Crystallization of amorphous Fe- P- C alloys
Crystallization of amorphous Fe- P- C alloys
复制标题
非晶 Fe-P-C 合金的结晶
DOI：
10.1007/bf02658295
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发表时间：
1979
期刊：
影响因子：
--
通讯作者：
R. Maddin
中科院分区：
文献类型：
--
作者：
H. Yeh;R. Maddin
采用差示扫描量热法(DSC)、X射线衍射仪(XRD)和透射电子显微镜(TEM)研究了非晶Fe-P-C合金从非晶态到晶态的转变。成分包括富含铁和磷的合金以及成分接近共晶成分的合金。 Fe-P-C合金的结晶过程如下：对于富铁合金，首先析出bcc α Fe；对于富磷合金，首先析出Fe2P和碳化铁；对于共晶线附近的合金，虽然观察到一些α Fe 或Fe2P 加碳化铁晶体，但共晶反应占主导地位。相变的成分依赖性可以通过自由能模型借助相图成功地解释。根据 DSC 和 TEM 结果，根据 Avrami 的再结晶理论，富 Fe 合金中 α Fe 析出物的成核率随时间而降低。
The transformation of amorphous Fe-P-C alloys from the amorphous state to crystalline state was studied by differential scanning calorimetry (DSC), X-ray diffractometry (XRD) and transmission electron microscopy (TEM). Compositions included iron and phosphorus rich alloys and alloys with compositions near the eutectic composition. The crystallization of Fe-P-C alloys proceeded by the following processes: for the iron rich alloy, bcc α Fe precipitated first; for the phosphorus rich alloy, Fe2P and iron carbide precipitated first; for the alloys near the eutectic line, the eutectic reactions dominated, although some α Fe or Fe2P plus iron carbide crystals were observed. The composition dependence of the transformation can be explained successfully by a free energy model with the help of the phase diagram. From DSC and TEM results, the nucleation rate of the α Fe precipitate decreased with time in the Fe rich alloys according to the recrystallization theory of Avrami.