This study examined the effect of ice-quenching after oxidation treatment on hardness change of a Pd-Cu-Ga-Zn metal-ceramic alloy during porcelain firing simulation. Although not statistically significant, the alloy was softened slightly during porcelain firing simulation with conventional slow cooling rate. On the other hand, the hardness increased significantly by ice-quenching instead of the slow cooling after oxidation (p<0.001). The gap in the final hardness depending on ice-quenching occurred in the matrix and plate-like precipitates but not in the particle-like structure without plate-like precipitates (p<0.05). The mechanism of ice-quenching after oxidation to prevent softening and induce hardening during porcelain firing simulation involved the more active precipitation and retardation of microstructural coarsening. In conclusion, for practical work on Pd-Cu-Ga-Zn alloys, the oxidation treatment followed by ice-quenching instead of slow cooling is recommended for the simultaneous oxidation and hardening effects on the alloy.

这项研究检查了氧化处理后的冰淬对瓷烧制模拟过程中Pd-Cu-Ga-Zn金属陶瓷合金硬度变化的影响。尽管没有统计学上的显着性，但该合金在瓷烧制过程中以常规的慢冷却速率略微软化。另一方面，通过冰淬而不是氧化后的缓慢冷却，硬度显着提高（p <0.001）。取决于冰淬的最终硬度的间隙出现在基质和板状沉淀物中，而在没有板状沉淀物的颗粒状结构中则没有（p <0.05）。氧化后的冰淬火机制可以防止软化并在瓷烧制过程中引起硬化，其中包括更活跃的析出和微结构粗化的延迟。综上所述，