Magnetostructural Transformation and Magnetocaloric Properties of (Ni<sub>37.5</sub>Co<sub>12.5</sub>Mn<sub>35</sub>Ti<sub>15</sub>)<sub>100−x</sub>B<sub>x</sub> (x = 0.0 and 0.4) Melt-Spun Ribbons
The effect of B-doping on the martensitic transformation (MT), microstructure, room temperature (RT) crystal structure, and magnetocaloric properties of a typical all-d-metal Ni<sub>37.5</sub>Co<sub>12.5</sub>Mn<sub>35</sub>Ti<sub>15</sub> quaternary a...
| Main Authors: | , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2024-02-01
|
| Series: | Metals |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2075-4701/14/2/216 |
| _version_ | 1797297489991172096 |
|---|---|
| author | Mauricio López-Cruz Rastislav Varga José Luis Sánchez Llamazares |
| author_facet | Mauricio López-Cruz Rastislav Varga José Luis Sánchez Llamazares |
| author_sort | Mauricio López-Cruz |
| collection | DOAJ |
| description | The effect of B-doping on the martensitic transformation (MT), microstructure, room temperature (RT) crystal structure, and magnetocaloric properties of a typical all-d-metal Ni<sub>37.5</sub>Co<sub>12.5</sub>Mn<sub>35</sub>Ti<sub>15</sub> quaternary alloy was studied by synthesizing melt-spun ribbon samples of nominal composition (Ni<sub>37.5</sub>Co<sub>12.5</sub>Mn<sub>35</sub>Ti<sub>15</sub>)<sub>100−x</sub>B<sub>x</sub> with <i>x</i> = 0.0 and 0.4. For B-free samples, SEM images show a grain-oriented microstructure formed by the columnar in shape-elongated grains with their major axis oriented along the thermal gradient during solidification. By contrast, the B-doped samples show smaller grains whose orientation tends to be perpendicular to the contact surface with the copper wheel. For all samples, austenite (AST) and martensite (MST) phases exhibited a cubic B2-type and 5M monoclinic crystal structure, respectively. The martensitic transition temperature (<i>T</i><sub>M</sub>) and the Curie temperature of the austenite phase (<i>T</i><sub>C</sub><sup>A</sup>) were reduced from 295 K to 253 K and 333 K to 276 K, respectively, with the addition of B. The effect of thermal annealing for different times (from 30 min to 4 h) at 1073 K was studied. Thermal annealing increases the martensitic transformation temperature, whereas <i>T</i><sub>C</sub><sup>A</sup> remains unchanged. The maximum magnetic field-induced entropy changes |Δ<i>S</i><sub>T</sub>|<sup>max</sup> for B-doped samples were around 4.5 J kg<sup>−1</sup> K<sup>−1</sup> and 4.7 J kg<sup>−1</sup> K<sup>−1</sup> for as-solidified and annealed samples (1073 K–4 h), respectively, compared to that found for the undoped samples (i.e., Δ<i>S</i><sub>T</sub> = 16 J kg<sup>−1</sup> K<sup>−1</sup>). However, the entropy reduction is accompanied by an increase in the full width at half-maximum of the ΔS<sub>T</sub>(<i>T</i>) curve. |
| first_indexed | 2024-03-07T22:22:01Z |
| format | Article |
| id | doaj.art-a2a96793f5b144908e04fde61dcc7cc8 |
| institution | Directory Open Access Journal |
| issn | 2075-4701 |
| language | English |
| last_indexed | 2024-03-07T22:22:01Z |
| publishDate | 2024-02-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Metals |
| spelling | doaj.art-a2a96793f5b144908e04fde61dcc7cc82024-02-23T15:27:23ZengMDPI AGMetals2075-47012024-02-0114221610.3390/met14020216Magnetostructural Transformation and Magnetocaloric Properties of (Ni<sub>37.5</sub>Co<sub>12.5</sub>Mn<sub>35</sub>Ti<sub>15</sub>)<sub>100−x</sub>B<sub>x</sub> (x = 0.0 and 0.4) Melt-Spun RibbonsMauricio López-Cruz0Rastislav Varga1José Luis Sánchez Llamazares2Instituto Potosino de Investigación Científica y Tecnológica A.C., Camino a la Presa San José 2055, Col. Lomas 4ª, San Luis Potosí 78216, MexicoCentre for Progressive Materials, Technology, and Innovation Park, Pavol Jozef Safarik University in Kosice, 041 01 Kosice, SlovakiaInstituto Potosino de Investigación Científica y Tecnológica A.C., Camino a la Presa San José 2055, Col. Lomas 4ª, San Luis Potosí 78216, MexicoThe effect of B-doping on the martensitic transformation (MT), microstructure, room temperature (RT) crystal structure, and magnetocaloric properties of a typical all-d-metal Ni<sub>37.5</sub>Co<sub>12.5</sub>Mn<sub>35</sub>Ti<sub>15</sub> quaternary alloy was studied by synthesizing melt-spun ribbon samples of nominal composition (Ni<sub>37.5</sub>Co<sub>12.5</sub>Mn<sub>35</sub>Ti<sub>15</sub>)<sub>100−x</sub>B<sub>x</sub> with <i>x</i> = 0.0 and 0.4. For B-free samples, SEM images show a grain-oriented microstructure formed by the columnar in shape-elongated grains with their major axis oriented along the thermal gradient during solidification. By contrast, the B-doped samples show smaller grains whose orientation tends to be perpendicular to the contact surface with the copper wheel. For all samples, austenite (AST) and martensite (MST) phases exhibited a cubic B2-type and 5M monoclinic crystal structure, respectively. The martensitic transition temperature (<i>T</i><sub>M</sub>) and the Curie temperature of the austenite phase (<i>T</i><sub>C</sub><sup>A</sup>) were reduced from 295 K to 253 K and 333 K to 276 K, respectively, with the addition of B. The effect of thermal annealing for different times (from 30 min to 4 h) at 1073 K was studied. Thermal annealing increases the martensitic transformation temperature, whereas <i>T</i><sub>C</sub><sup>A</sup> remains unchanged. The maximum magnetic field-induced entropy changes |Δ<i>S</i><sub>T</sub>|<sup>max</sup> for B-doped samples were around 4.5 J kg<sup>−1</sup> K<sup>−1</sup> and 4.7 J kg<sup>−1</sup> K<sup>−1</sup> for as-solidified and annealed samples (1073 K–4 h), respectively, compared to that found for the undoped samples (i.e., Δ<i>S</i><sub>T</sub> = 16 J kg<sup>−1</sup> K<sup>−1</sup>). However, the entropy reduction is accompanied by an increase in the full width at half-maximum of the ΔS<sub>T</sub>(<i>T</i>) curve.https://www.mdpi.com/2075-4701/14/2/216all-d-metal Ni-Co-Mn-Ti-B ribbonsmartensitic transformationmagnetic entropy change |
| spellingShingle | Mauricio López-Cruz Rastislav Varga José Luis Sánchez Llamazares Magnetostructural Transformation and Magnetocaloric Properties of (Ni<sub>37.5</sub>Co<sub>12.5</sub>Mn<sub>35</sub>Ti<sub>15</sub>)<sub>100−x</sub>B<sub>x</sub> (x = 0.0 and 0.4) Melt-Spun Ribbons Metals all-d-metal Ni-Co-Mn-Ti-B ribbons martensitic transformation magnetic entropy change |
| title | Magnetostructural Transformation and Magnetocaloric Properties of (Ni<sub>37.5</sub>Co<sub>12.5</sub>Mn<sub>35</sub>Ti<sub>15</sub>)<sub>100−x</sub>B<sub>x</sub> (x = 0.0 and 0.4) Melt-Spun Ribbons |
| title_full | Magnetostructural Transformation and Magnetocaloric Properties of (Ni<sub>37.5</sub>Co<sub>12.5</sub>Mn<sub>35</sub>Ti<sub>15</sub>)<sub>100−x</sub>B<sub>x</sub> (x = 0.0 and 0.4) Melt-Spun Ribbons |
| title_fullStr | Magnetostructural Transformation and Magnetocaloric Properties of (Ni<sub>37.5</sub>Co<sub>12.5</sub>Mn<sub>35</sub>Ti<sub>15</sub>)<sub>100−x</sub>B<sub>x</sub> (x = 0.0 and 0.4) Melt-Spun Ribbons |
| title_full_unstemmed | Magnetostructural Transformation and Magnetocaloric Properties of (Ni<sub>37.5</sub>Co<sub>12.5</sub>Mn<sub>35</sub>Ti<sub>15</sub>)<sub>100−x</sub>B<sub>x</sub> (x = 0.0 and 0.4) Melt-Spun Ribbons |
| title_short | Magnetostructural Transformation and Magnetocaloric Properties of (Ni<sub>37.5</sub>Co<sub>12.5</sub>Mn<sub>35</sub>Ti<sub>15</sub>)<sub>100−x</sub>B<sub>x</sub> (x = 0.0 and 0.4) Melt-Spun Ribbons |
| title_sort | magnetostructural transformation and magnetocaloric properties of ni sub 37 5 sub co sub 12 5 sub mn sub 35 sub ti sub 15 sub sub 100 x sub b sub x sub x 0 0 and 0 4 melt spun ribbons |
| topic | all-d-metal Ni-Co-Mn-Ti-B ribbons martensitic transformation magnetic entropy change |
| url | https://www.mdpi.com/2075-4701/14/2/216 |
| work_keys_str_mv | AT mauriciolopezcruz magnetostructuraltransformationandmagnetocaloricpropertiesofnisub375subcosub125submnsub35subtisub15subsub100xsubbsubxsubx00and04meltspunribbons AT rastislavvarga magnetostructuraltransformationandmagnetocaloricpropertiesofnisub375subcosub125submnsub35subtisub15subsub100xsubbsubxsubx00and04meltspunribbons AT joseluissanchezllamazares magnetostructuraltransformationandmagnetocaloricpropertiesofnisub375subcosub125submnsub35subtisub15subsub100xsubbsubxsubx00and04meltspunribbons |