吴靓,段震,张汭,等.稀土金属Y对Ni-Cr-Al多孔材料高温抗氧化性能的影响[J].精密成形工程,2021,13(2):48-55.
WU Liang,DUAN Zhen,ZHANG Rui,et al.Effect of Rare Earth Metal Y on High Temperature Oxidation Resistance of Ni-Cr-Al Porous Materials[J].Journal of Netshape Forming Engineering,2021,13(2):48-55. |
| 稀土金属Y对Ni-Cr-Al多孔材料高温抗氧化性能的影响 |
| Effect of Rare Earth Metal Y on High Temperature Oxidation Resistance of Ni-Cr-Al Porous Materials |
| 投稿时间：2020-10-24 |
| DOI：10.3969/j.issn.1674-6457.2021.02.008 |
| 中文关键词: 稀土金属Y 粉末冶金法 高温抗氧化 Ni-Cr-Al多孔材料 |
| 英文关键词: rare earth metal Y powder metallurgy high temperature oxidation resistance Ni-Cr-Al porous material |
| 基金项目:国家自然科学基金(51504213);湖南省教育厅优秀青年项目(17B250);开放课题(AWJ-20-M02) |
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| 中文摘要: |
| 目的 研究稀土金属Y对Ni-Cr-Al多孔材料高温抗氧化性能的影响，探讨镍基多孔材料的应用原理。方法 以Ni，Cr，Al元素粉末为原材料，通过添加稀土金属Y，使用粉末冶金方法制备多孔材料，研究其在不同温度时间段氧化后的氧化动力学曲线以及稀土金属Y在氧化过程的作用。结果 相比Ni-Cr-Al多孔材料，Ni-Cr-Al-Y组的氧化增重在前期(0~40 h)更高，在中期(40~220 h)基本持平，但后期却(220~400 h)低于Ni-Cr-Al组;2Y组的开孔隙率在1000 ℃下氧化400 h后减少率约为40.22%，其余组的下降幅度均在25%附近;Ni-Cr-Al-Y多孔材料的初始物相组织中出现了(Ni,Y)固溶体，β-NiAl物相衍射峰减小。结论 稀土金属Y的主要作用为前期降低贫Al相生成Al2O3的浓度，中期起“钉扎”作用，后期隔绝空气。 |
| 英文摘要: |
| To study the effect of rare earth metal Y on the high-temperature oxidation resistance of Ni-Cr-Al porous materials, as well as to explore the application principles of nickel-based porous materials. The porous materials were prepared by powder metallurgy with Ni, Cr, and Al as raw materials and added rare earth Y. The oxidation kinetics curve after oxidation at different temperatures and in different time periods and the rare earth metal Y in the oxidation process effect was studied. The oxidizing weight of the Ni-Cr-Al-Y group increased higher than that of the Ni-Cr-Al porous material in the early stage (0-40 h), which was similar in the medium term (40-220 h) but lower in the later period (220-400 h) than the Ni-Cr-Al group. After 400 h of oxidation at 1000 ℃, the open porosity of Group 2Y was about 40.22%, and the decrease in the other groups was about 25%. The Ni-Cr-Al-Y porous material (Ni,Y) solid solution appeared in the initial phase structure, and the diffraction peak of β-NiAl phase decreased. The main role of rare earth metal Y is to reduce the concentration of Al2O3 formed by the poor Al phase in the early stage, play a “pinning” role in the middle stage with isolate the air at late stage. |
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