研究了超短脉冲电流处理对快凝Al92.3Fe430.7Si1.7Nd1.0纳米晶合金薄带相稳定性的影响,并与等温时效处理结果进行了比较,基体Al晶粒尺寸和析出相颗粒尺寸减小,亚稳相向稳定相转变速度加快,相转变温度降低约100℃;理论分析表明:外场使相转变激活能、临界核心半径和形核功下降,从而提高形核率,并对新相长大有促进作用.
参考文献
| [1] | Misra A K .A novel solidification technique of metals and alloys: under the influence of applied potential[J].Metallurgical and Materials Transactions A:Physical Metallurgy and Materials Science,1985,16:1354-1355. |
| [2] | Nakada M;Shiohara Y;Flemings M C .Modification of solidification structures by pulse electric discharging[J].ISIJ International,1990,30:27-33. |
| [3] | Barnak J P;Sprecher A F;Conrad H .Colony (grain) size reduction in eutectic Pb-Sn castings by electropulsing[J].Scripta Metallurgica et Materialia,1995,32(06):879-884. |
| [4] | Jagielinski T .Flash annealing of amorphous alloys[J].IEEE Transactions on Magnetics,1983,19(05):1925-1927. |
| [5] | ARia P;Baricco M;Tiberto P et al.Kinetics of the amorphous-to-nanocrystalline transformation in Fe73.5 Cu1 Nb3Si13.5 B9[J].Journal of Applied Physics,1993,74(05):3137-3143. |
| [6] | Lai Z H;Conrad H;Chao Y S et al.Effect of electropulsing on the microstructure and properties of iron-based amorphous alloys[J].Scripta Metallurgica et Materialia,1989,23:305-310. |
| [7] | Chao Y S;Lai Z H;He K Y et al.Microstructural recaxztion of amorphous alloy Fe79Si7B14 during electropulsing[J].Materials Science and Engineering,1994,181-182:982-985. |
| [8] | Lai ZH.;Conrad H.;Chu K.;Chao YS. .HYPERFINE STRUCTURE CHANGES IN IRON-BASE AMORPHOUS ALLOYS PRODUCED BY HIGH CURRENT DENSITY ELECTROPULSING[J].Journal of Materials Research,1995(4):900-906. |
| [9] | 贾威,邓江宁,张彤,曾梅光.快速凝固AlFeVSiNd纳米合金薄带时效过程[J].东北大学学报(自然科学版),2001(04):454-456. |
| [10] | 冯端.金属物理学-相变.第二卷[M].北京:科学出版社,1990:118. |
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