采用深过冷及深过冷加水淬的方法,成功地制备了样品直径为16 mm,高为15 mm,组织中晶粒平均尺寸小于120 nm的Fe76B2Si12合金块体纳米材料.理论分析与实际计算结果表明:该合金凝固组织纳米化的主要原因在于,其共晶两相的生长速度小、组织粗化速率小、溶质平衡分配系数低以及具有相对较低的熔化焓;深过冷Fe-B-Si合金块体纳米软磁材料制备的理想条件是:获得超过冷、选择主要由溶质扩散控制生长的共晶合金成分、获得Fe2B(Si)相为完全准球状形态的二次粒化非规则共晶组织.
参考文献
| [1] | 张振忠;宋广生;杨根仓 等.块体金属纳米材料制备进展及展望[J].兵器材料科学与工程,1999,22(03):16-20. |
| [2] | 张振忠;宋广生;杨根仓 等.深过冷Fe-B-Si共晶块体纳米材料的凝固组织特征[J].金属学报,1999,35(07):693-697. |
| [3] | Raghavan V.Phase diagrams of ternary iron alloys part 6A[M].New Delihi:Designed and Produced by Electronic Publishing Center, Green Park Extention,1993 |
| [4] | 张振忠 .Fe-B-Si共晶合金深过冷快速凝固及块体纳米软磁材料制备[D].西北工业大学,2000. |
| [5] | 日本电机株式会社分析中心;浙江大学分析测试中心.X射线衍射手册[M].上海:[s:n],1987 |
| [6] | Yao B.;Ding B.Z. .Effect of high pressure on the preparation of Pd-Si-Cu bulk nanocrystalline material[J].Journal of Materials Research,1996(4):912-916. |
| [7] | TURNBULL D;COHN M H.In modem aspects of vitereous stale[M].London :Butterworth,1960:38-44. |
| [8] | HERLACH D M .Non-equilibrium solidification of undercooled metallic melts[J].Materials Science and Engineering,1994,R12(4-5):177-265. |
| [9] | Battezzati L;GREER A L .The viscosity of liquid metals and alloys[J].Acta Metallurgica Et Materialia,1989,37(07):1791-1799. |
| [10] | Chen H S .Thermodynamic considerations on the formation and stability of metallic glasses[J].Acta Materialia,1974,22:1505-1509. |
| [11] | VOORHEES P W;GLICKSMAN M E .Ostwald ripening during liquid phase sintered-effect of volume friction on coarsening kinetics[J].Metallurgical and Materials Transactions,1984,15:489-497. |
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