论文部分内容阅读
用差热分析(DTA),结合X射线衍射(XRD)研究了Sm -Fe-Si-C非晶态合金的晶化动力学。结果表明:温度低于900oC时,该合金的晶化相为α -Fe(Si)固溶体和Sm2(Fe,Si)17Cx 。α -Fe(Si)相的晶化表观激活能为431.51kJ/mol,Sm2(Fe,Si)17Cx 相的晶化表观激活能为514.43kJ/mol。两相在晶化初期激活能变化不大,当α -Fe(Si)相的体积分数大于70 %,Sm2(Fe,Si)17Cx 相的体积分数大于50 %时,它们的晶化激活能开始减小。
The crystallization kinetics of Sm-Fe-Si-C amorphous alloy was investigated by differential thermal analysis (DTA) and X-ray diffraction (XRD). The results show that the α - Fe (Si) solid solution and Sm2 (Fe, Si) 17Cx are the main phase of the alloy when the temperature is below 900 ℃. The apparent activation energy of α-Fe (Si) phase is 431.51kJ / mol, and the apparent activation energy of Sm2 (Fe, Si) 17Cx phase is 514.43kJ / mol. When the volume fraction ofα-Fe (Si) phase is more than 70% and the volume fraction of Sm2 (Fe, Si) 17Cx phase is more than 50%, the activation energy of two phases begins to change little at the initial stage of crystallization. Decrease