界面能调控熔体中纳米颗粒分布铝热合成铁基ODS合金
作者简介 刘建学,男,1990年生,硕士生
收稿日期: 2016-10-05
网络出版日期: 2017-04-17
基金资助
国家自然科学基金项目No.51472015
Effect of Interfacial Energy on Distribution of Nanoparticle in the Melt During the Preparation of Fe-Based ODS Alloys by Thermite Reaction
Received date: 2016-10-05
Online published: 2017-04-17
Supported by
Supported by National Natural Science Foundation of China (No.51472015)
利用铝热合成工艺结合快速凝固技术制备了铁基氧化物弥散强化(ODS)合金。经过优化铝热剂成分,合金熔体中不仅原位生成了α-Al2O3纳米颗粒,还发生了液相调幅分解,形成了富Fe、Cr与富Ni、Al的两相结构。因为α-Al2O3与富Ni、Al相之间的界面能较低,Al2O3纳米颗粒与富Ni、Al相结合,从而在基体中均匀分布。分析了反应熔体发生液相调幅分解的热力学可能性以及纳米颗粒在界面能和Brownian运动影响下的移动速率。实验结果表明,液相调幅分解得到的NiAl相呈球形,直径约50 nm,体积分数约50%;反应合成的α-Al2O3颗粒直径约5 nm,受界面能作用全部与NiAl相结合。计算表明,受界面能和Brownian运动影响,α-Al2O3颗粒移动速率极快,快速冷却过程中完全有时间在两相液体间完成移动和分布。测试表明,铁基ODS合金平均拉伸强度为602 MPa,延伸率为21%,大气环境中1000 ℃下氧化100 h后增重0.4 mg/cm2。
刘建学 , 席文君 , 李能 , 李树杰 . 界面能调控熔体中纳米颗粒分布铝热合成铁基ODS合金[J]. 金属学报, 2017 , 53(8) : 1011 -1017 . DOI: 10.11900/0412.1961.2016.00438
Fe-based oxide dispersion strengthened (ODS) alloys are conventionally manufactured through mechanical alloying. Such route even involves an expensive milling step but the oxide surface still could not avoid being contaminated. This work developed a new method by combination of thermite reaction and rapid solidification (RS) to prepare ODS alloys. Attributing to the optimization of thermite mixture composition, nanoparticle α-Al2O3 was synthetized in situ and the molten alloy was modulated by spinodal decomposition (SD) into Fe, Cr-rich and Ni, Al-rich regions. During the cooling of the melt, the low interfacial energy between α-Al2O3 and Ni, Al-rich region was also considered in the process for nanoparticles α-Al2O3 to assemble into NiAl, thus they could uniformly distribute in matrix. This work focuses on the thermodynamic analysis of SD in the melt alloy and the speed of the nanoparticles α-Al2O3 under the influence of interfacial energy and Brownian motion. Experiment results shows that the spherical NiAl segregated by SD has a mean diameter of about 50 nm, whose volume fraction reaches up to 50%; and nanoparticle α-Al2O3, formed during thermite reaction, has a diameter of 5 nm combined into NiAl under the influence of interfacial energy. Computation results indicate that, driven by interfacial energy and Brownian motion, nanoparticle α-Al2O3 could move fast enough into Ni, Al-rich region before solidification accomplishes during RS. Test results imply that the tensile strength of Fe-based ODS alloy is 602 MPa with ultimate elongation of 21% and its mass gain under 1000 ℃ in air for 100 h is 0.4 mg/cm2.
| [1] | Wright I G, Wilcox B A, Jaffee R I.The high-temperature oxidation of Ni-20%Cr alloys containing various oxide dispersions[J]. Oxid. Met., 1975, 9: 275 |
| [2] | Nagai H, Takebayashi Y, Mitani H.Effect of dispersed oxides of rare earths and other reactive elements on the high temperature oxidation resistance of Fe-20Cr alloy[J]. Metall. Trans., 1981, 12A: 435 |
| [3] | Ukai S, Harada M, Okada H, et al.Alloying design of oxide dispersion strengthened ferritic steel for long life FBRs core materials[J]. J. Nucl. Mater., 1993, 204: 65 |
| [4] | Merzhanov A G.Self-propagating high-temperature synthesis: twenty years of search and findings [A]. Combustion and Plasma Synthesis of High-Temperature Materials[M]. New York: VCH Publishers, 1990: 1 |
| [5] | Duan H P, Sheng Y, Liu M, et al.Stainless steel lined composite steel pipe produced by centrifugal SHS process[J]. J. Mater. Sci. Lett., 1996, 15: 1060 |
| [6] | Xi W J, Yin S, Guo S J, et al.Stainless steel lined composite steel pipe prepared by centrifugal-SHS process[J]. J. Mater. Sci., 2000, 35: 45 |
| [7] | Xi W J, Peng R L, Wu W, et al.Al2O3 nanoparticle reinforced Fe-based alloys synthesized by thermite reaction[J]. J. Mater. Sci., 2012, 47: 3585 |
| [8] | Cui Y, Xi W J, Wang X, et al.Al2O3 nanoparticle and NiAl reinforced Fe-based ODS alloys synthesized by thermite reaction[J]. Acta Metall. Sin., 2015, 51: 791(崔跃, 席文君, 王星等. 纳米Al2O3和NiAl共同强化的铁基ODS合金的铝热合成研究[J]. 金属学报, 2015, 51: 791) |
| [9] | Wang X, Xi W J, Cui Y, et al.Microstructure evolution mechanism and mechanical properties of FeNiCrAl alloy reinforced by coherent NiAl synthe-sized by thermite process[J]. Acta Metall. Sin. 2015, 51: 483(王星, 席文君, 崔跃等. 铝热合成NiAl共格强化的FeNiCrAl合金的组织演化机理和力学性能[J]. 金属学报, 2015, 51: 483) |
| [10] | Wu W, Xi W J.Effect of heat decomposition process and thermal treatment for TiO2 Xerogel powder on surface organic functional groups[J]. Chin. J. Inorg. Chem., 2011, 27: 659(吴伟, 席文君. 二氧化钛干凝胶热分解及热处理对表面有机官能团变化的影响[J]. 无机化学学报, 2011, 27: 659) |
| [11] | Chen R F, Liu H T.Preparation of Cr-doped TiO2/SiO2 photocatalysts and their photocatalytic properties[J]. J. Chin. Chem. Soc., 2011, 58: 947 |
| [12] | Hao S M, Ishida K, Nishizawa T.Role of alloying elements in phase decomposition in alnico magnet alloys[J]. Metall. Trans., 1985, 16A: 179 |
| [13] | Bradley A J.Microscopical studies on the iron-nickel-aluminium system. Part I——α+β alloys and isothermal sections of the phase equilibrium diagram[J]. J. Iron Steel Inst., 1949, 163: 19 |
| [14] | Bradley A J.Microscopical studies on the iron-nickel-aluminium system. Part II——The breakdown of the body-centered cubic lattice[J]. J. Iron Steel Inst., 1951, 168: 233 |
| [15] | Bradley A J.Microscopical studies on the iron-nickel-aluminium system. Part III——Transformations of the β and β' phase[J]. J. Iron Steel Inst., 1952, 171: 41 |
| [16] | Hao S M, Takayama T, Ishida K, et al.Miscibility gap in Fe-Ni-Al and Fe-Ni-Al-Co systems[J]. Metall. Trans., 1984, 15A: 1819 |
| [17] | Wang C P, Liu X J, Ohnuma I, et al.Thermodynamic database of the phase diagrams in Cu-Fe base ternary systems[J]. J. Phase Equilib. Diff., 2004, 25: 320 |
| [18] | Baumli P, Sytchev J, Kaptay G.Perfect wettability of carbon by liquid aluminum achieved by a multifunctional flux[J]. J. Mater. Sci., 2010, 45: 5177 |
| [19] | Rohrer G S.Grain boundary energy anisotropy: A review[J]. J. Mater. Sci., 2011, 46: 5881 |
| [20] | Triantafyllou G, Angelopoulos G N, Nikolopoulos P.Surface and grain-boundary energies as well as surface mass transport in polycrystalline yttrium oxide[J]. J. Mater. Sci., 2010, 45: 2015 |
| [21] | Nikolopoulos P, Agathopoulos S, Tsoga A.A method for the calculation of interfacial energies in Al2O3 and ZrO2/liquid-metal and liquid-alloy systems[J]. J. Mater. Sci., 1994, 29: 4393 |
| [22] | Sharan A, Cramb A W.Surface tension and wettability studies of liquid Fe-Ni-O alloys[J]. Metall. Mater. Trans., 1997, 28B: 465 |
| [23] | Silvain J F, Bihr J C, Douin J.Wettability, reactivity and stress relaxation of an NiAl(Ti)/Al2O3 composite[J]. Compos. Appl. Sci. Manuf., 1998, 29A: 1175 |
| [24] | Nakanishi K, Soga N.Phase separation in silica sol-gel system containing polyacrylic acid I. Gel formaation behavior and effect of solvent composition[J]. J. Non-Cryst. Solids, 1992, 139: 1 |
| [25] | Kaptay G.Interfacial criterion of spontaneous and forced engulfment of reinforcing particles by an advancing solid/liquid interface[J]. Metall. Mater. Trans., 2001, 32A: 993 |
| [26] | K?rber C, Rau G, Cosman M D, et al.Interaction of particles and a moving ice-liquid interface[J]. J. Cryst. Growth, 1985, 72: 649 |
| [27] | Uhlmann D R, Chalmers B, Jackson K A.Interaction between particles and a solid-liquid interface[J]. J. Appl. Phys., 1964, 35: 2986 |
| [28] | Sen S, Dhindaw B K, Stefanescu D M, et al.Melt convection effects on the critical velocity of particle engulfment[J]. J. Cryst. Growth, 1997, 173: 574 |
| [29] | Washizu T, Nagasaka T, Hino M.Viscosity of liquid Fe-Cu-Si alloy formed in new melting process for domestic waste incineration residue[J]. Mater. Trans., 2001, 42: 471 |
| [30] | Huang Z Q, Ding E J.Surface Wetting and Wetting Transition [M]. Shanghai: Shanghai Science & Technical Publishers, 1994: 40(黄祖洽, 丁鄂江. 表面浸润和浸润相变 [M]. 上海: 上海科学技术出版社, 1994: 40) |
| [31] | Chen Z Q, Dai M G.Colloidal Chemistry [M]. Beijing: Higher Education Press, 1984: 38(陈宗淇, 戴闽光. 胶体化学[M]. 北京: 高等教育出版社, 1984: 38) |
| [32] | Wang J Y, Yuan W, Mishra R S, et al.Microstructure and mechanical properties of friction stir welded oxide dispersion strengthened alloy[J]. J. Nucl. Mater., 2013, 432: 274 |
| [33] | Quadakkers W J, Holzbrecher H, Briefs K G, et al.Differences in growth mechanisms of oxide scales formed on ODS and conventional wrought alloys[J]. Oxid. Met., 1989, 32: 67 |
| [34] | Klueh R L, Shingledecker J P, Swindeman R W, et al.Oxide dispersion-strengthened steels: a comparison of some commercial and experimental alloys[J]. J. Nucl. Mater., 2005, 341: 103 |
| [35] | Montealegre M A, Strehl G, González-Carrasco J L, et al. Oxidation behaviour of novel ODS FeAlCr intermetallic alloys[J]. Intermetallics, 2005, 13: 896 |
| [36] | Weinbruch S, Anastassiadis A, Ortner H M, et al.On the mechanism of high-temperature oxidation of ODS superalloys: significance of yttrium depletion within the oxide scales[J]. Oxid. Met., 1999, 51: 111 |
| [37] | Wittenberger J D.Creep and tensile properties of several oxide-dispersion-strengthened nickel-base alloys at 1365 K [R]. Cleveland, OH, United States: NASA Lewis Research Center, 1977 |
| [38] | Pint B A, Wright I G.Oxidation behavior of ODS Fe-Cr alloys[J]. Oxid. Met., 2005, 63: 193 |
| [39] | Sokolov M A, Hoelzer D T, Stoller R E, et al. Fracture toughness and tensile properties of nano-structured ferritic steel 12YWT [J]. J. Nucl. Mater., 2007, 367-370: 213 |
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