采用差热分析及凝固组织研究Nd9Fe85?xTi4C2Bx(x=10,12)合金熔体过热度对其过冷度以及凝固组织的影响。结果表明：Nd9Fe85?xTi4C2Bx(x=10,12)合金的过冷度随熔体过热度的增大而显著增大，且每种合金均出现两个对应于平均过冷度急剧增大的临界过热度。两个平均过冷度转折点的存在与过热熔体中的结构转变有关，这最终导致凝固组织中非晶相体积分数的增加。
The effectsof melt overheating degree on the undercooling degree and resultant solidification structures of Nd9Fe85?xTi4C2Bx(x=10, 12) glass-forming alloyswerestudied by differential thermal analysis combining with solidification structure analysis. The results indicate that the undercooling degree of Nd9Fe85?xTi4C2Bx(x=10, 12) alloys significantly increaseswith the rise of melt overheating degree, and two overheating degree thresholds corresponding to the drastic increase of the mean undercooling degree are found for each of the alloys. The existence of two turning points of the mean undercooling degreescan be linked to the structure transitions inside the overheated melts, which result in the evident increase of volume fraction of amorphous phasein the solidified structures.
参考文献
| [1] | Chang HW;Shih MF;Chang CW;Hsieh CC;Fang YK;Chang WC;Sun AC.Magnetic properties and microstructure of directly quenched Nd9.5Fe75.5-xMxB15 (M=Mo, Nb, Ta, Ti, V, and Zr; x=0-4) bulk magnets[J].Journal of Applied Physics,20087 Pt.3(7 Pt.3):E7105-1-E7105-3-0. |
| [2] | H.W. Chang;M.F. Shih;C.C. Hsieh.Development of bulk Nd_(9.5)Fe_(75.5-x)M_xB_(15) (M = Mo, Nb, Ta, Ti, and Zr; x = 0-4) magnets by direct casting method[J].Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics,20091/2(1/2):143-146. |
| [3] | Chang, H.W.;Hsieh, C.C.;Gan, J.Y.;Cheng, Y.T.;Shih, M.F.;Chang, W.C..Alloying effect on the magnetic properties of RFeB-type bulk magnets[J].Journal of Physics, D. Applied Physics: A Europhysics Journal,20116(6):064002-1-064002-10. |
| [4] | C. Wang;J.J. Chen;Y. Li.Magnetic properties, microstructure and corrosion behavior of Nd_(10)Y_1Fe_(85_x)Nb_(3.5)Ti_(o.5)B_x (x = 14-22) and Nd_(10)Y_1Fe_(69)Nb_(3.5)M_(o.5)B_(16) (M = Ti, Zr, Cr,Mo) bulk nanocrystalline magnets[J].Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics,2013:16-21. |
| [5] | Liu, Z.;Hsieh, C.C.;Chen, R.J.;Lin, W.C.;Chang, H.W.;Chang, W.C.;Yan, A.R..Magnetic properties, phase and microstructure of direct cast Nd_(9.5)Fe_(bal.)Co_(10)MB_(15) rod magnets[J].Journal of Magnetism and Magnetic Materials,20131(1):108-111. |
| [6] | H.W. Chang;M.F. Shih;C.C. Hsleh.Magnetic property enhancement of directly quenched Nd-Fe-B bulk magnets with Ti substitution[J].Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics,20102(2):499-503. |
| [7] | 姜小丽;蒋远霞;潘晶;刘新才.铜模吸铸Nd9Fe83-xTi4C4Bx（x=10～15）合金组织演化和磁性能的研究[J].中国稀土学报,2014(3):316-321. |
| [8] | Sheng, H.-c.;Zeng, X.-r.;Qian, H.-x.;Fu, D.-j..Effect of melt treatment on the microstructure and magnetic properties of Nd_2Fe_(14)B/α-Fe nanocomposites[J].Journal of Non-Crystalline Solids: A Journal Devoted to Oxide, Halide, Chalcogenide and Metallic Glasses, Amorphous Semiconductors, Non-Crystalline Films, Glass-Ceramics and Glassy Composites,20101(1):19-23. |
| [9] | 寇生中;李娜;郑宝超;赵燕春;薛书微.熔体过热处理对Cu45Zr42Al8Ag5非晶形成能力的影响及块状非晶的DSC研究[J].中国铸造装备与技术,2009(5):30-33. |
| [10] | 邓延波;王学亮;耿浩然;王致明;张蕾.熔体过热处理对铝基合金非晶形成能力的影响[J].特种铸造及有色合金,2009(8):756-759. |
| [11] | 李亮;刘兰俊;崔晓;王知鸷;杨东东;吕雪;祖方遒.熔体结构状态对CU40Zr45Al7Ag8大块非晶合金GFA及其晶化的影响[J].特种铸造及有色合金,2011(6):568-571. |
| [12] | 郭风祥;王薇;杨海龙;秦敬玉;田学雷.富锑铅锑熔体电阻率及黏度的异常变化[J].中国有色金属学报（英文版）,2012(12):3113-3119. |
| [13] | 刘让苏;梁永超;刘海蓉;郑乃超;莫云飞;侯兆阳;周丽丽;彭平.熔体初始温度对液态Mg7Zn3合金凝固过程中微观结构非线性影响的模拟研究[J].中国有色金属学报（英文版）,2013(4):1052-1060. |
| [14] | Tong HY.;Shi FG..DEPENDENCE OF SUPERCOOLING OF A LIQUID ON ITS OVERHEATING[J].The Journal of Chemical Physics,199719(19):7964-7966. |
| [15] | S. Mukherjee;Z. Zhou;J. Schroers;W. L. Johnson;W. K. Rhim.Overheating threshold and its effect on time-temperature-transformation diagrams of zirconium based bulk metallic glasses[J].Applied physics letters,200424(24):5010-5012. |
| [16] | 陈光;颜银标;崔鹏;俞建威;李金山;傅恒志.熔体过热对Sb-Bi合金凝固组织的影响[J].材料科学与工艺,2001(2):113-116. |
| [17] | X.J. Liu;X.D. Hui;G.L. Chen.Thermodynamic calculation and experimental investigation of glass formation in Zr-Ni-Ti alloy system[J].Intermetallics,20082(2):262-266. |
| [18] | M. Calvo-Dahlborg;P. S. Popel;V. E. Sidorov.Structure and properties of some glass-forming liquid alloys[J].The European physical journal, B. Condensed matter physics,20004(4):639-648. |
| [19] | O. Filip;R. Hermann;L. Schultz.Growth kinetics and precipitation phenomena in undercooled Nd-Fe-B melts with Ti and C additions[J].Journal of Magnetism and Magnetic Materials,20012(2):247-254. |
| [20] | Role of yttrium in glass formation of Fe-based bulk metallic glasses[J].Applied physics letters,200313(13):2581-2583. |
| [21] | J. Zhang;K.Y. Lim;Y.P. Feng.Fe-Nd-B-based hard magnets from bulk amorphous precursor[J].Scripta materialia,200711(11):943-946. |
| [22] | Z. Liu;W.C. Lin;C.W. Shih.Effect of Co addition on the microstructure and magnetic properties of Nd_(9.5)Fe_(bal.)Co_xNb_(2.5)Zr_(0.5)B_(15) (x = 0,10, 20) bulk magnets[J].Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics,2012:28-33. |
| [23] | Akihisa Inoue;Tao Zhang.Bulk Nd-Fe-Al Amorphous Alloys with Hard Magnetic Properties[J].Materials transactions,19962(2):99-108. |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%