采用真空非自耗电弧熔炼法制备了5种成分为Nb-22Ti-15Si-5Cr-3Al-3Hf-xY (x=0,0.03,0.06,0.12,0.30 at％)的合金,并在1250℃下分别进行了1、10、20和50 h的高温氧化实验,研究Y含量对合金电弧熔炼态组织及其高温抗氧化性能的影响.结果表明:添加Y不改变电弧熔炼态合金相组成,组织仍由Nbss及γ-(Nb,X)sSi3相组成,但细化了共晶组织.高温氧化实验结果表明,不同Y含量合金在氧化不同时间后,氧化膜均由Nb2 O5,TiO2,Ti2 Nb10O29和TiNb2O7组成;随着Y含量的增加,氧化膜中的孔洞和裂纹减少,合金单位面积氧化增重也逐渐减小,表明Y的添加能够显著提高合金的高温抗氧化性能.
参考文献
| [1] | B. P. BEWLAY;M. R. JACKSON;J. -C. ZHAO.A Review of Very-High-Temperature Nb-Suicide-Based Composites[J].Metallurgical and Materials Transactions, A. Physical Metallurgy and Materials Science,200310(10):2043-2052. |
| [2] | E. Sarath K Menon;Madan G. Mendiratta.High Temperature Oxidation in Multicomponent Nb Alloys[J].Materials Science Forum,2005Pt.1(Pt.1):717-720. |
| [3] | I. Grammenos;P. Tsakiropoulos.Study of the role of Al, Cr and Ti additions in the microstructure of Nb-18Si-5Hf base alloys[J].Intermetallics,20102(2):242-253. |
| [4] | K. Zelenitsas;P. Tsakiropoulos.Study of the role of Ta and Cr additions in the microstracture of Nb-Ti-Si-Al in situ composites[J].Intermetallics,20066(6):639-659. |
| [5] | N. Vellios;P. Tsakiropoulos.Study of the role of Fe and Sn additions in the microstructure of Nb-24Ti-18Si-5Cr silicide based alloys[J].Intermetallics,20109(9):1729-1736. |
| [6] | 吴鹤;韩雅芳;陈熙琛.稀土钇对Ti-Si共晶合金微观组织和力学性能的影响[J].铸造,2005(4):398-400. |
| [7] | 彭建;吕滨江;胡耀波;潘复生.稀土Y对Mg-2.0Zn-0.3Zr镁合金铸态组织和力学性能的影响[J].稀有金属材料与工程,2010(4):672-677. |
| [8] | 邢泽炳;聂祚仁;季小兰;王旭东;邹景霞.微量Er,Mn对Al-Mg合金组织与性能的影响[J].稀有金属材料与工程,2006(12):1979-1982. |
| [9] | QU ShiYu;HAN YaFang;KANG YongWang.Effects of Ti, Al and Hf on niobium silcides formation in the Nb-Si in situ composites[J].中国科学E辑（英文版）,2009(1):37-40. |
| [10] | N. Sekido;K. Hildal;R. Sakidja.Stability of the Nb_5Si_3 phase in the Nb-Mo-Si system[J].Intermetallics,2013:104-112. |
| [11] | Jie Geng;Panos Tsakiropoulos;Guosheng Shao.Oxidation of Nb-Si-Cr-Al in situ composites with Mo, Ti and Hf additions[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,20061/2(1/2):26-38. |
| [12] | B. A. Pint.Experimental Observations in Support of the Dynamic-Segregation Theory to Explain the Reactive-Element Effect[J].Oxidation of Metals,19961/2(1/2):1-37. |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%