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第12期 田建军等:采用石蜡基粘结剂体系制备注射成形S2Co17永磁体 .1377. 胞状显微组织,胞内是2:17相,它是磁体高饱和磁 dependence of coercivity in rare earth cobalt magnets.J Magn 化强度的来源,胞壁是1:5相,它通过钉扎磁畴获得 Magn Mater,2002,242/245:1335 高的内禀矫顽力103];而PIM永磁体没有完整的 [5]Tian JJ.TaoS W.Zhang S G,et al.Study on solvent binding of injection molding parts of Sm(Co.Cu.Fe,Zr):permanent mag- 胞状显微组织,造成磁性能偏低, nets.Powder Metall Ind,2006,16(2):9 4结论 (田建军,陶斯武,张深根,等.Sm(Co,Cu,Fe,Zr):永磁体注 射成形坯溶剂脱脂工艺的研究.粉末治金工业,2006,16(2): 采用石蜡基热塑性粘结剂体系制备PIM烧结 马 [6]Qu X H.Yan HS.Huang B Y.Development of binders for met- Sm2Co17永磁体.根据喂料的流变性能和对磁体碳 al powder injection molding.Powder Metall Technol,1997.15 含量的影响,粘结剂组成(质量比)为PW:LDPE: (1):61 PPSA=7:1:1:1.在氩气和氢气混合气氛下进行 (曲选辉,颜寒松,黄伯云,金属粉末注射成形粘结剂的发展 热脱脂,经烧结、热处理得到永磁体,其磁性能为 粉末治金技术,1997,15(1):61) B.=0.51T,H=168kA·m-1,BHmx= [7]Renk R S.Polymer Rheology.Translated by Song J Q.Beijing: 21.3kJm-3.与传统工艺制备的磁体相比,PIM磁 Defense Industry Press.1983 (伦克RS·聚合物流变学.宋家琪,译,北京:国防工业出版 体退磁曲线的方形度较差,磁性很低,原因是PIM 社,1983) 永磁体碳含量很高(0.33%,质量分数)·较高的碳 [8]Yu T Y.High Polymer Viscoelastic.Shanghai:Shanghai Scien- 含量导致磁体中出现高熔点的非磁性相ZC,造成 tific &Technical Publishers.1986 Zr的有效含量降低,片状相和1:5相体积含量减 (于同隐.高聚合物的粘弹性·上海:上海科学技术出版社, 1986) 少,胞状显微组织和微观结构被破坏,磁性能下降, [9]Tian JJ,Zhang S G.Qu X H,et al.Behavior of residual carbon 采用石蜡基热塑性粘结剂体系很难将磁体的碳含量 in Sm(Co.Fe,Cu,Zr)z permanent magnets.J Alloy Compd, 降至0.1%以下,必须开发新型低碳的粘结剂体系, 2007,440,89 [10]Liu J F,Zhang Y,Dimitrov D.et al.Microstructure and high 参考文献 temperature magnetic properties of Sm (Co.Cu.Fe.Zr):( 6.7-9.1)permanent magnets.JAppl Phys.1999.85(5): [1]Tang W,Zhang Y,Hadjipanayis GC.et al.Microstructure and 2800 magnetic properties of Sm Cow Fe,Cuo.128Zro.02)7.0-J Magn [11]Liu S,Potts G,Doyle G,et al.Effect of value on high tem- Magn Mater.2000,221:268 perature performance of Sm(Co.Fe.Cu.Zr):with :=7.14- [2]Tian J.Qu X.Zhang S.et al.Magnetic properties and mi- 8.10.IEEE Trans Magn,2000,36(5):3297 crostructure of radially oriented Sm(Co.Fe,Cu,Zr):ring mag [12]Zhang Y,Corte-Real M.Hadjipanayis G C.et al.Magnetic nets.Mater Lett.2007,61:5271 hardening studies in sintered Sm(Co,Cu,.Fe.Zr):2:17 high [3]Walmer M S,Chen C H.A new class of Sm-TM magnets for op- temperature magnets-JAppl Phys.2000.87(9):6722 erating temperatures up to 550 degrees celsius.IEEE Trans [13]Schobinger D.Gutfleisch O.Hinz D.et al.High temperature Magm,2000,36(5):3376 magnetic properties of 2:17 Sm-Co magnets.J MagnMagn [4]Tang W.Zhang Y.Gabay A M,et al.Anomalous temperature Mater,2002,242/245:1347胞状显微组织‚胞内是2∶17相‚它是磁体高饱和磁 化强度的来源‚胞壁是1∶5相‚它通过钉扎磁畴获得 高的内禀矫顽力[10-13];而 PIM 永磁体没有完整的 胞状显微组织‚造成磁性能偏低. 4 结论 采用石蜡基热塑性粘结剂体系制备 PIM 烧结 Sm2Co17永磁体.根据喂料的流变性能和对磁体碳 含量的影响‚粘结剂组成(质量比)为PW∶LDPE∶ PP∶SA=7∶1∶1∶1.在氩气和氢气混合气氛下进行 热脱脂‚经烧结、热处理得到永磁体‚其磁性能为 Br= 0∙51T‚ Hcj = 168 kA · m -1‚ BHmax= 21∙3kJ·m -3.与传统工艺制备的磁体相比‚PIM 磁 体退磁曲线的方形度较差‚磁性很低‚原因是 PIM 永磁体碳含量很高(0∙33%‚质量分数).较高的碳 含量导致磁体中出现高熔点的非磁性相 ZrC‚造成 Zr 的有效含量降低‚片状相和1∶5相体积含量减 少‚胞状显微组织和微观结构被破坏‚磁性能下降. 采用石蜡基热塑性粘结剂体系很难将磁体的碳含量 降至0∙1%以下‚必须开发新型低碳的粘结剂体系. 参 考 文 献 [1] Tang W‚Zhang Y‚Hadjipanayis G C‚et al.Microstructure and magnetic properties of Sm (Cobal Fe xCu0∙128Zr0∙02)7∙0. J Magn Magn Mater‚2000‚221:268 [2] Tian J‚Qu X‚Zhang S‚et al.Magnetic properties and mi￾crostructure of radially oriented Sm (Co‚Fe‚Cu‚Zr) z ring mag￾nets.Mater Lett‚2007‚61:5271 [3] Walmer M S‚Chen C H.A new class of Sm-T M magnets for op￾erating temperatures up to 550 degrees celsius. IEEE T rans Magn‚2000‚36(5):3376 [4] Tang W‚Zhang Y‚Gabay A M‚et al.Anomalous temperature dependence of coercivity in rare earth cobalt magnets.J Magn Magn Mater‚2002‚242/245:1335 [5] Tian J J‚Tao S W‚Zhang S G‚et al.Study on solvent binding of injection molding parts of Sm (Co‚Cu‚Fe‚Zr) z permanent mag￾nets.Pow der Metall Ind‚2006‚16(2):9 (田建军‚陶斯武‚张深根‚等.Sm(Co‚Cu‚Fe‚Zr) z 永磁体注 射成形坯溶剂脱脂工艺的研究.粉末冶金工业‚2006‚16(2): 9) [6] Qu X H‚Yan H S‚Huang B Y.Development of binders for met￾al powder injection molding.Pow der Metall Technol‚1997‚15 (1):61 (曲选辉‚颜寒松‚黄伯云.金属粉末注射成形粘结剂的发展. 粉末冶金技术‚1997‚15(1):61) [7] Renk R S.Polymer Rheology.Translated by Song J Q.Beijing: Defense Industry Press‚1983 (伦克 R S.聚合物流变学.宋家琪‚译.北京:国防工业出版 社‚1983) [8] Yu T Y.High Polymer V iscoelastic.Shanghai:Shanghai Scien￾tific & Technical Publishers‚1986 (于同隐.高聚合物的粘弹性.上海:上海科学技术出版社‚ 1986) [9] Tian J J‚Zhang S G‚Qu X H‚et al.Behavior of residual carbon in Sm (Co‚Fe‚Cu‚Zr)z permanent magnets.J Alloy Compd‚ 2007‚440:89 [10] Liu J F‚Zhang Y‚Dimitrov D‚et al.Microstructure and high temperature magnetic properties of Sm (Co‚Cu‚Fe‚Zr) z ( z = 6∙7-9∙1) permanent magnets.J Appl Phys‚1999‚85(5): 2800 [11] Liu S‚Potts G‚Doyle G‚et al.Effect of z value on high tem￾perature performance of Sm(Co‚Fe‚Cu‚Zr) z with z =7∙14- 8∙10.IEEE T rans Magn‚2000‚36(5):3297 [12] Zhang Y‚Corte-Real M‚Hadjipanayis G C‚et al.Magnetic hardening studies in sintered Sm (Co‚Cu x‚Fe‚Zr) z 2∶17 high temperature magnets.J Appl Phys‚2000‚87(9):6722 [13] Schobinger D‚Gutfleisch O‚Hinz D‚et al.High temperature magnetic properties of 2∶17 Sm-Co magnets. J Magn Magn Mater‚2002‚242/245:1347 第12期 田建军等: 采用石蜡基粘结剂体系制备注射成形 Sm2Co17永磁体 ·1377·
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