The tracer diffusion of transition metals in duplex oxide grown on a T316 stainless steel
The tracer diffusion of transition metals in duplex oxide grown on a T316 stainless steel
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T316 不锈钢上生长的双相氧化物中过渡金属的示踪扩散
DOI：
10.1016/0010-938x(81)90080-9
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发表时间：
1981
影响因子：
8.3
通讯作者：
A. Smith
中科院分区：
文献类型：
--
作者：
A. Smith
用连续切片法研究了Fe_（59）Cr_（51）和Mn_（54）在655-1000°C温度范围内在316不锈钢真空退火后生长的双层氧化膜中的示踪扩散。Fe示踪剂浓度下降，增加渗透到氧化物在所有温度下。使用有限差分法在氧化层和下面的合金中的扩散系数进行了评估。如先前在1000°C下所发现的，在整个温度范围内，Cr和Mn示踪剂浓度随着外部氧化物中的距离而增加。然而，在内部氧化物和金属中的轮廓是正常的。这三种示踪剂在内部和外部氧化物中的扩散活化能在30-36 kcal mol −1范围内，与磁铁矿和铁氧体尖晶石中阳离子空位迁移的活化能一致。
The tracer diffusion of Fe59Cr51and Mn54in duplex scales grown on vacuum-annealed 316 stainless steel was studied in the temperature range 655–1000°C using the serial sectioning technique. The Fe tracer concentration decreased with increasing penetration into the oxides at all temperatures. Diffusion coefficients in the oxide layers and the underlying alloy were evaluated using finite difference methods. As found previously at 1000°C, the Cr and Mn tracer concentrations increased with distance in the outer oxide over the whole temperature range. However, the profiles were normal in the inner oxide and metal. The activation energies of diffusion of the three tracers in both inner and outer oxide were in the range 30–36 kcal mole−1, being consistent with the activation energy of cation vacancy migration in magnetite and ferrite spinels.