Abstract Novel tempered resin bonded ferro-silicon nitride-corundum refractories containing 0 wt.%, 15 wt.% and 25 wt.% ferro-silicon nitride were prepared respectively. Creep tests were performed under a load of 0.2 MPa at a temperature of 1300 °C for 50 hours in air. The results showed that creep performance was significantly improved by the addition of ferro-silicon nitride. Ferro-silicon nitride-corundum containing 15 wt.% ferro-silicon nitride initially presented a steady-state stage and was able to remain stable from the beginning of the holding time until 50 hours of creep testing. All the specimens exhibited cold crushing strength more than 100 MPa both before and after creep testing. Phase composition and microstructure were analyzed following the creep experiments. The results showed that Si 2 N 2 O and O’-sialon crystals formed in situ during creep testing, in addition to the conversion of α-Si 3 N 4 to β-Si 3 N 4 . Liquid Fe 3 Si from the ferro-silicon nitride component accelerated the formation of the O’-sialon and prolonged the growth of β-Si 3 N 4 , which improved the creep performance significantly. Fe 3 Si liquid migrated into the pores, and some Fe 3 Si coexisted with residual carbon from the resin, which filled a part of pores and protected the specimens from severe oxidation.

中文翻译：

---

1300℃蠕变后树脂结合氮化硅铁刚玉耐火材料的性能研究

摘要 分别制备了含0wt.%、15wt.%和25wt.%氮化硅铁的新型回火树脂结合氮化硅铁刚玉耐火材料。蠕变测试在 0.2 MPa 的负载下在 1300 °C 的温度下在空气中进行 50 小时。结果表明，加入氮化硅铁显着提高了蠕变性能。含有 15 wt.% 氮化硅铁的刚玉氮化硅铁最初呈现稳态阶段，并且能够从保持时间开始到 50 小时蠕变测试保持稳定。所有试样在蠕变试验前后均表现出超过 100 MPa 的冷抗压强度。在蠕变实验之后分析相组成和微观结构。结果表明，除了α-Si 3 N 4 向β-Si 3 N 4 的转化外，在蠕变试验期间还原位形成了Si 2 N 2 O 和O'-赛隆晶体。来自氮化硅铁组分的液态 Fe 3 Si 加速了 O'-sialon 的形成并延长了 β-Si 3 N 4 的生长，从而显着提高了蠕变性能。Fe 3 Si 液体迁移到孔隙中，部分 Fe 3 Si 与树脂中残留的碳共存，填充了部分孔隙，保护了试样免受严重氧化。