Structure and superconductivity of tin-containing hftizrsnm (M = cu, fe, nb, ni) medium-entropy and high-entropy alloys
Artikel i vetenskaplig tidskrift, 2021

In an attempt to incorporate tin (Sn) into high-entropy alloys composed of refractory metals Hf, Nb, Ti and Zr with the addition of 3d transition metals Cu, Fe, and Ni, we synthesized a series of alloys in the system HfTiZrSnM (M = Cu, Fe, Nb, Ni). The alloys were characterized crystallographically, microstructurally, and compositionally, and their physical properties were determined, with the emphasis on superconductivity. All Sn-containing alloys are multi-phase mixtures of intermetallic compounds (in most cases four). A common feature of the alloys is a microstructure of large crystalline grains of a hexagonal (Hf, Ti, Zr)5Sn3 partially ordered phase embedded in a matrix that also contains many small inclusions. In the HfTiZrSnCu alloy, some Cu is also incorporated into the grains. Based on the electrical resistivity, specific heat, and magnetization measurements, a superconducting (SC) state was observed in the HfTiZr, HfTiZrSn, HfTiZrSnNi, and HfTiZrSnNb alloys. The HfTiZrSnFe alloy shows a partial SC transition, whereas the HfTiZrSnCu alloy is non-superconducting. All SC alloys are type II superconductors and belong to the Anderson class of “dirty” superconductors.

Superconductivity

High-entropy alloys

Structure and microstructure

Författare

Darja Gačnik

Institut Jožef Stefan

A. Jelen

Institut Jožef Stefan

Mitja Krnel

Institut Jožef Stefan

S. Vrtnik

Institut Jožef Stefan

J. Luzar

Institut Jožef Stefan

P. Koželj

Univerza V Ljubljani

Institut Jožef Stefan

Marion van Midden

Institut Jožef Stefan

Erik Zupanič

Institut Jožef Stefan

Magdalena Wencka

Polish Academy of Sciences

Institut Jožef Stefan

A. Meden

Univerza V Ljubljani

Q. Hu

Jiangxi Academy of Sciences

Sheng Guo

Chalmers, Industri- och materialvetenskap, Material och tillverkning

J. Dolinšek

Institut Jožef Stefan

Univerza V Ljubljani

Materials

1996-1944 (ISSN)

Vol. 14 14 3953

Ämneskategorier

Annan materialteknik

Metallurgi och metalliska material

Korrosionsteknik

Styrkeområden

Materialvetenskap

DOI

10.3390/ma14143953

PubMed

34300872

Mer information

Senast uppdaterat

2021-08-16