摘要
研究了氮原子在Sm_2Fe_(17)合金中的扩散行为,测定了扩散温度、时间与样品平均氮含量的关系,以及氮原子在样品中的分布;计算了氮原子在Sm_2Fe_(17)合金中的扩散频率因子D_0和扩散激活能Q,运用扩散Fick第二定律计算了氮原子在Sm_2Fe_(17)粉末颗粒内部的分布及其与扩散温度、扩散时间、颗粒尺寸之间的关系.理论计算与实验结果一致.
The diffusion behaviour of N atoms in Sm2Fe17 alloys has been studied. The relationship between the diffusion temperature, the diffusion time with average coneentration of N in samples and the distribution of N concentration in powder particle have been measured. The frequency factor D0 and activation energy Q for N atoms diffusion in Sm2Fe17 particle have been calculated. Using Fick second diffusion law the distribution of N concentration in Sm1Fe17 particles and the relationship between the distribution of N concentration with diffusion temperature, diffusion time and particle size are calculated. The calculated results are consistent with experimental results.
出处
《金属学报》
SCIE
EI
CAS
CSCD
北大核心
1996年第8期877-883,共7页
Acta Metallurgica Sinica
关键词
气-固相反应
氮原子
扩散
永磁合金
Sm_2Fe_(17)N_y magnets, gas-solid phase reaction, nitrogen atom, diffusion