Experimental Investigation of Phase Equilibria in the Co-Re-Ta Ternary System
Abstract
:1. Introduction
2. Experimental Procedure
3. Results and Discussion
3.1. Microstructure
3.2. Isothermal Sections
4. Conclusions
Author Contributions
Funding
Acknowledgments
Conflicts of Interest
References
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System | Phase | Pearson Symbol | Space Group | Prototype | Structure Type | References |
---|---|---|---|---|---|---|
Re-Ta | (Re) | hP2 | P63/mmc | Mg | A3 | [15] |
χ-Re7Ta3 | cI58 | I-43m | αMn | A12 | [15] | |
σ-Re3Ta2 | tP30 | P42/mnm | σCrFe | D8b | [15] | |
bcc-(Ta) | cI2 | Im-3m | W | A2 | [15] | |
Co-Re | (αCo) | cF4 | Fm-3m | Cu | A1 | [15] |
(εCo, Re) | hP2 | P63/mmc | Mg | A3 | [15] | |
Co-Ta | (αCo) | cF4 | Fm-3m | Cu | A1 | [24] |
(εCo) | hP2 | P63/mmc | Mg | A3 | [24] | |
λ3-Co2Ta | hP24 | P63/mmc | Ni2Mg | C36 | [24] | |
λ2-Co2Ta | cF24 | Fd-3m | Cu2Mg | C15 | [24] | |
λ1-Co2Ta | hP12 | P63/mmc | Zn2Mg | C14 | [24] | |
μ-Co6Ta7 | hR13 | R-3m | Fe7W6 | D8b | [24] | |
CoTa2 | tI12 | I4/mcm | Al2Cu | C16 | [24] | |
bcc-(Ta) | cI2 | Im-3m | W | A2 | [24] | |
Co7Ta2 | hR36 | R-3m | BaPb3 [23] | - | [23,24] |
Nominal Alloys (at. %) | Annealed Time (days) | Phase Equilibrium | Composition (at. %) | |||||
---|---|---|---|---|---|---|---|---|
Phase 1/Phase 2/Phase 3 | Phase 1 | Phase 2 | Phase 3 | |||||
Re | Ta | Re | Ta | Re | Ta | |||
Co31Re35Ta34 | 65 | λ3/bcc-(Ta)/χ-Re7Ta3 | 19.7 | 26.5 | 46.5 | 45.5 | 52.7 | 34.8 |
Co45Re30Ta25 | 65 | λ3/(εCo, Re)/χ-Re7Ta3 | 20.1 | 25.5 | 30.4 | 22.0 | 60.1 | 26.0 |
Co60Re20Ta20 | 65 | (εCo, Re)/λ3 | 27.3 | 16.6 | 16.5 | 20.5 | ||
Co45Re20Ta35 | 65 | bcc-(Ta)/λ3 | 41.4 | 48.4 | 13.1 | 30.9 | ||
Co25Re20Ta55 | 65 | μ-Co6Ta7/bcc-(Ta) | 2.3 | 50.6 | 34.1 | 58.3 | ||
Co54Re25Ta21 | 65 | (εCo, Re)/λ3 | 28.7 | 19.1 | 18.4 | 22.9 | ||
Co78Re5Ta17 | 50 | (αCo)/λ3 | 2.7 | 3.3 | 4.7 | 21.8 | ||
Co44Re14Ta42 | 50 | λ3/μ-Co6Ta7/bcc-(Ta) | 2.7 | 33.8 | 3.8 | 43.7 | 39.2 | 51.2 |
Co22Re5Ta73 | 50 | CoTa2/bcc-(Ta) | 0.7 | 65.8 | 8.9 | 87.5 | ||
Co58Re3Ta39 | 50 | λ3/μ-Co6Ta7 | 1.9 | 33.6 | 3.2 | 43.4 | ||
Co80Re2Ta18 | 50 | (αCo)/λ3 | 0.9 | 3.5 | 1.8 | 22.7 | ||
Co80Re5Ta15 | 50 | (αCo)/λ3 | 3.5 | 3.6 | 5.7 | 20.8 | ||
Co80Re11Ta9 | 50 | (αCo)/λ3 | 9.2 | 2.7 | 13.8 | 17.2 | ||
Co74Re16Ta10 | 50 | (αCo)/λ3/(εCo, Re) | 10.1 | 2.4 | 15.2 | 17.3 | 25.0 | 14.2 |
Co54Re18Ta28 | 50 | λ3 | 18.2 | 28.3 | ||||
Co89Re5Ta6 | 50 | (αCo)/λ3 | 4.6 | 3.7 | 7.5 | 19.6 | ||
Co33Re5Ta62 | 50 | CoTa2/bcc-(Ta) | 1.7 | 59.2 | 18.0 | 77.3 | ||
Co30Re10Ta60 | 50 | μ-Co6Ta7/bcc-(Ta) | 1.7 | 54.2 | 24.0 | 71.3 | ||
Co69Re9Ta22 | 50 | λ3 | 9.3 | 22.3 | ||||
Co70Re5Ta25 | 50 | λ3 | 4.5 | 24.9 | ||||
Co71Re1Ta28 | 50 | λ2 | 0.8 | 28.2 | ||||
Co68Re3Ta29 | 50 | λ2 | 2.7 | 28.7 | ||||
Co66Re5Ta29 | 50 | λ3 | 4.7 | 28.5 | ||||
Co64Re7Ta29 | 50 | λ3 | 7.3 | 28.9 | ||||
Co60Re1Ta39 | 50 | λ2/μ-Co6Ta7 | 0.7 | 32.3 | 1.2 | 43.7 | ||
Co28Re6Ta66 | 50 | CoTa2/bcc-(Ta) | 1.4 | 60.2 | 14.2 | 80.7 | ||
Co43Re1Ta56 | 50 | CoTa2/μ-Co6Ta7 | 0.9 | 57.8 | 1.1 | 54.8 |
Nominal Alloys (at. %) | Annealed Time (days) | Phase Equilibrium | Composition (at. %) | |||||
---|---|---|---|---|---|---|---|---|
Phase 1/Phase 2/Phase 3 | Phase 1 | Phase 2 | Phase 3 | |||||
Re | Ta | Re | Ta | Re | Ta | |||
Co31Re35Ta34 | 50 | λ3/bcc-(Ta)/χ-Re7Ta3 | 21.7 | 26.1 | 50.0 | 47.6 | 56.6 | 31.4 |
Co45Re30Ta25 | 50 | λ3/(εCo, Re)/χ-Re7Ta3 | 21.7 | 25.4 | 31.3 | 24.3 | 59.9 | 26.8 |
Co60Re20Ta20 | 50 | (εCo, Re)/λ3 | 27.2 | 18.7 | 17.2 | 20.9 | ||
Co45Re20Ta35 | 50 | bcc-(Ta)/λ3 | 41.1 | 48.6 | 14.0 | 31.9 | ||
Co25Re20Ta55 | 50 | μ-Co6Ta7/bcc-(Ta) | 2.8 | 51.1 | 35.3 | 58.7 | ||
Co54Re25Ta21 | 50 | (εCo, Re)/λ3 | 28.0 | 20.9 | 20.1 | 22.9 | ||
Co78Re5Ta17 | 35 | (αCo)/λ3 | 2.7 | 4.4 | 4.3 | 21.9 | ||
Co44Re14Ta42 | 35 | λ3/μ-Co6Ta7/bcc-(Ta) | 3.5 | 35.3 | 4.0 | 44.2 | 39.4 | 50.4 |
Co22Re5Ta73 | 35 | CoTa2/bcc-(Ta) | 0.8 | 65.2 | 8.9 | 86.5 | ||
Co58Re3Ta39 | 35 | λ3/μ-Co6Ta7 | 2.4 | 34.4 | 3.3 | 43.9 | ||
Co80Re2Ta18 | 35 | (αCo)/λ3 | 1.4 | 4.9 | 1.8 | 22.5 | ||
Co80Re5Ta15 | 35 | (αCo)/λ3 | 3.2 | 4.2 | 5.5 | 21.1 | ||
Co80Re11Ta9 | 35 | (αCo)/λ3 | 9.7 | 3.0 | 13.6 | 18.4 | ||
Co74Re16Ta10 | 35 | (αCo)/λ3/(εCo, Re) | 11.2 | 2.8 | 15.5 | 17.6 | 24.9 | 15.3 |
Co54Re18Ta28 | 35 | λ3 | 18.3 | 28.2 | ||||
Co89Re5Ta6 | 35 | (αCo)/λ3 | 4.3 | 4.5 | 7.1 | 20.6 | ||
Co33Re5Ta62 | 35 | CoTa2/bcc-(Ta) | 1.5 | 59.6 | 19.5 | 76.8 | ||
Co30Re10Ta60 | 35 | μ-Co6Ta7/bcc-(Ta) | 2.0 | 55.1 | 23.5 | 72.2 | ||
Co69Re9Ta22 | 35 | λ3 | 8.4 | 22.0 | ||||
Co70Re5Ta25 | 35 | λ3 | 4.5 | 24.8 | ||||
Co71Re1Ta28 | 35 | λ2 | 0.8 | 28.0 | ||||
Co68Re3Ta29 | 35 | λ2 | 2.6 | 28.8 | ||||
Co66Re5Ta29 | 35 | λ3 | 4.8 | 29.0 | ||||
Co64Re7Ta29 | 35 | λ3 | 7.0 | 28.8 | ||||
Co60Re1Ta39 | 35 | λ2/μ-Co6Ta7 | 0.5 | 32.4 | 1.0 | 44.1 | ||
Co28Re6Ta66 | 35 | CoTa2/bcc-(Ta) | 1.3 | 60.2 | 15.9 | 79.6 | ||
Co43Re1Ta56 | 35 | CoTa2/μ-Co6Ta7 | 0.6 | 60.5 | 1.3 | 54.8 |
Nominal Alloys (at. %) | Annealed Time (days) | Phase Equilibrium | Composition (at. %) | |||||
---|---|---|---|---|---|---|---|---|
Phase 1/Phase 2/Phase 3 | Phase 1 | Phase 2 | Phase 3 | |||||
Re | Ta | Re | Ta | Re | Ta | |||
Co31Re35Ta34 | 25 | λ3/bcc-(Ta)/χ-Re7Ta3 | 22.2 | 27.1 | 49.0 | 48.5 | 56.6 | 32.6 |
Co45Re30Ta25 | 25 | λ3/(εCo, Re)/χ-Re7Ta3 | 22.6 | 26.1 | 32.0 | 23.2 | 58.7 | 25.8 |
Co60Re20Ta20 | 25 | (εCo, Re)/λ3 | 27.5 | 17.0 | 17.3 | 20.6 | ||
Co45Re20Ta35 | 25 | bcc-(Ta)/λ3 | 42.8 | 48.9 | 14.2 | 32.8 | ||
Co25Re20Ta55 | 25 | μ-Co6Ta7/bcc-(Ta) | 3.9 | 51.2 | 35.5 | 58.9 | ||
Co54Re25Ta21 | 25 | (εCo, Re)/λ3 | 28.8 | 18.9 | 19.7 | 22.1 | ||
Co78Re5Ta17 | 15 | (αCo)/λ3 | 2.8 | 5.5 | 5.0 | 21.3 | ||
Co44Re14Ta42 | 15 | λ3/μ-Co6Ta7/bcc-(Ta) | 5.5 | 36.4 | 6.1 | 43.2 | 41.8 | 50.4 |
Co22Re5Ta73 | 15 | CoTa2/bcc-(Ta) | 0.8 | 65.2 | 8.7 | 87.6 | ||
Co58Re3Ta39 | 15 | λ3/μ-Co6Ta7 | 2.7 | 35.4 | 3.6 | 44.0 | ||
Co80Re2Ta18 | 15 | (αCo)/λ3 | 1.3 | 5.6 | 1.9 | 22.3 | ||
Co80Re5Ta15 | 15 | (αCo)/λ3 | 3.5 | 5.0 | 5.9 | 20.8 | ||
Co80Re11Ta9 | 15 | (αCo)/λ3 | 10.0 | 3.8 | 13.8 | 17.8 | ||
Co74Re16Ta10 | 15 | (αCo)/λ3/(εCo, Re) | 13.0 | 2.6 | 16.2 | 17.8 | 26.0 | 14.2 |
Co54Re18Ta28 | 15 | λ3 | 18.2 | 28.5 | ||||
Co89Re5Ta6 | 15 | (αCo)/λ3 | 4.8 | 5.0 | 7.2 | 22.4 | ||
Co33Re5Ta62 | 15 | CoTa2/bcc-(Ta) | 2.1 | 59.2 | 19.2 | 76.2 | ||
Co30Re10Ta60 | 15 | μ-Co6Ta7/bcc-(Ta) | 2.4 | 54.1 | 24.2 | 71.4 | ||
Co69Re9Ta22 | 15 | λ3 | 8.9 | 22.0 | ||||
Co70Re5Ta25 | 15 | λ3 | 4.5 | 24.5 | ||||
Co71Re1Ta28 | 15 | λ2 | 0.7 | 27.8 | ||||
Co68Re3Ta29 | 15 | λ2 | 2.7 | 28.6 | ||||
Co66Re5Ta29 | 15 | λ3 | 4.6 | 28.4 | ||||
Co64Re7Ta29 | 15 | λ3 | 7.0 | 28.6 | ||||
Co60Re1Ta39 | 15 | λ2/μ-Co6Ta7 | 0.8 | 32.3 | 1.3 | 44.2 | ||
Co28Re6Ta66 | 15 | CoTa2/bcc-(Ta) | 1.8 | 58.3 | 14.9 | 81.1 | ||
Co43Re1Ta56 | 15 | CoTa2/μ-Co6Ta7 | 0.6 | 59.7 | 1.3 | 54.9 |
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Liu, X.; Wu, D.; Zhang, J.; Yang, M.; Zhu, J.; Li, L.; Chen, Y.; Yang, S.; Han, J.; Lu, Y.; et al. Experimental Investigation of Phase Equilibria in the Co-Re-Ta Ternary System. Metals 2018, 8, 911. https://doi.org/10.3390/met8110911
Liu X, Wu D, Zhang J, Yang M, Zhu J, Li L, Chen Y, Yang S, Han J, Lu Y, et al. Experimental Investigation of Phase Equilibria in the Co-Re-Ta Ternary System. Metals. 2018; 8(11):911. https://doi.org/10.3390/met8110911
Chicago/Turabian StyleLiu, Xingjun, Dan Wu, Jinbin Zhang, Mujin Yang, Jiahua Zhu, Lingling Li, Yuechao Chen, Shuiyuan Yang, Jiajia Han, Yong Lu, and et al. 2018. "Experimental Investigation of Phase Equilibria in the Co-Re-Ta Ternary System" Metals 8, no. 11: 911. https://doi.org/10.3390/met8110911