Microstructure and magnetic properties of Cu-Co alloys after high pressure torsion

• Autorzy: Korneva A. , Kogtenkova O. , Protasova S. , Straumal B. , Mazilkin A. , Kurmanaeva L. , Zięba P.

Warianty tytułu

PL

Mikrostruktura i właściwości magnetyczne stopów Cu-Co po skręcaniu pod wysokim ciśnieniu

• Języki publikacji: EN

Abstrakty

EN

The microstructure and magnetic properties of binary Cu-Co alloys are studied. The investigations have been carried out using samples in two structural states, i.e. as-cast and after severe plastic deformation by the high-pressure torsion (HPT). HPT carried out at the ambient temperature and pressure of 6 GPa. The grain size after HPT is in the nanometer range. HPT allows one to control the ratio between ferromagnetic and superparamagnetic precipitates in the diamagnetic matrix.

PL

Badano mikrostrukturę i właściwości magnetyczne stopów Cu-Co zawierających 2,2 oraz 4,9% mas. Co. Badania przeprowadzono na próbkach w dwóch stanach strukturalnych, tj. odlewanych i po intensywnym odkształceniu plastycznym przez skręcanie pod wysokim ciśnieniem (HPT). HPT przeprowadzono w temperaturze otoczenia pod ciśnieniem 6 GPa. Uzyskany rozmiar ziaren był rzędu nanometrów. Wyniki pomiarów namagnesowania wykazały, że HPT pozwala kontrolować proporcję między ferromagnetycznymi i superparamagnetycznymi wydzieleniami w matrycy diamagnetycznej.

Słowa kluczowe

EN

severe plastic deformation; high pressure torsion; Cu-Co alloys

PL

intensywne odkształcenie plastyczne; skręcanie pod wysokim ciśnieniem; stopy Cu-Co

• Wydawca: Wydawnictwo SIGMA-NOT
• Czasopismo: Inżynieria Materiałowa
• Rocznik: 2013
• Tom: Vol. 34, nr 4
• Strony: 306--309
• Opis fizyczny: Bibliogr. 27 poz., rys., tab.

Twórcy

autor

Korneva A.

• Institute of Metallurgy and Materials Science, Polish Academy of Science

autor

Kogtenkova O.

• Institute of Solid State Physics, Russian Academy of Sciences

autor

Protasova S.

• Institute of Solid State Physics, Russian Academy of Sciences

autor

Straumal B.

• Karlsruher Institut fur Technologie, Germany

autor

Mazilkin A.

• Institute of Solid State Physics, Russian Academy of Sciences

autor

Kurmanaeva L.

• Karlsruher Institut fur Technologie, Germany

autor

Zięba P.

• Institute of Metallurgy and Materials Science, Polish Academy of Science

Bibliografia

• [1] Ueda Y., Ikeda S.: Magnetoresistance in Co-Cu alloys prepared by the mechanical alloying. Mater. Trans. JIM 36 (1995) 384÷388.
• [2] Champion Y., Meyer H., Bonnentien J. L., Chassaing E.: Fabrication of Cu-Co nanogranular bulk materials by mixing of nanocrystalline powders. J. Magn. Magn. Mater. 241 (2002) 357÷363.
• [3] Fan X., Mashimo T., Huang X., Kagayama T., Chiba A., Koyama K., Motokawa M.: Magnetic properties of Co-Cu metastable solid solution alloys. Phys. Rev. B 69 (2004) 094432.
• [4] Rattanasakulthong W., Sirisathitkul C.: Large negative magnetoresistance in capsulated Co-Cu powder prepared by mechanical alloying. Physica B 369 (2005) 160÷167.
• [5] Mondal B. N., Basumallick A., Chattopadhyay P. P.: Magnetic properties of binary Cu50-(Ni, Fe and Co)50 alloys prepared by ball milling and isothermal annealing. Mater. Chem. Phys. 110 (2008) 490÷493.
• [6] Wang T., Li F. S., Wang Y., Song L. J.: Structure and magnetic properties of metastable Co-Cu solid solution nanowire arrays fabricated by electrodeposition. Phys. Stat. Sol. A 203 (2006) 2426÷2431.
• [7] Li H., Liao S. J.: Synthesis of flower-like Co microcrystals composed of Co nanoplates in water/ethanol mixed solvent. J. Phys. D 41 (2008) 06500.
• [8] Wang X. W., Fei G. T., Tong P., Xu X. J., Zhang L. D.: Structural control and magnetic properties of electrodeposited Co nanowires. J. Cryst. Growth 300 (2007) 421÷425.
• [9] Bhuiyan M. S., Taylor B. J., Paranthaman M., Thompson J. R., Sinclair J. W.: Microstructure and magnetic properties of electrodeposited cobalt films. J. Mater. Sci. 43 (2008) 1644÷1649.
• [10] Steinmuller S. J., Vaz C. A. F., Ström V., Moutafis C., Tse D. H. Y., Gürtler C. M., Kläui M., Bland J. A. C., Cui Z.: Effect of substrate roughness on the magnetic properties of thin fcc Co films. Phys. Rev. B 76 (2007) 054429.
• [11] Gräf C., Biiringer R., Michels A.: Synthesis and magnetic properties of cobalt nanocubes. Phys. Rev. B 73 (2006) 212401.
• [12] Wecker J., Vonhelmolt R., Schultz L., Samwer K.: Giant magnetoresistance in melt spun Cu Co alloys. Appl. Phys. Lett. 62 (1993) 1985÷1987.
• [13] Meneghini C., Mobilio S., Garcia-Prieto A., Fdez-Gubieda M. L. F.: Structure and magnetic properties in CoCu granular alloys. Nucl. Instr. Meth. Phys. Res. B 200 (2003) 215÷219.
• [14] Miranda M. G. M., Estevez-Rams E., Martinez G., Baibich M. N.: Phase separation in Cu90Co10 high-magnetoresistance materials. Phys. Rev. B 68 (2003) 014434.
• [15] Fabietti L. M., Urreta S. E.: Structure and magnetic properties of Cu-10 wt % Co alloys processed by twin roller melt spinning. Phys. B Cond. Mat. 398 (2007) 348÷351.
• [16] Juarez G., Villafuerte M., Heluani S.: Magnetic, resistive and magnetoresistive properties of melt spun CoCu alloys. J. Magn. Magn. Mater. 320 (2008) E22÷E24.
• [17] Valiev R. Z., Islamgaliev R. K., Alexandrov I. V.: Bulk nanostructured materials from severe plastic deformation. Progr. Mater. Sci. 45 (2000) 103÷189.
• [18] Valiev R. Z., Langdon T. G.: Principles of equal-channel angular pressing as a processing tool for grain refinement. Progr. Mater. Sci. 51 (2006) 881÷981.
• [19] Valiev R. Z., Murashkin M. Y., Kilmametov A, Straumal B. B., Chinh N. Q., Langdon T. G.: Unusual super-ductility at room temperature in an ultrafine-grained aluminum alloy. J. Mater. Sci. 45 (2010) 4718÷4724.
• [20] Chinh N. Q., Csanádi T., Györi T., Valiev R. Z., Straumal B. B., Kawasaki M., Langdon T.G.: Strain rate sensitivity studies in an ultrafine- grained Al-30 wt % Zn alloy using micro- and nanoindentetion. Mater. Sci. Eng. A 543 (2012) 117÷120.
• [21] Massalski T. B. et al.: (Eds) Binary alloy phase diagrams. Materials Park: ASM Intemational (1993).
• [22] Chikazumi S.: Physics of ferromagnetism. Oxford: Clarendon press (1997).
• [23] Kronmüller H.: Handbook of magnetism and advanced magnetic materials. Hoboken etc. John Wiley & Sons (2007).
• [24] Errahmani H., Berrada A., Schmerber G., Dinia A.: Correlation between magnetotranspoit properties and the microstructure of the Co20Cug0 granular alloy. J. Magn. Magn. Mater. 238 (2002) 145÷154.
• [25] Uimin M. A., Korobeinikov A. Y., Yermakov A. Y., Khrabrov V. I., Shtolz A. K.: lnfiuence of milling temperature on the mechanical alloying and magnetic properties of Cu-Co and Cu-Fe systems. Mater. Sci. Forum 360 (2001) 289÷294.
• [26] Ivchenko V. A., Wanderka N., Czubayko U., Naundorf V., Yermakov A. Y., Uimin M. A., Wollenberger H.: Mechanically alloyed nanocrystalline Cug0Co20 investigated by AP/FIM and 3DAP. Mater. Sci. Forum 343 (2000) 709÷714.
• [27] Fujita T., Nishimura S., Fujinami T., Kaneko K., Horita Z., Smith D. J.: Application of equal-channel angular pressing to Cu-Co alloy with ferromagnetic precipitates. Mater. Sci. Eng. A 417 (2006) 149÷157.