The phenomenology of multicomponent diffusion studies was carried out in the IN718/BNi-2/AISI 316L joined couple at bonding temperature 1050 °C for bonding time 45 min. This study has been employed for the determination of interdiffusion fluxes, zero-flux planes and chemical potential gradient for multicomponent system of IN718/BNi-2/316L. The chemical composition of phases in the diffusion zone were analyzed by energy-dispersive spectroscopy, and the mobility parameter was extracted from Thermo-Calc software, DICTRA module. Interdiffusion fluxes of individual components, e.g., Ni, Cr, Fe, Si, B, Ti and Nb, were determined directly from the experimental concentration profiles and were examined in the light of diffusional interactions. The calculated flux result revealed that boron diffusion toward IN718 alloy was more than 316L alloy in the presence of other alloying elements. In addition, this observation was evaluated thermodynamically using the chemical potential gradient that was calculated for each component. The chemical potential results showed that the chemical potential gradient of boron in the presence IN718 elements was lower than chemical potential gradient of boron in the presence 316L elements.

在IN718 / BNi-2 / AISI 316L连接对中，在键合温度1050°C下进行了45分钟的键合时间，研究了多组分扩散的现象学。该研究已用于确定IN718 / BNi-2 / 316L多组分体系的互扩散通量，零通量平面和化学势梯度。用能谱分析了扩散区相的化学成分，并从Thermo-Calc软件DICTRA模块中提取了迁移率参数。镍，铬，铁，硅，硼，钛和铌等单个成分的互扩散通量直接从实验浓度曲线中确定，并根据扩散相互作用进行了检验。计算得出的通量结果表明，在存在其他合金元素的情况下，硼向IN718合金的扩散大于316L合金。此外，使用针对每种组分计算出的化学势梯度，对该观察结果进行了热力学评估。化学势结果表明，存在IN718元素时硼的化学势梯度低于存在316L元素时硼的化学势梯度。