Thermodynamic Aspects of Nanostructured CoAl Intermetallic Compound During Mechanical Alloying

J. Mater. Sci. Technol. ›› 2011, Vol. 27 ›› Issue (7): 601-606.

• Nanomaterials and Nanotechnology • 上一篇下一篇

Thermodynamic Aspects of Nanostructured CoAl Intermetallic Compound During Mechanical Alloying

Seyedeh Narjes Hosseini¹,²,Tayebeh Mousavi¹,²,fathallah karimzadeh²,Mohammad Hossein Enayati¹,²

1.
2. Isfahan University of Technology

收稿日期:2010-12-09 修回日期:2011-01-29 出版日期:2011-07-28 发布日期:2011-07-26
通讯作者: fathallah karimzadeh

Thermodynamic Aspects of Nanostructured CoAl Intermetallic Compound during Mechanical Alloying

S.N. Hosseini, T. Mousavi, F. Karimzadehy and M.H. Enayati

Department of Materials Engineering, Nanotechnology and Advanced Materials Institute, Isfahan University of Technology, 84156-83111, Iran

Received:2010-12-09 Revised:2011-01-29 Online:2011-07-28 Published:2011-07-26
Contact: F. Karimzadeh

摘要/Abstract

摘要： The nanostructured CoAl intermetallic compound was produced by mechanical alloying (MA) of the Co50Al50 elemental powder mixture in a planetary high energy ball mill. The ordered B2-CoAl structure with the grain size of about 6 nm was formed via a gradual reaction after 10 h of MA. A thermodynamic analysis of the process was also done. The results showed that the intermetallic compound of CoAl has the minimum Gibbs free energy compared to solid solution and amorphous states indicating the initial MA product is the most stable phase in the Co-Al system which was changed to a partially disoredered structure with a steady long-range order of 0.82 at further milling. This amount of disordering caused the enthalpy of final product to show an increase of about 5.1 kJmol-1. Calculation of enthalpy related to the triple defect formation revealed that the enthalpy required for Al anti-sites formation was about 3 times greater than that for Co anti-sites formation.

Abstract: The nanostructured CoAl intermetallic compound was produced by mechanical alloying (MA) of the Co₅₀Al₅₀ elemental powder mixture in a planetary high energy ball mill. The ordered B2-CoAl structure with the grain size of about 6 nm was formed via a gradual reaction after 10 h of MA. A thermodynamic analysis of the process was also done. The results showed that the intermetallic compound of CoAl had the minimum Gibbs free energy compared to solid solution and amorphous states indicating the initial MA product was the most stable phase in the Co-Al system which was changed to a partially disordered structure with a steady long-range order of 0.82 at further milling. This amount of disordering caused the enthalpy of final product to show an increase of about 5.1 kJ·mol^-1. Calculation of enthalpy related to the triple defect formation revealed that the enthalpy required for Al anti-sites formation was about 3 times greater than that for Co anti-sites formation.

Key words: Intermetallics, CoAl, Nanostructured materials, Mechanical alloying, Thermodynamics

Seyedeh Narjes Hosseini Tayebeh Mousavi fathallah karimzadeh Mohammad Hossein Enayati. Thermodynamic Aspects of Nanostructured CoAl Intermetallic Compound During Mechanical Alloying[J]. J. Mater. Sci. Technol., 2011, 27(7): 601-606.

S.N. Hosseini, T. Mousavi, F. Karimzadehy and M.H. Enayati. Thermodynamic Aspects of Nanostructured CoAl Intermetallic Compound during Mechanical Alloying[J]. J Mater Sci Technol, 2011, 27(7): 601-606.

参考文献

[1 ] Y. Takano: J. Am. Ceram. Soc., 2001, 84, 2445.

[2 ] R. Nakamura, K. Takasawa, Y. Yamazaki and Y. Iijima: Intermetallics, 2002, 10, 195.

[3 ] H. Bakker, G.F. Zhou and H. Yang: Progr. Mater. Sci., 1995, 39, 159.

[4 ] N.K. Mukhopadhyay, D. Mukherjee, S. Dutta, R. Manna, D.H. Kim and I. Manna: J. Alloy. Compd., 2008, 457, 177.

[5 ] G. Borzone, R. Raggio and R. Ferro: J. Mining Metall. B, 2002, 38, 249.

[6 ] P. Nandi, P.M.G. Nambissan and I. Manna: J. Alloy. Compd., 2004, 377, 179.

[7 ] V.K. Portnoi, K.V. Tretyakov and V.I. Fadeeva: Inorg. Mater., 2004, 40, 937.

[8 ] C. Suryanarayana: J. Prog. Mater. Sci., 2001, 46, 1.

[9 ] G.K. Williamson and W.H. Hall: Acta Metall., 1953, 1, 22.

[10] A.A. Karimpoor, U. Erb, K.T. Aust and G. Palumbo: Scripta Mater., 2003, 49, 651.

[11] V. Yamakov, D. Wolf, S.R. Phillpot and H. Gleiter: Scripta Mater., 2002, 50, 5005.

[12] G.E. Dieter: Mechanical Metallurgy, 3rd edn, McGraw-Hill, 1976.

[13] T. Mousavi, F. Karimzadeh and M.H. Abbasi: Mater. Sci. Eng. A, 2008, 487, 46.

[14] J.R. Groza, J.F. Shackelford, E.J. Lavernia and M.T. Powers: Materials Processing Hand Book, Taylor and Francis, 2007.

[15] H. Mehrer: Di®usion in Solids: Fundamentals, Methods, Materials, Di®usion Controlled Processes, Springer, 2007.

[16] H. Bakker, I.W. Modder and M.J. Kuin: Intermetallics, 1997, 5, 535.

[17] N. Gao and W.S. Lai: J. Phys.: Condens. Matter., 2007, 19, 1.

[18] L.M. Di, H. Bakker, P. Barczy and Z. Gacsi: Acta Metall. Mater., 1993, 41, 2923.

[19] J. Sheng: J. Mater. Sci. Lett., 2002, 21, 1319.

[20] E. Ma and M. Atzmon: J. Alloy. Compd., 1993, 194, 235.

[21] X. Cheng, Y. Ouyang, H. Shi, X. Zhong, Y. Du and X. Tao: J. Alloy. Compd., 2006, 421, 314.

[22] G. Ran, J.E. Zhou, S. Xi and P. Li: Mater. Sci. Eng. A, 2006, 416, 45.

[23] S. Xi, K. Zuo, X. Li, G. Ran and J. Zhou: Acta Mater., 2008, 56, 6050.

[24] R.A. Varin, T. Czujko and J. Mizera: J. Alloy. Compd., 2003, 350, 332.

[25] G.J. Van der Kolk, A.R. Miedema and A.K. Niessen: J. Less-Common Met., 1988, 145, 1.

[26] P.I. Loe® and A.W. Weeber: J. Less-Common Met., 1988, 140, 299.

[27] A.R. Miedema, F.R. de Boer and R. Boom: Calphad, 1977, 1, 341.

[28] A.R. Miedema: J. Less-Common Met., 1975, 41, 283.

[29] A.R. Miedema: J. Less-Common Met., 1976, 46, 67.

[30] A.W. Weeber: J. Phys. F: Met. Phys., 1987, 17, 809.

[31] L.C. Zhang, K.B. Kim, P. Yu, W.Y. Zhang, U. Kunz and J. Eckert: J. Alloy. Compd., 2007, 428, 157.

[32] E.A. Brands: Smithells Metals Reference Book, 6th edn, Butterworths, London, 1983.

[33] G.F. Zhou and H. Bakker: Mater. Trans., 1995, 36, 329.

[34] O. Kubaschewski and C.B. Alcock: Metallurgical Thermochemistry, 5th edn, Pergamon Press, 1979.

[35] D.L. Beke, H. Bakker and P.I. Loeff: Acta Metall. Mater., 1991, 39, 1267.

Thermodynamic Aspects of Nanostructured CoAl Intermetallic Compound During Mechanical Alloying

Thermodynamic Aspects of Nanostructured CoAl Intermetallic Compound during Mechanical Alloying

RichHTML

可视化

摘要/Abstract

引用本文

使用本文

参考文献

相关文章 0

编辑推荐

Metrics

本文评价