Structure and superconductivity of tin-containing hftizrsnm (M = cu, fe, nb, ni) medium-entropy and high-entropy alloys
Journal article, 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
Author
Darja Gačnik
Jozef Stefan Institute
A. Jelen
Jozef Stefan Institute
Mitja Krnel
Jozef Stefan Institute
S. Vrtnik
Jozef Stefan Institute
J. Luzar
Jozef Stefan Institute
P. Koželj
University of Ljubljana
Jozef Stefan Institute
Marion van Midden
Jozef Stefan Institute
Erik Zupanič
Jozef Stefan Institute
Magdalena Wencka
Polish Academy of Sciences
Jozef Stefan Institute
A. Meden
University of Ljubljana
Q. Hu
Jiangxi Academy of Sciences
Sheng Guo
Chalmers, Industrial and Materials Science, Materials and manufacture
J. Dolinšek
Jozef Stefan Institute
University of Ljubljana
Materials
19961944 (eISSN)
Vol. 14 14 3953Subject Categories
Other Materials Engineering
Metallurgy and Metallic Materials
Corrosion Engineering
Areas of Advance
Materials Science
DOI
10.3390/ma14143953
PubMed
34300872