研究了在磁场梯度约为25 T/m条件下不同磁场强度以及磁场强度约为5 T时不同磁场梯度对半熔态Al-18Si合金凝固过程中初晶硅迁移行为的影响.结果表明:当磁场强度大于2.3 T时,初晶硅开始迁移,但没有偏聚;当磁场强度达到6.6 T时,初晶硅发生迁移并聚集,产生明显的聚集层;且随着磁场强度的进一步增大(磁场强度分别增至7.7和9.9 T),聚集层的厚度基本保持不变;当磁场强度不变,随着磁场梯度的增大,初晶硅的偏聚量增加,晶粒尺寸变小.并对磁场强度影响初晶硅迁移的机制进行了探讨.
参考文献
| [1] | B. F. O. Costa;G. Le Caer;B. Luyssaert .Mossbauer studies of phase separation in nanocrystalline Fe_(0.55-x)Cr_(0.45)Sn_x alloys prepared by mechanical alloying[J].Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics,2003(1/2):36-46. |
| [2] | Yokoyama K.;Oka T.;Okada H.;Noto K. .High gradient magnetic separation using superconducting bulk magnets[J].Physica, C. Superconductivity and its applications,2003(Pt.1):739-744. |
| [3] | Hamai M.;Tagami M.;Awaji S.;Watanabe K.;Motokawa M.;Mogi I. .Crystal growth of ammonium chloride in magnetic levitation conditions[J].Journal of Crystal Growth,2000(4):1013-1017. |
| [4] | Takahashi K;Umeki C;Mogi I;Koyama K;Awaji S;Motokawa M;Watanabe K .Magnetic orientation of paraffin in a magnetic levitation furnace[J].Physica, B. Condensed Matter,2004(0):277-281. |
| [5] | Motokawa M.;Sato T.;Mogi I.;Awaji S.;Watanabe K.;Kitamura N.;Makihara M.;Hamai M. .Magnetic levitation experiments in Tohoku University[J].Physica, B. Condensed Matter,2001(0):729-735. |
| [6] | M. Motokawa;M. Hamai;T. Sato;I. Mogi;S. Awaji;K. Watanabe;N. Kitamura;M. Makihara .Crystal growth and materials processing in the magnetic levitation condition[J].Journal of Magnetism and Magnetic Materials,2001(2):2090-2093. |
| [7] | Reddy S.;Sun LP.;Zborowski M.;Chalmers JJ.;Moore LR. .DETERMINATION OF THE MAGNETIC SUSCEPTIBILITY OF LABELED PARTICLES BY VIDEO IMAGING[J].Chemical Engineering Science,1996(6):947-956. |
| [8] | 王晖,任忠鸣,邓康,徐匡迪.磁场对Bi-Mn合金两相区中MnBi相凝固组织的影响[J].金属学报,2002(01):41-46. |
| [9] | Legrand BA.;de la Bathie RP.;Toumier R.;Chateigner D. .Orientation of samarium-cobalt compounds by solidification in a magnetic field[J].Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics,1998(0):660-664. |
| [10] | Tsubasa SUGIYAMA;Masahiro TAHASHI;Kensuke SASSA .The Control of Crystal Orientation in Non-magnetic Metals by Imposition of a High Magnetic Field[J].ISIJ International,2003(6):855-861. |
| [11] | Shuqin Li;Cunyou Wu;Kensuke Sassa .The control of crystal orientation in ceramics by imposition of a high magnetic field[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,2006(1/2):227-231. |
| [12] | Sassa K;Waki N;Asai S.Elimination of inclusions in a molten metal by using a high magnetic field[A].San Francisco:TMS,2000:565-568. |
| [13] | 冉新天,任忠鸣,邓康,李喜,李伟轩.Al-18%Si合金在梯度强磁场中凝固时初生硅的行为[J].中国有色金属学报,2005(01):72-78. |
| [14] | 王强,王春江,庞雪君,赫冀成.利用强磁场控制过共晶铝硅合金的凝固组织[J].材料研究学报,2004(06):568-576. |
| [15] | 王春江,王强,王亚勤,黄剑,赫冀成.强磁场对Al-Si合金凝固组织中硅分布的影响[J].物理学报,2006(02):648-654. |
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