| Cite this article as: |
Wang Wei, Hong-rui Yue, and Xiang-xin Xue, Diffusion coefficient of Ti4+ in calcium ferrite/calcium titanate diffusion couple, Int. J. Miner. Metall. Mater., 27(2020), No. 9, pp. 1216-1225. https://doi.org/10.1007/s12613-020-2057-5
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This study investigated the interdiffusion of calcium ferrite/calcium titanate system in the time range of 0–120 min by the diffusion couple method in a CO/N2 reducing atmosphere at 700°C. The results show that after the diffusion reaction occurred, no longitudinal agglomerations were present on the substrate surface on the calcium titanate side. When the diffusion time was increased to 105 min, a net vacancy flow from calcium titanate to calcium ferrite might have occurred, causing the surface of the calcium ferrite substrate to collapse. The thickness of the diffusion layer of the calcium ferrite/calcium titanate system was about 17–48 μm, which conforms to the parabolic law of diffusion. The diffusion coefficient and the Ti4+ concentration in the calcium ferrite/calcium titanate system are related. This shows an increase in the diffusion coefficient with the increase of Ti4+ concentration, and the diffusion coefficient value was in the range of 10−12–10−11 cm2·s−1.
| [1] |
Q.X Wu, J.P. Wang, D. Che, and Y. Gu, Situation analysis and sustainable development suggestions of vanadium resources in china, Resour. Ind., 2016, No. 3, p. 29.
|
| [2] |
S. Li, Study on China’s Iron Ore Import and Countermeasures [Dissertation], Dongbei University of Finance and Economics, Dalian, 2010.
|
| [3] |
D.B. Zhang, H.M. Wan, and J. Zheng, Analysis on global iron ore resources and China’s iron ore supply and demand, China Metall., 2004, No. 6, p. 26.
|
| [4] |
F.K. Meng, Current status and prospects of utilization of titanium resources in Chengde, Titanium Ind.Prog., 2001, No. 5, p. 11.
|
| [5] |
J.M. Ma and C.X. Cheng, New types of development and utilization of iron ore resources in China—Ultra-lean vanadium-titanium magnetite of Chengde, Land Resour. Inf., 2006, No. 11, p. 53.
|
| [6] |
J.H. Ju, X.X. Huang, Y.Z. Xue, and M. Song, Thoughts of mineral resources conservation and comprehensive utilization in China in new era, China Min. Mag., 27(2018), No. 1, p. 1.
|
| [7] |
J.S. Zhu, Beneficiation and comprehensive utilization of vanadium-titanium magnetite, Met. Mine, 2000, No. 1, p. 1.
|
| [8] |
W.Z. Fu, Basic analysis of the characteristics and comprehensive utilization of the vanadium-titanium magnetite resources in Panxi, Multipurpose Util. Miner. Resour., 1996, No. 1, p. 27.
|
| [9] |
M.X. Xu, Influences of metallurgical properties of sinter on its quality and major operation indexes of blast furnace, Sintering Pelletizing, 39(2014), No. 3, p. 1.
|
| [10] |
Y. Chen, The Investigation of Phase Constitution and Reaction Between Titanium Dioxide and Calcium Ferrite [Dissertation], Chongqing University, Chongqing, 2017.
|
| [11] |
G.J. Cheng, X.X. Xue, T. Jiang, and P.N. Duan, Effect of TiO2 on the crushing strength and smelting mechanism of high-chromium vanadium–titanium magnetite pellets, Metall. Mater. Trans. B, 47(2016), No. 3, p. 1713. doi: 10.1007/s11663-016-0628-7
|
| [12] |
M.G. He, Effect of w(TiO2) on sintering properties of high titanium vanadium–titanium magnetite, Iron Steel, 51(2016), No. 5, p. 9.
|
| [13] |
R. Budzik, The balance of titanium and vanadium in the blast furnace with the use of sinter containing a titanium–vanadium-magnetite concentrate, Metalurgija, 46(2007), No. 2, p. 145.
|
| [14] |
C.Y. Ding, X.W. Lv, Y. Chen, G. Li, W.C. He, and X.M. Lv, Reaction sequence and formation kinetics of perovskite by calcium ferrite–titania reaction, J. Alloys Compd., 789(2019), p. 537. doi: 10.1016/j.jallcom.2019.02.325
|
| [15] |
H.M. Yang and G.Z. Qiu, Mechanism of TiO2 affecting sinter RDI, Multipurpose Utiliz. Minser. Resour., 1998, No. 1, p. 12.
|
| [16] |
X.L. Han, H.F. Wang, L.N. Liu, M.Y. Yao, and Y.H. Wang, Influence of basicity on microstructure of vanadium–titanium magnetite sinter, Iron Steel Vanadium Titanium, 30(2009), No. 3, p. 56.
|
| [17] |
C.E. Loo and N.J. Bdstow, Study on low-temperature reduction degradation mechanism of sinter, Sintering Pelletizing, 20(1995), No. 4, p. 23.
|
| [18] |
Z.S. Ren, X.J. Hu, S.Y. Li, X.X. Xue, and K.C. Chou, Interdiffusion in the Fe2O3–TiO2 system, Int. J. Miner. Metall. Mater., 20(2013), No. 3, p. 273. doi: 10.1007/s12613-013-0723-6
|
| [19] |
Z.S. Ren, X.J. Hu, X.X. Xue, and K.C. Chou, Solid state reaction studies in Fe3O4–TiO2 system by diffusion couple method, J. Alloys Compd., 580(2013), p. 182. doi: 10.1016/j.jallcom.2013.05.114
|
| [20] |
J.C. Zhao, A combinatorial approach for structural materials, Adv. Eng. Mater., 3(2001), No. 3, p. 143. doi: 10.1002/1527-2648(200103)3:3<143::AID-ADEM143>3.0.CO;2-F
|
| [21] |
D. Wu, L.G. Zhang, L.B. Liu, W.M. Bai, and L.J. Zeng, Effect of Fe content on microstructures and properties of Ti6Al4V alloy with combinatorial approach, Trans. Nonferrous Met. Soc. China, 28(2018), No. 9, p. 1714. doi: 10.1016/S1003-6326(18)64815-0
|
| [22] |
Z.P. Jin, The application of ternary diffusion couple technique to study phase diagram, J. Cent. South Univ. Sci. Technol., 1984, No. 1, p. 27.
|
| [23] |
Z.P. Jin, Application of phase diagram in composite materials and surface treatment, Nat. Mag., 9(1986), No. 5, p. 340.
|
| [24] |
A.A. Kodentsov, G.F. Bastin, and F.J.J. van Loo, The diffusion couple technique in phase diagram determination, J. Alloys Compd., 320(2001), No. 2, p. 207. doi: 10.1016/S0925-8388(00)01487-0
|
| [25] |
J.S. Georgiev and L.A. Anestiev, Influence of the surface processes on the hydrogen permeation through ferritic steel and amorphous Fe40Ni40Mo4B16 alloy specimens, J. Nucl. Mater., 249(1997), No. 2-3, p. 133. doi: 10.1016/S0022-3115(97)00228-6
|
| [26] |
Z.H. Xu, R.D Mu, X.Q. Cao, and L.M. He, Study of the interdiffusion behavior between NiCrAlYSi coating and Ni-based superalloy substrate, J. Mater. Eng., 2009, No. 2, p. 67.
|
| [27] |
C. Greskovich and V.S. Stubican, Interdiffusion studies in the system MgO–Cr2O3, J. Phys. Chem. Solids, 30(1969), No. 4, p. 909. doi: 10.1016/0022-3697(69)90288-1
|
| [28] |
P. Zhang, T. Debroy, and S. Seetharaman, Interdiffusion in the MgO–Al2O3 spinel with or without some dopants, Metall. Mater. Trans. A, 27(1996), No. 8, p. 2105. doi: 10.1007/BF02651865
|
| [29] |
C.A.C. Sequeira and L. Amaral, Role of kirkendall effect in diffusion processes in solids, Trans. Nonferrous Met. Soc. China, 24(2014), No. 1, p. 1. doi: 10.1016/S1003-6326(14)63021-1
|
| [30] |
Y.N. Wen, Study on the Formation of Metal Hollows and the Mechanism of Atomic Migration [Dissertation], Shaanxi Normal University, Xi’an, 2011.
|
| [31] |
Y.M. Sung, W.C. Kwak, and S. Kim, Kinetics of PbTiO3 perovskite phase formation via an interfacial reaction, J. Mater. Res., 17(2002), No. 2, p. 407. doi: 10.1557/JMR.2002.0057
|
| [32] |
J.C. Zheng, X.J. Hu, Z.S. Ren, X.X. Xue, and K.C. Chou, Solid-state reaction studies in Al2O3–TiO2 system by diffusion couple method, ISIJ Int., 57(2017), No. 10, p. 1762. doi: 10.2355/isijinternational.ISIJINT-2017-042
|
| [33] |
W.K. Burns, P.H. Klein, E.J. West, and L.E. Plew, Ti diffusion in Ti: LiNbO3 planar and channel optical waveguides, J. Appl. Phys., 50(1979), No. 10, p. 6175. doi: 10.1063/1.325801
|
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