稀释Fe-N合金在200-480K温区的磁弛豫谱研究

稀释Fe-N合金在200-480K温区的磁弛豫谱研究 AN INVESTIGATION OF MAGNETIC RELAXATION SPECTRUM OF A DILUTE Fe-N ALLOY IN 200-480K 丁棣华 first-author 吴进 周如松 对稀释Fe-N合金试样的磁后效测量表明,200—480K温区的磁弛豫谱由下列弛豫峰组成:（1）,由N在Fe基体中的Snoek效应引起的Richter峰位于250K附近;（2）,亚稳相Fe N 的相变引起的一对正负不可逆结构弛豫峰位于350—450K之间;（3）,由处于Fe N 表面附近的N原子的可逆扩散引起的一个宽峰位于350—480K之间; （4）位错和N原子的Snoek-Koster弛豫出现在430K附近。Richter峰和磁冷加工峰的弛豫参数由计算机拟合确定。 Magnetic after-effect measurements were made on dilute Fe-N alloy in the temperature range of 200—480K by means of a device of disaccommodation of the initial permeability. The results show that the megnetic relaxation spectrum consists of the following relaxation peaks: （1）, a peak occurring at ～250K, which is the Richter relaxation peak corresponding to the Shock effect of N in Fe-matrix; （2）, a pair of positive and negtive peaks in the temperature range 350—450K, which are the irreversible structural relaxation due to the precipitation and re-dissolution of the metastable nitride phase Fe 8 N; （3）, a broad peak occurring in the temperature range 400—480K, which is the reversible diffusion relaxation of N interstitial being bound to the surfaces of the precipitates; （4）a magnetic cold-work peak occurring at about 430K, which was obtained in an appropriate way. The activation parameters of the Richter peak and the magnetic cold-work peak were determined. 中国科学院科学基金 1986-03-01 2021-04-01 3