Yang Jianyong, Zhuo Guanqun, Jiang Kaiyong, Zhu Xinghan, Su Linfen
College of Mechanical Engineering and Automation, Huaqiao University, Xiamen 361021, China.
Fujian Key Laboratory of Special Energy Manufacturing, Huaqiao University, Xiamen 361021, China.
Materials (Basel). 2020 Mar 9;13(5):1229. doi: 10.3390/ma13051229.
The oxidation behavior of three Nb-Si-based alloys were evaluated at intermediate (800 °C) and high (1250 °C) temperatures for 100 h in air. At 800 °C, the Nb-24Ti-15Si-13Cr-2Al-2Hf (at. %) alloy suffered from catastrophic pest oxidation. This pest phenomenon was suppressed by the addition of Sn. However, Ta addition protected the Nb-Si-based alloys from pest oxidation for a short time. At 1250 °C, Sn could enhance the oxidation resistance of Nb-Si-based alloys due to the formation of a Sn-rich layer. In addition, the oxidation mechanisms of Nb-Si-based alloys at intermediate and high temperatures were discussed.
在空气中,对三种铌硅基合金在中温(800℃)和高温(1250℃)下进行了100小时的氧化行为评估。在800℃时,Nb-24Ti-15Si-13Cr-2Al-2Hf(原子百分比)合金遭受灾难性的虫害氧化。添加锡可抑制这种虫害现象。然而,添加钽可在短时间内保护铌硅基合金免受害虫氧化。在1250℃时,由于形成了富锡层,锡可提高铌硅基合金的抗氧化性。此外,还讨论了铌硅基合金在中温和高温下的氧化机制。