Naslov
Vegard`s Law and Properties of Amorphous Copper

Autori
Ristić, Ramir ; Zadro, Krešo ; Cooper, John Robert ; Ivkov, Jovica ; Babić, Emil

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Izvornik
Yucomat 2014 / Uskoković, Dragan ; Radmilović, Velimir - Beograd : Materials Research Society of Serbia, 2014, 82-82

Skup
Yucomat 2014

Mjesto i datum
Herceg Novi, Crna Gora, 01.09.2014. - 05.09.2014

Vrsta sudjelovanja
Poster

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
Metallic glasses; Mechanical properties; Thermodynamic properties

Sažetak
Properties of nonmagnetic amorphous TE-TL alloys (TE=Ti, Zr, Hf ; TL=Ni, Cu) have been studied over a broad concentration range in order to estimate the parameters associated with the electronic and atomic structure in pure amorphous Ti, Zr and Hf [1]. We achieved this by extrapolating approximately linear variation of the data for alloys to zero TL content. Here we show that the same data can also be used to obtain the properties of pure amorphous cooper. This is correlated with the validity of the Vegard´s law for atomic volumes in amorphous Ti-Cu and Zr-Cu alloys [2] which extends also to Hf-Cu alloys. The reliability of results is supported by the fact that irrespective of TE, the variations of all studied properties of amorphous TE-Cu alloys extrapolate to the same value for amorphous Cu. Depending on a particular property, their values are either close/somewhat below those for crystalline copper, or are close to those of liquid copper. As already noted, the electronic transport properties extrapolate to those of liquid Cu, whereas the electronic density of states, the Debye temperature and the Young´s modulus are close or little lower than those of crystalline Cu. As expected, the microhardness, Hv , of amorphous Cu is much larger than that of crystalline copper due to absence of extended defects. The results are discussed in some detail and their impact on present understanding of amorphous TE-TL alloys (which is crucial for understanding of formation of bulk metallic glasses) emphasized.

Izvorni jezik
Engleski

Znanstvena područja
Fizika

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