The glass-forming ability (GFA)of Nd70-xFe20Al10Yx and Nd60-xFe30Al10Yx (0≤ x≤15) alloys produced by Cu mold casting was investigated. Except Y=5 at. Pct, bulk amorphous Nd70-xFe20Al10Yx alloys up to 2 mm in diameter were obtained. The GFA for Nd60-xFe30Al10Yx alloys, however, was found to decrease with increase of Y due to the increasing compositional deviation from the original eutectic point of Nd60Fe30Al10 alloy. The Nd60Fe20Al10Y10 and Nd60Fe30Al10 alloy exhibit the largest GFA and can be cast into bulk amorphous cylindrical specimens of 3 mm in diameter. The melting temperature or/and the reduced crystallization temperature is closely related to the GFA of Y-containing alloys. The bulk amorphous cylinder for the Nd55Fe20Al10Y15 alloy shows a distinct glass transition temperature and a wide supercooled liquid region before crystallization. The crystallization temperature, Tg, and the supercooled liquid region, △Tx, are 776 K and 58 K, respectively. The GFA and thermal stability of the Nd-Fe-Al-Y alloys were discussed.
参考文献
[1] | H S Chen .[J].Acta Materialia,1974,22:1505. |
[2] | A Inoue;T Zhang;T Masumoto .[J].Materials Transactions,1989,30:965. |
[3] | A Inoue;K Ohtera;K Kita;T Masumoto .[J].Japanese Journal of Applied Physics,1988,27:2248. |
[4] | A Inoue;T Zhang;T Masumoto .[J].Materials Transactions,1990,31:177. |
[5] | A Peker;W L Johnson .[J].Applied Physics Letters,1993,63:2342. |
[6] | A Inoue;T Shibata;T Zhang .[J].Materials Transactions,1995,36:1420. |
[7] | A Inoue;N Nishiyama;T Matsuda .[J].Materials Transactions,1996,37:181. |
[8] | R B Schwarz;Y He .[J].Materials Science Forum,1997,235-238:231. |
[9] | T Zhang;A Inoue .[J].Materials Transactions,1998,39:1001. |
[10] | T Zhang;A Inoue .[J].Materials Transactions,1999,40:301. |
[11] | Y He;C E Price;S J Poon .[J].Philosophical Magazine Letters,1994,70:371. |
[12] | A Inoue;T Zhang;W Zhang;A Takeuchi .[J].Materials Transactions,1996,37:99. |
[13] | A Inoue;T Zhang;A Takeuchi;W Zhang .[J].Materials Transactions,1996,37:636. |
[14] | G J Fan;W LOster;S Roth;J Echert .[J].Acta Materialia,2000,48:3823. |
[15] | Z P Lu;Y Li;S C Ng;Y P Feng.[A].Mater Res Soc,1999:205-210. |
[16] | A Inoue;N Nishiyama;H Kimura .[J].Materials Transactions,1997,38:179. |
[17] | T Zhang;A Inoue;T Masumoto .[J].MATERIALS TRANSACTIONS,1991,32:1005. |
[18] | A Inoue;D Kawase;A P Tsai;T Zhang and T Masumoto .[J].Materials Science and Engineering,1994,A178:255. |
[19] | A Inoue.ulk Amorphous Alloys[M].Trans Technol Publication Ltd,Switzerland,1998:38. |
[20] | M Ohnuma;S Linderoth;N Pryds;M Eldrup and A S Pedersen.[A].Material Research Society,1999:119. |
[21] | A Inoue;T Nakamura;T Sugita;T Zhang and T Masumoto .[J].Materials Transactions,1993,34:351. |
[22] | A. Inoue;A. Takeuchi .Ferromagnetic bulk amorphous alloys[J].Metallurgical and Materials Transactions, A. Physical Metallurgy and Materials Science,1998(7):1779-1794. |
[23] | W L Johnson .[J].Materials Science Forum,1996,225-227:35. |
[24] | A Inoue .[J].Materials Science and Engineering,1997,A226-228:357. |
[25] | T Egami;Y Waseda .[J].Journal of Non-Crystalline Solids,1984,64:113. |
[26] | A R Miedema;R Boom;F R De Boer .[J].Journal of the Less-Common Metals,1975,41:283. |
[27] | A R Miedema;A K Niessen .[J].Calphad-Computer Coupling of Phase Diagrams and Thermochemistry,1983,7:27. |
[28] | Z. P. Lu;H. Tan;Y. Li;S. C. Ng .The correlation between reduced glass transition temperature and glass forming ability of bulk metallic glasses[J].Scripta materialia,2000(7):667-673. |
[29] | Z P Lu;Y Li;S C Ng .[J].Journal of Non-Crystalline Solids,2000,270:103. |
[30] | Y. Li .A Relationship between Glass-Forming Ability and Reduced Glass Transition Temperature near Eutectic Composition[J].Materials transactions,2001(4):556-561. |
[31] | W L Johnson .[J].MRS Bulletin,1999,24:42. |
[32] | Y. Li;S. C. Ng;C. K. Ong;H. H. Hng;T. T. Goh .GLASS FORMING ABILITY OF BULK GLASS FORMING ALLOYS[J].Scripta materialia,1997(7):783-787. |
[33] | F Q Guo;S Enouf;G Shiflet;J Poon .[J].Materials Transactions,2000,41:1406. |
[34] | D M Turnbull .[J].Contemporary Physics,1969,10:473. |
[35] | W J Boettinger.[A].Elsevier Science Publisher,Holland,1982:99. |
[36] | J W Christian.The Theory of Transformation in Metals and Alloys[M].Pergamon Press,Oxford,UK,1975:418. |
[37] | D M Herlach .[J].Materials Science and Engineering,1994,R12:177. |
- 下载量()
- 访问量()
- 您的评分:
-
10%
-
20%
-
30%
-
40%
-
50%