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我们曾用热电势(TEP)方法研究了非晶合金Fe_(83)B_(14)Si_(1.5)C_(1.5)的结构弛予和晶化动力学[1]。结果表明,试样在448—723K温度范围经不同时间恒温保持后,室温TEP值随保持时间的变化可分为三个阶段:第一阶段相当于结构弛予,TEP值略有下降;第二阶段晶化开始,有a-Fe析出,TEP值明显上升;在TEP值超过极大值以后又重新明显下降(第三阶段),此阶段有Fe_3B的析出,并且随着时间增长,还出现Fe_2B,其量也随着时间而增多。用TEP方法研究Fe_(40)Ni_(40)P_(14)B_6的晶化动力学过程也是很有意义的。一方面,对该合金虽然进行过许多研究[2-8],但尚未见到热电势研究的报导,可以将TEP法研究晶化动力学的结果与其他物理方法的结果进行比较。另一方面,也可以将Fe_(40)Ni_(40)P_(14)B_6的研究结果与Fe_(83)B_(14)Si_(1.5)C_(1.5)的结果进行比较,从而加深对非晶合金晶化过程规律的理解。
We have studied the structure relaxation and crystallization kinetics of amorphous Fe_ (83) B_ (14) Si_ (1.5) C_ (1.5) by the thermoelectric power (TEP) method. The results show that after the sample is kept at constant temperature in the temperature range of 448-723K for different time, the TEP value at room temperature can be divided into three stages according to the change of holding time: the first stage corresponds to the relaxation of structure and the TEP decreases slightly; At the beginning of the stage of crystallization, a-Fe precipitates and the TEP value rises obviously. After the TEP value exceeds the maximum value, it drops again obviously (stage III). Fe_3B precipitates at this stage, and as time goes on, Fe_2B The amount has also increased over time. It is also significant to study the crystallization kinetics of Fe_ (40) Ni_ (40) P_ (14) B_6 by TEP method. On the one hand, although many studies have been done on the alloy [2-8], no reports of thermoelectric potentials have been reported yet. The results of the TEP method for studying crystallization kinetics can be compared with those of other physical methods. On the other hand, the results of Fe_ (40) Ni_ (40) P_ (14) B_6 can also be compared with the results of Fe_ (83) B_ (14) Si_ (1.5) C_ (1.5) Understanding of the rules of the alloy crystallization process.