Dataset on the microstructure Ni50Mn38Sb9Si3 alloy and compositions of Ni50Mn38Sb12−xSix (x=2.5, 3) ferromagnetic shape memory alloys

The data presented in this article is the supplementary data of Zhang et al. (2018) [1]. The Ni50Mn38Sb9Si3 alloy is annealed at 1223 K for 24 h and then quenched into ice water; while the Ni50Mn38Sb9.5Si2.5 alloy is annealed at 1173 K for 24 h and then quenched into ice water. The microstructure of the Ni50Mn38Sb9Si3 alloy indicates that a higher heat treatment temperature cannot prevent the formation of secondary phases. Furthermore, the composition of α phase is similar to the nominal composition of the alloy. On the other hand, the nominal concentration of Si atoms and heat-treatment temperature do not affect the compositions of the β and γ phases. For example, the compositions of the β and γ phases in the Ni50Mn38Sb9Si3 alloy are similar when annealed at 1223 K for 24 h and 1173 K for 24 h


a b s t r a c t
The data presented in this article is the supplementary data of Zhang et al. (2018) [1]. The Ni 50 Mn 38 Sb 9 Si 3 alloy is annealed at 1223 K for 24 h and then quenched into ice water; while the Ni 50 Mn 38 Sb 9.5 Si 2.5 alloy is annealed at 1173 K for 24 h and then quenched into ice water. The microstructure of the Ni 50 Mn 38 Sb 9 Si 3 alloy indicates that a higher heat treatment temperature cannot prevent the formation of secondary phases. Furthermore, the composition of α phase is similar to the nominal composition of the alloy. On the other hand, the nominal concentration of Si atoms and heat-treatment temperature do not affect the compositions of the β and γ phases. For example, the compositions of the β and γ The data are available with this article.

Value of the data
This data fulfills the microstructure of Ni 50 Mn 38 Sb 9 Si 3 alloy that was annealed at 1223 K for 24 h and then quenched into ice water.
This data presents the compositions of α, β and γ phases in Ni 50 Mn 38 Sb 9.5 Si 2.5 and Ni 50 Mn 38 Sb 9 Si 3 alloys, which were annealed at 1173 and 1223 K for 24 h, respectively, and then quenched into ice water.
This data are useful in understanding the influence of the nominal concentration of Si atoms and heat-treatment temperature on the compositions of α, β and γ phases in Si-doped Ni-Mn-Sb-Si alloys.

Data
The dataset of this article provides information on the microstructure of Ni 50 Mn 38 Sb 9 Si 3 alloy annealed at higher temperature and the compositions of α, β and γ phases in Ni 50 Mn 38 Sb 12−x Si x (x ¼2.5, 3) alloys. Fig. 1 shows the microstructure of the Ni 50 Mn 38 Sb 9 Si 3 alloy annealed at 1223 K for 24 h and then quenched into ice water. Table 1 shows the compositions of α, β and γ phases in Ni 50 Mn 38 Sb 12−x Si x (x ¼2.5, 3) alloys at two different heat treatment conditions. The heat treatment process of the Ni 50 Mn 38 Sb 12-x Si x (x ¼2.5, 3) alloys was similar to Ref. [2]. The as-cast ingots were placed in a quartz tube, evacuated and sealed using an oxygen-acetylene flame. Then the ingot of Ni 50 Mn 38 Sb 9.5 Si 2.5 (NMSS2.5) alloy was annealed at 1173 K for 24 h, and then quenched into ice water. This alloy ingot was used to investigate the effect of Si content on the compositions of α, β and γ phases. The ingot of Ni 50 Mn 38 Sb 9 Si 3 (NMSS3) alloy was annealed at 1223 K for 24 h and then quenched into ice water, which was used to explore the effect of higher heat treatment temperature on the formation of the α, β and γ phases. The compositions of α, β and γ phases in Ni 50 Mn 38 Sb 12−x Si x (x ¼2.5, 3) alloys at two different heat treatment conditions were investigated and the influence of the nominal concentration of Si atoms and annealing temperature on the composition of α, β and γ phases in Ni-Mn-Sb-Si alloys was revealed. Fig. 1 showed that higher heat treatment temperature could not prevent the formation of secondary phases (β, γ); however, the quantity of these secondary phases decreased obviously. Table 1 presented that the atomic content of α, β and γ phases in NMSS2.5 and NMSS3 alloy obeyed the same trend as that in NMSS3 alloy, which has been discussed in the article. Additionally, the composition of the γ phase seemed to be independent of the nominal concentration of Si atoms and the heat treatment temperature.

Alloys
Phases