Effect of Static Magnetic Field on Nucleation and Growth Orientation of Fe Atomic
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摘要: 采用边—边匹配计算模型和电子背散射衍射（EBSD）技术，从晶体结构变化的角度研究了磁场Fe形核生长取向的影响。研究表明，无论有无磁场，在FexO→Fe转变过程，浮氏体与α-Fe的最优位向关系是[010]//[110]&（200）//（110），在浮氏体的{100}晶面优先析出α-Fe。B=1 T稳恒磁场没有改变α-Fe在浮氏体表面的形核位置，但对α-Fe的生长取向产生了影响，使其由<100>方向优先生长逐渐向<100>、<101>和<111>方向偏转。Abstract: In this paper,the effect of static magnetic field on nucleation and growth orientation of Fe atomic was researched from the perspective of crystal structure by the edge-edge matching model and electron backscatter diffraction（EBSD）technique.It is found out that the optimal orientation relation between FexO and Fe is[010]//[110]＆（200）//（110） independent on magnetic field.during the conversion of FexO→Fe,and FexO preferentially precipitates α-Fe crystal nucleus on {100} crystal plane both under the action of magnetic field and conventional metallurgical conditions.A constant magnetic field（B=1 T） does not change the nucleation position of α-Fe on the wustite surface,but it has an impact on the growth orientation of α-Fe,causing it to deflect gradually from the preferential ＜100＞ direction to ＜100＞,＜101＞ and ＜111＞ directions.
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Key words:
- iron making /
- wustite /
- reduction /
- α-Fe /
- EBSD /
- the edge-edge matching model /
- growth orientation
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