Helium desorption behavior and growth mechanism of helium bubbles in FeCrNi film
Helium desorption behavior and growth mechanism of helium bubbles in FeCrNi film
复制标题
FeCrNi薄膜中氦解吸行为及氦气泡生长机制
DOI：
10.1016/j.nme.2019.100710
复制
发表时间：
2019
影响因子：
2.6
通讯作者：
Liu C. S.
中科院分区：
文献类型：
--
作者：
Wang L.;Wang X. P.;Zhang L. F.;Gao Y. X.;Liu R.;Gao R.;Jiang Y.;Hao T.;Zhang T.;Fang Q. F.;Liu C. S.
采用射频磁控溅射法制备了FeCrNi薄膜，利用热脱附谱（TDS）结合显微结构分析，研究了不同退火处理条件下FeCrNi薄膜中氦的脱附行为、氦泡的生长过程和演化机制。在TDS谱中观察到三个不同的He脱附峰，这可能与FeCrNi薄膜中不同尺寸的He空位团簇--近表面区域间隙He原子的释放有关。TEM分析表明，氦泡可以均匀地分布在FeCrNi纳米晶薄膜中。在不同温度下的退火处理下，随着退火温度的升高，FeCrNi薄膜中氦泡的尺寸明显增大，对应于氦泡数密度的显著降低，氦泡的生长机制可能是迁移合并机制.
He-charged FeCrNi films were prepared by radio frequency (RF) magnetron sputtering technique, and helium desorption behavior, growth process and evolution mechanism of helium bubbles in FeCrNi film were studied by thermal desorption spectroscopy (TDS) spectra combined with microstructure analysis under different annealing treatments. Three different He desorption peaks were observed in TDS spectra, which can be related to the release of interstitial helium atoms from the near-surface regions, helium-vacancy clusters with different sizes in FeCrNi film. TEM analysis showed that helium bubbles can be uniformly distributed in He-charged FeCrNi nanocrystalline films. Under annealing treatments at different temperatures, the size of helium bubbles obviously increases with increasing annealing temperature, corresponding to the significantly decrease in the number density of helium bubbles in FeCrNi films, and the growth mechanism of helium bubbles was suggested to originate from the migration and coalescence (MC) mechanism.