Co-Cr-V三元系富Co侧fcc相的互扩散及原子迁移率参数研究（英文）
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摘要
本研究制备了一系列Co-Cr-V合金,在1200℃下扩散处理259 200 s。利用电子探针显微分析(EPMA)技术测定了各扩散偶的浓度-距离曲线,并根据测得的浓度-距离曲线用Whittle and Green方法计算了Co-Cr-V三元系在1200℃下的互扩散系数。基于本研究的实验数据和文献报道的热力学信息和相关子二元系的动力学参数,利用DICTRA软件优化得到Co-Cr-V体系fcc相的原子迁移率参数。运用优化得到的原子迁移率参数计算互扩散系数,并与实验数据比对,取得较好的一致性,从而验证了所得迁移率参数的可靠性。同时运用该迁移率参数计算了各扩散偶的浓度-距离曲线和扩散路径,计算结果与实验数据均符合良好,进一步验证了参数的合理性和准确性。
Diffusion couples for Co-rich fcc Co-Cr-V alloys were prepared,all of which were annealed at 1473 K for 259 200 s.The interdiffusion coefficients in fcc Co-Cr-V ternary systems were investigated by means of Whittle and Green method with the help of electronic-probe microanalysis(EPMA).On the basis of the thermodynamic parameters available in the literature,the interdiffusion data were critically assessed to develop the atomic mobilities of the fcc Co-Cr-V alloys via the DICTRA software.Comprehensive comparisons between the calculated and experimental diffusion coefficients show that the experimental data can be well reproduced by the atomic mobilities obtained in this work.And the validity of the diffusion mobilities was tested by simulating the concentration-distance profiles and diffusion paths in diffusion couples.
Diffusion couples for Co-rich fcc Co-Cr-V alloys were prepared,all of which were annealed at 1473 K for 259 200 s.The interdiffusion coefficients in fcc Co-Cr-V ternary systems were investigated by means of Whittle and Green method with the help of electronic-probe microanalysis(EPMA).On the basis of the thermodynamic parameters available in the literature,the interdiffusion data were critically assessed to develop the atomic mobilities of the fcc Co-Cr-V alloys via the DICTRA software.Comprehensive comparisons between the calculated and experimental diffusion coefficients show that the experimental data can be well reproduced by the atomic mobilities obtained in this work.And the validity of the diffusion mobilities was tested by simulating the concentration-distance profiles and diffusion paths in diffusion couples.
引文
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28 Liu X J,Yu Y,Lu Y et al.Journal of Phase Equilibria and Diffusion[J],2017(6):1
29 Sohn Y H,Dayananda M A.Acta Materialia[J],2000,48(7):1427
2 Bauer A,Neumeier S,Pyczak F et al.Scripta Materialia[J],2010,63(12):1197
3 Davis J R.Nickel,Cobalt,and Their Alloys[M].New York:ASMInternational,2000:122
4 Sims C T,Stoloff N S,Hagel W C.Materialsence[J],1987,55(2):163
5 Andersson J O,?gren J.Journal of Applied Physics[J],1992,72(4):1350
6 Andersson J O,H?glund L,J?nsson B et al.Fundamentals&Applications of Ternary Diffusion[J],1990,14:153
7 Kaufman L,Bernstein H.Computer Calculation of Phase Diagrams with Special Reference to Refractory Metals[M].New York:Academic Press,1970:4
8 Sundman B,Jansson B,Andersson J O et al.Calphad[J],1985,9:153
9 Borgenstam A,H?glund L,?gren J et al.Journal of Phase Equilibria[J],2000,21(3):269
10 Cui Y W,Jiang M,Ohnuma I et al.Journal of Phase Equilibria and Diffusion[J],2008,29(4):312
11 Chen Jie,Liu Yajun,Lei Fuyue et al.Calphad[J],2014,47:123
12 Zhang Weibin,Liu Dandan,Zhang Lijun et al.Calphad[J],2014,45:118
13 Chang Hui,Xu Guanglong,Lu X G et al.Scripta Materialia[J],2015,106:13
14 Chen Jie,Liu Yajun,Lei Fuyue et al.Calphad[J],2015,48:145
15 Chen Jie,Liu Yajun,Sheng Guang et al.Journal of Alloys and Compounds[J],2015,621:428
16 He Xuwen,Zhang Weibin,Yan Mingyuan et al.Calphad[J],2015,49:35
17 Kirkaldy J S.Canadian Journal of Physics[J],2011,35(4):435
18 Whittle D P,Green A.Scripta Metallurgica[J],1974,8(7):883
19 ?gren J.Journal of Physics&Chemistry of Solids[J],1982,43(4):385
20 ?gren J.Journal of Physics&Chemistry of Solids[J],1982,42(5):421
21 Andersson J O,H?glund L,J?nsson B et al.Fundamentals&Applications of Ternary Diffusion[J],1990,58
22 J?nsson B.Zeitschrift Für Metallkunde[J],1994,85(7):498
23 Redlich O,Kister A T.Indengchem[J],2002,40(2):345
24 Hillert M.Calphad-computer Coupling of Phase Diagrams&Thermochemistry[J],1980,4(1):1
25 Kirkaldy J S,Weichert D,Haq Z U.Canadian Journal of Physics[J],2011,41(12):2166
26 Zhao C C,Yu Y,Liu X J et al.Journal of Phase Equilibria and Diffusion[J],2012,41(3):189
27 Campbell C E,Boettinger W J,Kattner U R.Acta Materialia[J],2002,50(4):775
28 Liu X J,Yu Y,Lu Y et al.Journal of Phase Equilibria and Diffusion[J],2017(6):1
29 Sohn Y H,Dayananda M A.Acta Materialia[J],2000,48(7):1427