Experimental Investigation and Thermodynamic Assessment of Ni-B and Ni-B-C Systems
Experimental Investigation and Thermodynamic Assessment of Ni-B and Ni-B-C Systems
复制标题
Ni-B 和 Ni-B-C 体系的实验研究和热力学评估
DOI：
10.1007/s11669-022-00995-0
复制
发表时间：
2022
影响因子：
1.4
通讯作者：
Ueshima Nobufumi
中科院分区：
文献类型：
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作者：
Oikawa Katsunari;Ueshima Nobufumi
由于镍基耐热合金中含有少量的硼和碳，研究它们的相图和热力学性质对于了解碳和硼的行为是非常必要的。用扩散偶技术和差示扫描量热法测定了Ni-B和Ni-B-C体系中碳和硼在面心立方(Fcc)上的溶解度和液相转变温度。此外，根据前人的研究结果和本研究的实验结果，对Ni-B、Ni-C和Ni-B-C体系进行了热力学评估。液相采用缔合模型，催化裂化相采用复合能量模型。在不引入三元参数的情况下，计算结果与实验数据吻合较好。预测了低温下Ni-B系富镍侧的亚稳两相分离，这可能与Ni-B非晶态合金的相分离或成分调制有关。因此，本模型能较好地再现金属-硼体系的相图。
As nickel-based heat-resistant alloys contain small amount of boron and carbon, it is imperative to study their phase diagrams and thermodynamic properties to understand the behavior of carbon and boron. In this study, the solubilities of carbon and boron at the face-centered cubic (fcc) and liquid phase transition temperatures of Ni–B and Ni–B–C systems were determined using the diffusion couple technique and differential scanning calorimetry. In addition, a thermodynamic assessment of the Ni–B, Ni–C, and Ni–B–C systems was conducted based on the results of previous studies and experiments of the current study. An associate model was employed for the liquid phase, and a compound energy model was employed for the fcc phase. The calculated results agreed well with the experimental data without the introduction of ternary parameters. Metastable two-phase separation in the liquid phase was predicted on nickel-rich side in the Ni–B system at low temperature, which can be related to the phase separation or compositional modulation of Ni–B amorphous alloys. Thus, the present model can reproduce the phase diagram of metal-boron systems.