performed in 0.5 mol dm–3 H2SO4 at temperatures 20 and 40 °C. After polarization testing, corroded electrode surfaces were ultrasonically cleaned in deionized water and examined by light and scanning electron microscopy, while the elemental composition at individual points of the alloy surface was determined by EDS analysis. The results of the investigations revealed the occurrence of intergranular corrosion on the Cu-Al-Ni surface, which became more pronounced with increasing temperature.

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“…Intermetallic Ni-Ti compound with shape-memory effect is an attractive material for applications in various branches of engineering, e.g. space technology, medicine, robotics and actuator technology [1][2][3][4].…”

Section: Introductionmentioning

confidence: 99%

Numerical Analysis of Continuous Casting of NiTi Shape Memory Alloy

Ternik¹,

Rudolf²

2016

Int. j. simul. model.

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The present study deals with the numerical analysis of the solidification process of NiTi binary alloy in a lab-scale continuous casting device. The physical medium is taken as an incompressible fluid where the heat is transferred by conduction and convection, including the thermal phase change phenomenon. The energy equation which includes both convection-diffusion heat transfer and a mushy region for the phase-change (solidification) is modelled by using an enthalpy-based formulation. The numerical approach is based on the finite volume method in body fitted coordinates with a SIMPLE scheme to couple the pressure and velocity fields.Results show that the casting speed has a significant effect on the temperature distribution and, consequently on the solidification as well as metallurgical length. High casting speed may cause inadequate thickness of the solidified material at the mould exit to withstand the hydrostatic pressure of the molten NiTi below the mould and may also lead to breakout due to sticking of the solidified shell and mould because of lack of slag film for lubrication between the two.

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Slitine s prisjetljivosti oblika (II. dio): podjela, proizvodnja i primjena

Cited by 5 publications

References 50 publications

Biomaterijali na bazi titana

Biomaterijali na bazi titana

Intergranular Corrosion of Cu-Al-Ni Alloy in 0.5 mol dm−3 H2SO4 Solution

Numerical Analysis of Continuous Casting of NiTi Shape Memory Alloy

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