Transformation Temperatures and Electrochemical behavior of Polycrystalline Fe-Doped Ni-Mn-Ga and Co-Ni-Ga Alloys
The effect of Fe addition on martensitic transformation temperatures and electrochemical behavior was studied in polycrystalline Ni51.4Mn24.8-XGa23.8FeX alloys (1˂x˂2.2) and Co38.3Ni32.1Ga29.6 as alternative to Ni-Mn-Ga alloys which are used as ferromagnetic shape memory alloys. The analysis of corr...
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| Formato: | Artículo |
| Lenguaje: | inglés |
| Publicado: |
2018
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| Acceso en línea: | http://eprints.uanl.mx/16189/1/106.pdf |
| _version_ | 1824414528365920256 |
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| author | Sanchez Carrillo, M. |
| author_facet | Sanchez Carrillo, M. |
| author_sort | Sanchez Carrillo, M. |
| collection | Repositorio Institucional |
| description | The effect of Fe addition on martensitic transformation temperatures and electrochemical behavior was studied in polycrystalline Ni51.4Mn24.8-XGa23.8FeX alloys (1˂x˂2.2) and Co38.3Ni32.1Ga29.6 as alternative to Ni-Mn-Ga alloys which are used as ferromagnetic shape memory alloys. The analysis of corrosion rates was conducted by cyclic polarization curves with potentiostat-galvanostat equipment. The corrosion morphologies were also analyzed by scanning electron microscopy (SEM). The kinetics of corrosion was found to decrease with increasing Fe content in the alloy, while the martensitic transformation temperatures increased with increasing Fe content. The Co38.3Ni32.1Ga29.6 alloy shows icorr lower than the Ni-Mn-Ga alloy. From results, the studied alloys exhibited a general dissolution in the anodic branch where a spontaneous passive zone occurred at certain potential and some elements like Co, Mn and also Ni were present in a higher percentage in corrosion deposits. |
| format | Article |
| id | eprints-16189 |
| institution | UANL |
| language | English |
| publishDate | 2018 |
| record_format | eprints |
| spelling | eprints-161892020-06-09T20:52:47Z http://eprints.uanl.mx/16189/ Transformation Temperatures and Electrochemical behavior of Polycrystalline Fe-Doped Ni-Mn-Ga and Co-Ni-Ga Alloys Sanchez Carrillo, M. The effect of Fe addition on martensitic transformation temperatures and electrochemical behavior was studied in polycrystalline Ni51.4Mn24.8-XGa23.8FeX alloys (1˂x˂2.2) and Co38.3Ni32.1Ga29.6 as alternative to Ni-Mn-Ga alloys which are used as ferromagnetic shape memory alloys. The analysis of corrosion rates was conducted by cyclic polarization curves with potentiostat-galvanostat equipment. The corrosion morphologies were also analyzed by scanning electron microscopy (SEM). The kinetics of corrosion was found to decrease with increasing Fe content in the alloy, while the martensitic transformation temperatures increased with increasing Fe content. The Co38.3Ni32.1Ga29.6 alloy shows icorr lower than the Ni-Mn-Ga alloy. From results, the studied alloys exhibited a general dissolution in the anodic branch where a spontaneous passive zone occurred at certain potential and some elements like Co, Mn and also Ni were present in a higher percentage in corrosion deposits. 2018-06-05 Article PeerReviewed text en cc_by_nc_nd http://eprints.uanl.mx/16189/1/106.pdf http://eprints.uanl.mx/16189/1.haspreviewThumbnailVersion/106.pdf Sanchez Carrillo, M. (2018) Transformation Temperatures and Electrochemical behavior of Polycrystalline Fe-Doped Ni-Mn-Ga and Co-Ni-Ga Alloys. International Journal of Electrochemical Science. pp. 6666-6675. ISSN 14523981 http://doi.org/10.20964/2018.07.08 doi:10.20964/2018.07.08 |
| spellingShingle | Sanchez Carrillo, M. Transformation Temperatures and Electrochemical behavior of Polycrystalline Fe-Doped Ni-Mn-Ga and Co-Ni-Ga Alloys |
| thumbnail | https://rediab.uanl.mx/themes/sandal5/images/online.png |
| title | Transformation Temperatures and Electrochemical behavior of Polycrystalline Fe-Doped Ni-Mn-Ga and Co-Ni-Ga Alloys |
| title_full | Transformation Temperatures and Electrochemical behavior of Polycrystalline Fe-Doped Ni-Mn-Ga and Co-Ni-Ga Alloys |
| title_fullStr | Transformation Temperatures and Electrochemical behavior of Polycrystalline Fe-Doped Ni-Mn-Ga and Co-Ni-Ga Alloys |
| title_full_unstemmed | Transformation Temperatures and Electrochemical behavior of Polycrystalline Fe-Doped Ni-Mn-Ga and Co-Ni-Ga Alloys |
| title_short | Transformation Temperatures and Electrochemical behavior of Polycrystalline Fe-Doped Ni-Mn-Ga and Co-Ni-Ga Alloys |
| title_sort | transformation temperatures and electrochemical behavior of polycrystalline fe doped ni mn ga and co ni ga alloys |
| url | http://eprints.uanl.mx/16189/1/106.pdf |
| work_keys_str_mv | AT sanchezcarrillom transformationtemperaturesandelectrochemicalbehaviorofpolycrystallinefedopednimngaandconigaalloys |