Nb离子注入γ-TiAl的高温循环氧化行为

王薇; 史晶宇; 张永刚; 张通和

Nb离子注入γ-TiAl的高温循环氧化行为

1.
北京航空航天大学材料科学与工程系
2. 北京师范大学低能核物理所

基金项目: 国家自然科学基金资助项目(59895153)

详细信息

作者简介:
王薇(1963-), 女, 河南郑州人, 讲师, 100083, 北京.

中图分类号: TG 174
计量
- 文章访问数: 3047
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- 被引次数: 0
出版历程
- 收稿日期: 1999-10-29
- 网络出版日期: 2001-02-28

Cycling Oxidation Behavior of Nb-ion Implanted γ-TiAl

1.
Beijing University of Aeronautics and Astronautics, Dept. of Materials Science and Engineering
2. Beijing Normal University, Low Energy Nuclear Physics Institute

摘要

摘要: 研究了Nb离子注入的γ-TiAl合金在1123K和1173K空气中的高温循环氧化行为,用配有能谱仪的扫描电子显微镜对氧化层的形貌、显微结构进行了分析,用俄歇谱仪分析了注入元素和氧化层中各元素的分布.结果表明:Nb离子注入可以提高γ-TiAl合金的抗循环氧化性能.提高其抗氧化性能的主要原因归结于Nb离子在TiO₂中的掺杂作用.高价Nb的掺杂,降低了TiO₂的缺陷浓度,使TiO₂的生长受到抑制,在氧化初期形成了Al₂O₃保护层,从而推迟了氧化层的剥落时间.但Nb离子注入的γ-TiAl合金不具有长期的抗循环氧化性能.
- 离子注入 /
- 高温氧化试验 /
- 铌离子
Abstract: The thermal cycling oxidation behaviors of Nb-ion implanted γ-TiAl in air were studied in the temperature range of 1123~1173K. The microstructures of the oxide scales were examined by SEM equipped with EDS. Nb distribution and depth profiles of elements were analyzed by AES. The results indicated that the cyclic oxidation resistance of γ-TiAl alloy could be improved by Nb ion implantation. The reason why Nb-ion implantation improves the cyclic oxidation properties may be ascribed to doping of the titania lattice by Nb⁵⁺ ions, which may inhibit the growth of TiO₂ and enhance the growth rate of Al₂O₃. The formation of Al₂O₃ protective layer at the early stage decreased the oxidation rate and delayed the spallation of oxide scale. But Nb-ion implanted γ-TiAl has no long effect to thermal cycling oxidation resistance.
- ion implantation /
- high-temperature oxidation tests /
- Niobium ions

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参考文献(1)

[1] kim Y W, Dimiduk D M. Progress in the understanding of gamma titanium aluminides[J]. JOM, 1991,43(8):40~47. [2] 王贻华,胡正琼. 离子注入与分析基础[M]. 北京:航空工业出版社,1992.4~5. [3] Stroosnijder M F. Ion implantation for high temperature corrosion protection[J]. Surf Coat Technol, 1998,100-101:191~201. [4] Meier G H, Pettit F S. The oxidation behavior of intermetallic compounds[J]. Mater Sci Eng,1992,A153:548~560. [5] Lang C, Schutze M. TEM investigations of the early stages of TiAl oxidation[J]. Oxid Met, 1996,46(3-4):255~285. [6] Becker S,Rahmel A,Schorr M,et al.Mechanism of isothermal oxidation of the intermetallic TiAl and of TiAl alloys[J]. Oxid Met,1992,38(5-6):425~464. [7] Dettenwanger F, Schumann E, Ruhle M,et al. Microstructural study of oxidized γ-TiAl[J]. Oxid.Met,1998,50(3-4):269~307. [8] Hauffe K. Oxidation of metals[M]. New York:Plenum Press, 1965, 217.

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