利用扫描电子显微镜（SEM）、透射电子显微镜（TEM）和二次离子质谱仪（SIMS）测定高温合金上保护性氧化铝氧化皮中的晶格扩散系数和晶界扩散系数。
Determination of lattice and grain boundary diffusion coefficients in protective alumina scales on high temperature alloys using SEM, TEM and SIMS.
作者信息
Clemens D, Bongartz K, Quadakkers W J, Nickel H, Holzbrecher H, Becker J S
机构信息
Research Centre Jülich GmbH (KFA), Institute for Materials in Energy Systems (IWE 1), P.O. Box 19 13, D-52425, Jülich, Germany.
出版信息
Anal Bioanal Chem. 1995 Oct;353(3-4):267-70. doi: 10.1007/s0021653530267.
Grain and grain boundary diffusion coefficients in alumina scales on FeCrAl-based ODS alloys have been determined. The boundary diffusion-coefficients have been derived by combining gravimetrically determined growth rate data with SEM and TEM analyses of the oxide scale microstructure. The diffusion coefficients determined have been used as input parameters for a computer model describing the oxygen isotope exchange between grain and grain boundary in the alumina scale which forms during a two-stage oxidation using (18)O-tracers. This comparison of the calculated tracer profiles with profiles determined experimentally by SIMS allows the estimation of the lattice diffusion coefficient of oxygen in the alumina scale.
已测定了FeCrAl基氧化物弥散强化（ODS）合金上氧化铝氧化皮中的晶粒和晶界扩散系数。通过将重量法测定的生长速率数据与氧化皮微观结构的扫描电子显微镜（SEM）和透射电子显微镜（TEM）分析相结合，得出了晶界扩散系数。所测定的扩散系数已用作计算机模型的输入参数，该模型描述了在使用（18）O示踪剂的两阶段氧化过程中形成的氧化铝氧化皮中晶粒与晶界之间的氧同位素交换。将计算出的示踪剂分布与通过二次离子质谱（SIMS）实验测定的分布进行比较，可以估算氧化铝氧化皮中氧的晶格扩散系数。
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