Qing-Gong Song, Li-Jie Wang, Yan-Xia Zhu, Jian-Hai Kang, Wei-Feng Gu, Ming-Chao Wang, Zhi-Feng Liu. Effects of Si and Y co-doping on stability and oxidation resistance of γ-TiAl based alloys [J]. Acta Physica Sinica, 2019, 68(19): 196101-1
- Acta Physica Sinica
- Vol. 68, Issue 19, 196101-1 (2019)
Fig. 1. Structure models of γ -TiAl: (a) The L10 face-center tetragonal unit cell; (b) the least tetragonal unit cell; (c) the unit of Sp0(Ti8Al8).
γ -TiAl晶胞结构模型 (a) L10型面心四方结构单元; (b)最小结构单元; (c) Sp0(Ti8Al8)结构单元
Fig. 2. Structure models of γ -TiAl including O (Ti8Al8O): (a) Sp0-Oa; (b) Sp0-Ob; (c) Sp0-Oc; (d) Sp0-Od包含O原子的γ -TiAl晶胞结构模型 (a) Sp0-Oa; (b) Sp0-Ob; (c) Sp0-Oc; (d) Sp0-Od
Fig. 3. Typical structure models of γ -TiAl including Ti or Al vacancy: (a) Sp0-□Ti (Ti7□Al8); (b) Sp0-□Al (Ti8Al7□)
包含Ti空位或Al空位的γ -TiAl典型结构模型 (a) Sp0-□Ti (Ti7□Al8); (b) Sp0-□Al (Ti8Al7□)
Fig. 4. Typical structure models of Si and Y co-doping γ -TiAl: (a) Sd1x (Ti6SiYAl8); (b) Sd2 (Ti7YAl7Si); (c)Sd3 (Ti7SiAl7Y); (d) Sd4(Ti8Al6SiY)
Si和Y替位双掺杂γ -TiAl体系的典型结构模型 (a) Sd1x (Ti6SiYAl8); (b) Sd2 (Ti7YAl7Si); (c) Sd3 (Ti7SiAl7Y); (d) Sd4(Ti8Al6SiY)
Fig. 5. Typical structure models of Si and Y co-doping γ -TiAl including O: (a) Sd1x -Od (Ti6SiYAl8O); (b) Sd2x -Od (Ti7YAl7SiO); (c) Sd3x -Od (Ti7SiAl7YO); (d) Sd4x- Od(Ti8Al6SiYO)
Si和Y替位双掺杂γ -TiAl含氧体系的典型结构模型 (a) Sd1x- Od (Ti6SiYAl8O); (b) Sd2x -Od (Ti7YAl7SiO); (c) Sd3x -Od (Ti7SiAl7YO); (d) Sd4x -Od(Ti8Al6SiYO)
Fig. 6. Typical structure models of Si and Y co-doping γ -TiAl including vacancy: (a)Sd1x- □Ti (Ti5SiY□Al8); (b) Sd2x- □Ti (Ti6Y□Al7Si); (c) Sd3x- □Ti(Ti6Si□Al7Y); (d) Sd4x- □Ti(Ti7□Al6SiY); (e) Sd1x- □Al (Ti6SiYAl7□); (f) Sd2x- □Al (Ti7YAl6Si□); (g) Sd3x- □Al(Ti7SiAl6Y□); (h) Sd4x- □Al(Ti8Al5SiY□)
Si和Y替位双掺杂γ -TiAl含空位体系的典型结构模型 (a) Sd1x- □Ti (Ti5SiY□Al8); (b) Sd2x- □Ti (Ti6Y□Al7Si); (c) Sd3x- □Ti(Ti6Si□Al7Y); (d) Sd4x- □Ti(Ti7□Al6SiY); (e) Sd1x- □Al (Ti6SiYAl7□); (f) Sd2x- □Al (Ti7YAl6Si□); (g) Sd3x- □Al(Ti7SiAl6Y□); (h) Sd4x- □Al(Ti8Al5SiY□)
Fig. 7. Formation energies of interstitial O atoms in the Si and Y co-doping γ -TiAl systems.
Si和Y替位双掺杂γ -TiAl含氧体系中间隙O原子的形成能
Fig. 8. Formation energies of Ti and Al vacancies in Si and Y co-doping γ -TiAl systems.
Si和Y双掺杂γ -TiAl含空位体系中Ti空位和Al空位的形成能
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Table 1.
Energy properties of pure γ-TiAl and Si and Y co-doping γ-TiAl systems.
纯γ-TiAl体系与Si和Y替位双掺杂γ-TiAl体系的能量性质
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Table 2.
Elastic constants of tetragonal systems in pure γ-TiAl and Si and Y co-doping γ-TiAl systems.
纯γ-TiAl体系与Si和Y替位双掺杂γ-TiAl体系中四方晶系的弹性常数
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Table 3.
Elastic constants of Si and Y co-doping γ-TiAl systems Sd17, Sd2 and Sd3.
Si和Y替位双掺杂γ-TiAl体系Sd17, Sd2和Sd3的弹性常数
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Table 4.
Energy properties of pure γ-TiAl and the systems including O.
纯γ-TiAl体系及其含氧体系的能量性质
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Table 5.
Formation energies of interstitial O atoms in Si and Y co-doping γ-TiAl systems.
Si和Y替位双掺杂γ-TiAl含氧体系中间隙O原子的形成能
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Table 6.
Formation energies of Ti and Al vacancies in Si and Y co-doping γ-TiAl systems.
Si和Y双掺杂γ-TiAl含空位体系中Ti空位和Al空位的形成能
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