Effect of Ti-C and Cr Additions on Magnetic Properties of Nanocrystalline (Pr,Nd)-Fe-B Alloys
The addition of both Ti-C and Cr as grain refiners in Nd-Fe-B nanocomposites substantially increases the coercive field Hc. This motived our investigation of the effect of Ti-C and Cr on Pr-Fe-B nanocomposites. Melt-spun ribbons of composition (Pr 9.5 Fe 84.5 B 6 ) 0.97 - x Cr x (TiC) 0.03 (x = 0; 0...
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| Veröffentlicht in: | IEEE transactions on magnetics 2008-11, Vol.44 (11), p.4258-4261 |
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| creator | de Franco, V.C. Murakami, R.K. Rechenberg, H.R. Yonamine, T. Missell, F.P. Villas-Boas, V. |
| description | The addition of both Ti-C and Cr as grain refiners in Nd-Fe-B nanocomposites substantially increases the coercive field Hc. This motived our investigation of the effect of Ti-C and Cr on Pr-Fe-B nanocomposites. Melt-spun ribbons of composition (Pr 9.5 Fe 84.5 B 6 ) 0.97 - x Cr x (TiC) 0.03 (x = 0; 0.25; 0.5; 0.75; 1) and (Nd 9.5 Fe 84.5 B 6 ) 0.97-x Cr x (TiC) 0.03 ( x = 0.5 and 1) were produced for study. For a Pr nanocomposite with 1% Cr, Hc = 12.5 kOe. However, the energy product was limited to 13.6 MGOe by the remanence value. Rietveld analysis of X-ray spectra showed the ribbons to consist of predominantly hard ( ~ 70 wt%) R 2 Fe 14 B, the soft phase being ( ~ 30 wt%) alpha-Fe. Mossbauer measurements at 300 K are consistent with a reduced hyperfine field for the hard magnetic phase due to the Cr addition. Analysis of transmission electron microscopy images showed the Pr nanocomposite with 1% Cr to have an increased average grain size. |
| doi_str_mv | 10.1109/TMAG.2008.2002243 |
| format | Article |
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This motived our investigation of the effect of Ti-C and Cr on Pr-Fe-B nanocomposites. Melt-spun ribbons of composition (Pr 9.5 Fe 84.5 B 6 ) 0.97 - x Cr x (TiC) 0.03 (x = 0; 0.25; 0.5; 0.75; 1) and (Nd 9.5 Fe 84.5 B 6 ) 0.97-x Cr x (TiC) 0.03 ( x = 0.5 and 1) were produced for study. For a Pr nanocomposite with 1% Cr, Hc = 12.5 kOe. However, the energy product was limited to 13.6 MGOe by the remanence value. Rietveld analysis of X-ray spectra showed the ribbons to consist of predominantly hard ( ~ 70 wt%) R 2 Fe 14 B, the soft phase being ( ~ 30 wt%) alpha-Fe. Mossbauer measurements at 300 K are consistent with a reduced hyperfine field for the hard magnetic phase due to the Cr addition. Analysis of transmission electron microscopy images showed the Pr nanocomposite with 1% Cr to have an increased average grain size.</description><identifier>ISSN: 0018-9464</identifier><identifier>EISSN: 1941-0069</identifier><identifier>DOI: 10.1109/TMAG.2008.2002243</identifier><identifier>CODEN: IEMGAQ</identifier><language>eng</language><publisher>New York, NY: IEEE</publisher><subject>Chromium alloys ; Cr additions ; Cross-disciplinary physics: materials science; rheology ; Exact sciences and technology ; Grain size ; Image analysis ; Iron ; Magnetic analysis ; Magnetic field measurement ; Magnetic properties ; Magnetism ; Materials science ; Minerals ; MÖssbauer spectroscopy ; Nanocomposites ; Nd)-Fe-B ; Neodymium ; Other topics in materials science ; Phase measurement ; Physics ; Pr ; Remanence ; X-ray diffraction (XRD)</subject><ispartof>IEEE transactions on magnetics, 2008-11, Vol.44 (11), p.4258-4261</ispartof><rights>2009 INIST-CNRS</rights><rights>Copyright The Institute of Electrical and Electronics Engineers, Inc. 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This motived our investigation of the effect of Ti-C and Cr on Pr-Fe-B nanocomposites. Melt-spun ribbons of composition (Pr 9.5 Fe 84.5 B 6 ) 0.97 - x Cr x (TiC) 0.03 (x = 0; 0.25; 0.5; 0.75; 1) and (Nd 9.5 Fe 84.5 B 6 ) 0.97-x Cr x (TiC) 0.03 ( x = 0.5 and 1) were produced for study. For a Pr nanocomposite with 1% Cr, Hc = 12.5 kOe. However, the energy product was limited to 13.6 MGOe by the remanence value. Rietveld analysis of X-ray spectra showed the ribbons to consist of predominantly hard ( ~ 70 wt%) R 2 Fe 14 B, the soft phase being ( ~ 30 wt%) alpha-Fe. Mossbauer measurements at 300 K are consistent with a reduced hyperfine field for the hard magnetic phase due to the Cr addition. Analysis of transmission electron microscopy images showed the Pr nanocomposite with 1% Cr to have an increased average grain size.</description><subject>Chromium alloys</subject><subject>Cr additions</subject><subject>Cross-disciplinary physics: materials science; rheology</subject><subject>Exact sciences and technology</subject><subject>Grain size</subject><subject>Image analysis</subject><subject>Iron</subject><subject>Magnetic analysis</subject><subject>Magnetic field measurement</subject><subject>Magnetic properties</subject><subject>Magnetism</subject><subject>Materials science</subject><subject>Minerals</subject><subject>MÖssbauer spectroscopy</subject><subject>Nanocomposites</subject><subject>Nd)-Fe-B</subject><subject>Neodymium</subject><subject>Other topics in materials science</subject><subject>Phase measurement</subject><subject>Physics</subject><subject>Pr</subject><subject>Remanence</subject><subject>X-ray diffraction (XRD)</subject><issn>0018-9464</issn><issn>1941-0069</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2008</creationdate><recordtype>article</recordtype><sourceid>RIE</sourceid><recordid>eNpdkE1r3DAQhkVpods0P6D0IgotCdTpjCVb1nGzJGkhX4ftsQitPCoKjrSVvIf997HZJYdeZhjmeYfhYewTwgUi6B_ru-XNRQ3QzaWupXjDFqglVgCtfssWANhVWrbyPftQytM0ygZhwf5ceU9u5MnzdahW3MaerzJf9n0YQ4qFp8jv7N9IY3D8Mact5TFQmfl7G5PL-zLaYQiR-Nlj_n7fn1fXVF3y5TCkffnI3nk7FDo99hP2-_pqvfpZ3T7c_FotbysnGjFWtlbYyY30DQFa4Z3W0srGda0iJ52tdU-08YjKW4TW6o3WyjkkbQWofiNO2LfD3W1O_3ZURvMciqNhsJHSrhghGwDRdhP45T_wKe1ynH4zup6loBAThAfI5VRKJm-2OTzbvDcIZrZtZttmtm2OtqfM1-NhW5wdfLbRhfIarBEktGrmPh-4QESva6lQSVDiBe2Ehhc</recordid><startdate>20081101</startdate><enddate>20081101</enddate><creator>de Franco, V.C.</creator><creator>Murakami, R.K.</creator><creator>Rechenberg, H.R.</creator><creator>Yonamine, T.</creator><creator>Missell, F.P.</creator><creator>Villas-Boas, V.</creator><general>IEEE</general><general>Institute of Electrical and Electronics Engineers</general><general>The Institute of Electrical and Electronics Engineers, Inc. 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This motived our investigation of the effect of Ti-C and Cr on Pr-Fe-B nanocomposites. Melt-spun ribbons of composition (Pr 9.5 Fe 84.5 B 6 ) 0.97 - x Cr x (TiC) 0.03 (x = 0; 0.25; 0.5; 0.75; 1) and (Nd 9.5 Fe 84.5 B 6 ) 0.97-x Cr x (TiC) 0.03 ( x = 0.5 and 1) were produced for study. For a Pr nanocomposite with 1% Cr, Hc = 12.5 kOe. However, the energy product was limited to 13.6 MGOe by the remanence value. Rietveld analysis of X-ray spectra showed the ribbons to consist of predominantly hard ( ~ 70 wt%) R 2 Fe 14 B, the soft phase being ( ~ 30 wt%) alpha-Fe. Mossbauer measurements at 300 K are consistent with a reduced hyperfine field for the hard magnetic phase due to the Cr addition. Analysis of transmission electron microscopy images showed the Pr nanocomposite with 1% Cr to have an increased average grain size.</abstract><cop>New York, NY</cop><pub>IEEE</pub><doi>10.1109/TMAG.2008.2002243</doi><tpages>4</tpages></addata></record> |
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| subjects | Chromium alloys Cr additions Cross-disciplinary physics: materials science rheology Exact sciences and technology Grain size Image analysis Iron Magnetic analysis Magnetic field measurement Magnetic properties Magnetism Materials science Minerals MÖssbauer spectroscopy Nanocomposites Nd)-Fe-B Neodymium Other topics in materials science Phase measurement Physics Pr Remanence X-ray diffraction (XRD) |
| title | Effect of Ti-C and Cr Additions on Magnetic Properties of Nanocrystalline (Pr,Nd)-Fe-B Alloys |
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