Supersaturated solid–solutions in a W–Cr alloy system were fabricated by conventional milling and plasma milling. The different extension mechanisms of the solid solubility that were created by ball milling with and without discharge plasma were studied. The solid–solubility of Cr in W for the P-milling W–Cr alloy system was higher, which indicates that plasma milling promotes the formation of W(Cr) solid–solution more easily than conventional milling. According to Miedema’s model, in the W–Cr alloy system, the free-energy change to form a W(Cr) solid solution by plasma milling is reduced compared with conventional milling because of the heating effect of the discharge plasma. Therefore, a higher stored energy in the grain boundaries and dislocations of the W–Cr nanograins during plasma milling makes it easier to overcome the thermodynamic barrier in the formation of a solid–solution, when compared with conventional milling.

W-Cr 合金系统中的过饱和固溶体通过常规铣削和等离子铣削制造。研究了在有和没有放电等离子体的情况下球磨产生的固溶度的不同扩展机制。P-铣削 W-Cr 合金系统中 Cr 在 W 中的固溶度更高，这表明等离子铣削比常规铣削更容易促进 W(Cr) 固溶体的形成。根据 Miedema 的模型，在 W-Cr 合金系统中，由于放电等离子体的热效应，与传统铣削相比，通过等离子体铣削形成 W(Cr) 固溶体的自由能变化有所降低。所以，