The liquid structure of iron-rich Fe-Si alloys (the silicon content is 22, 32, 34, 50 at%, respectively) was studied by high temperature θ-θ diffractometer at 1 550 ℃. The results show that the coordination number of atoms decreases with increasing silicon content. A visible pre-peak was observed in the structure factor of Fe-Si alloys, especially for the liquid Fe78Si22 and Fe68Si32 alloys. The special study was given on the liquid structure of Fe68Si32 alloy at temperature from 1 250 to 1 550 ℃. A distinct pre-peak was found at scattering vector Q=15.5 nm-1 in the structure factor. That means there are ordered D03 structure clusters in the liquid Fe68Si32 alloy. The correlation between silicon atoms in the Fe3Si compounds leads to the pre-peak in the structure factor.
参考文献
| [1] | IIDA T;Guthrie R I L.The Properties of Liquid Metals[M].Oxford:Clarendon Press,1993 |
| [2] | Waseda Y;Tokuda M;Ohtani M .The Structure of Molten Feand Fe-C Alloys by X-Ray Diffraction[J].Tetsu To Hagane-Journal of The Iron and Steel Institute of Japan,1975,61(01):54-70. |
| [3] | Waseda Y;Shiraishi Y .The Structure of Molten Fe-P and Fe-Si Alloys[J].Tetsu To Hagane-Journal of The Iron and Steel Institute of Japan,1977,63(09):1476-1483. |
| [4] | Waseda Y.The Structure of Non-Crystalline Materials[M].New York:McGraw-Hill,1980 |
| [5] | Vatolin N A;Pastuhov E A.Spec Rep No.19 The Forth Ja-pan-USSR Joint Symposium on Physical Chemistry of Metal-lurgical Processes[M].Tokyo:ISIJ,1973 |
| [6] | KITA Y;Zeze M;Morita Z .Structural Analysis of Molten Fe-Si Alloys by X-Ray Diffraction[J].Transactions of the Iron and Steel Institute of Japan,1982,22:571-576. |
| [7] | Waseda Y;Shinoda K;Sugiyama K et al.High TemperatureX-Ray Diffraction Study of Melt Structure of Silicon[J].Japanese Journal of Applied Physics,1995(34):4124-4128. |
| [8] | Cromer D T;Mann J B .Compton Scattering Factors forSpherically Symmetric Free Atoms[J].Journal of Chemical Physics,1967,47(06):1892-1893. |
| [9] | Hoyer W;Jodicke R .Short-Range and Medium-Range Orderin Liquid Au-Ge Alloys[J].Journal of Non-Crystalline Solids,1995,192-193:102-105. |
| [10] | Elliott S R .Medium-Range Structural Order in CovalentAmorphous Solids[J].Nature,1991,354:445-452. |
| [11] | Hultgren R;Desai P D;Hawkins D T.Selected Valueof Thermodynamic Properties of Binary Alloys[M].Ohio:Metals Park,1973 |
| [12] | Steeb S;Hezel R .Molten Structure of Ag-Mg Alloys[J].Zeitschrift fur Metallkunde,1966,57(05):374-378. |
| [13] | Massalski T B;Okamoto H;Subramanian P R.BinaryAlloy Phase Diagrams[M].Ohio:Materials Park,1992 |
| [14] | Villars P;Calvert L D.Pearson′s Handbook of Crystal-lographic Data for Intermetallic Phases[M].Ohio:The Ma-terials Information Society,1991 |
| [15] | WANG Huanrong,YE Yifu,WANG Weimin,QIN Jingyu.Atomic model of liquid pure Fe[J].科学通报(英文版),2001(04):300-303. |
| [16] | KITA Y;Van Zytveld J B;Morita Z et al.Covalency in Liq-uid Si and Liquid Transition-Metal-Si Alloys: X-Ray Diffrac-tion Studies[J].Journal of Physics:Condensed Matter,1994,6(04):811-820. |
| [17] | Sokolov A P;Kisliuk A;Soltwisch M et al.Medium-RangeOrder in Glasses: Comparison of Raman and Diffraction Mea-surements[J].Physical Review Letters,1992,69(10):1540-1543. |
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