A. S. Eftifeeva, E. A. Bolshevich, S. G. Anikeev, E. I. Yanushonite, E. Yu. Panchenko, Yu. I. Chumlyakov
{"title":"两相CoNiAl（Fe）单晶的耐蚀性研究","authors":"A. S. Eftifeeva, E. A. Bolshevich, S. G. Anikeev, E. I. Yanushonite, E. Yu. Panchenko, Yu. I. Chumlyakov","doi":"10.1007/s11182-025-03482-4","DOIUrl":null,"url":null,"abstract":"<div><p>The effect of a two-phase (B2+γ/γ′)-structure on the corrosion rate is studied in single crystals of the CoNiAl and CoNiAlFe ferromagnetic shape memory alloys. It is shown that the smaller the volume fraction of the secondary γ/γ′-phases, the lower the corrosion rate. It is found out that the Co<sub>35</sub>Ni<sub>35</sub>Al<sub>30</sub> and Co<sub>35</sub>Ni<sub>35</sub>Al<sub>28</sub>Fe<sub>2</sub> single crystals with small volume fractions of γ/γ′-phases have a lower corrosion rate, <i>C</i><sub>corr</sub> = 1.20–1.86∙10<sup>−3</sup> mm/year, compared to that of the Co<sub>40</sub>Ni<sub>33</sub>Al<sub>27</sub> and Co<sub>39</sub>Ni<sub>32</sub>Al<sub>27</sub>Fe<sub>2</sub> single crystals with a large volume fraction of the secondary phases (<i>C</i><sub>corr</sub> = 1.83–2.98∙10<sup>−3</sup> mm/year). This is achieved due to a short length of the interphase B2-γ/γ′-boundary and Fe alloying. The crystals under study demonstrate pitting and intercrystalline corrosion.</p></div>","PeriodicalId":770,"journal":{"name":"Russian Physics Journal","volume":"68 5","pages":"680 - 689"},"PeriodicalIF":0.4000,"publicationDate":"2025-07-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Study of corrosion resistance of two-phase CoNiAl(Fe) single crystals\",\"authors\":\"A. S. Eftifeeva, E. A. Bolshevich, S. G. Anikeev, E. I. Yanushonite, E. Yu. Panchenko, Yu. I. Chumlyakov\",\"doi\":\"10.1007/s11182-025-03482-4\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>The effect of a two-phase (B2+γ/γ′)-structure on the corrosion rate is studied in single crystals of the CoNiAl and CoNiAlFe ferromagnetic shape memory alloys. It is shown that the smaller the volume fraction of the secondary γ/γ′-phases, the lower the corrosion rate. It is found out that the Co<sub>35</sub>Ni<sub>35</sub>Al<sub>30</sub> and Co<sub>35</sub>Ni<sub>35</sub>Al<sub>28</sub>Fe<sub>2</sub> single crystals with small volume fractions of γ/γ′-phases have a lower corrosion rate, <i>C</i><sub>corr</sub> = 1.20–1.86∙10<sup>−3</sup> mm/year, compared to that of the Co<sub>40</sub>Ni<sub>33</sub>Al<sub>27</sub> and Co<sub>39</sub>Ni<sub>32</sub>Al<sub>27</sub>Fe<sub>2</sub> single crystals with a large volume fraction of the secondary phases (<i>C</i><sub>corr</sub> = 1.83–2.98∙10<sup>−3</sup> mm/year). This is achieved due to a short length of the interphase B2-γ/γ′-boundary and Fe alloying. The crystals under study demonstrate pitting and intercrystalline corrosion.</p></div>\",\"PeriodicalId\":770,\"journal\":{\"name\":\"Russian Physics Journal\",\"volume\":\"68 5\",\"pages\":\"680 - 689\"},\"PeriodicalIF\":0.4000,\"publicationDate\":\"2025-07-03\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Russian Physics Journal\",\"FirstCategoryId\":\"101\",\"ListUrlMain\":\"https://link.springer.com/article/10.1007/s11182-025-03482-4\",\"RegionNum\":4,\"RegionCategory\":\"物理与天体物理\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q4\",\"JCRName\":\"PHYSICS, MULTIDISCIPLINARY\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Russian Physics Journal","FirstCategoryId":"101","ListUrlMain":"https://link.springer.com/article/10.1007/s11182-025-03482-4","RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"PHYSICS, MULTIDISCIPLINARY","Score":null,"Total":0}
Study of corrosion resistance of two-phase CoNiAl(Fe) single crystals
The effect of a two-phase (B2+γ/γ′)-structure on the corrosion rate is studied in single crystals of the CoNiAl and CoNiAlFe ferromagnetic shape memory alloys. It is shown that the smaller the volume fraction of the secondary γ/γ′-phases, the lower the corrosion rate. It is found out that the Co35Ni35Al30 and Co35Ni35Al28Fe2 single crystals with small volume fractions of γ/γ′-phases have a lower corrosion rate, Ccorr = 1.20–1.86∙10−3 mm/year, compared to that of the Co40Ni33Al27 and Co39Ni32Al27Fe2 single crystals with a large volume fraction of the secondary phases (Ccorr = 1.83–2.98∙10−3 mm/year). This is achieved due to a short length of the interphase B2-γ/γ′-boundary and Fe alloying. The crystals under study demonstrate pitting and intercrystalline corrosion.
期刊介绍：
Russian Physics Journal covers the broad spectrum of specialized research in applied physics, with emphasis on work with practical applications in solid-state physics, optics, and magnetism. Particularly interesting results are reported in connection with: electroluminescence and crystal phospors; semiconductors; phase transformations in solids; superconductivity; properties of thin films; and magnetomechanical phenomena.
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