Nanoscale stabilization of metastable phase: thermodynamic model and experimental studies

Song Xiao-Yan; Xu Wen-Wu; Zhang Zhe-Xu

doi:10.7498/aps.61.200510

Abstract

A thermodynamic model, into which the nanoscale effect is introduced, is established to describe the thermal parameters of metastable phase, as well as their changes with the concentration, temperature and grain size. Based on the model calculations and experiments, the thermodynamic properties and dependence on the grain size are disclosed. Taking the metastable SmCo7 phase for example, the conditions for the single-phase stability and the phase decomposition are studied. The results are important for the control of the phase stability and phase transformation of the metastable-phase alloy.

Keywords:

Authors and contacts

1.
College of Materials Science and Engineering, Key Laboratory of Advanced Functional Materials, Ministry of Education, Beijing University of Technology, Beijing 100124, China
Funds: Project supported by the National Basic Research Program of China (Grant No. 2011CB612207), the National Natural Science Foundation of China (Grant No. 51174009), and the Beijing Natural Science Foundation, China (Grant No. 2112006).

References

[1]	Song X Y, Gao J P, Zhang J X 2005 Acta Phys. Sin. 54 1313 (in Chinese) [宋晓艳, 高金萍, 张久兴 2005 54 1313]
[2]	Xu W W, Song X Y, Li E D, Wei J, Li L M 2009 Acta Phys. Sin. 58 3280 (in Chinese) [徐文武, 宋晓艳, 李尔东, 魏君, 李凌梅 2009 58 3280]
[3]	Fultz B 2010 Prog. Mater. Sci. 55 247
[4]	Wagner M 1992 Phys. Rev. B 45 635
[5]	Song X Y, Zhang J X, Li L M, Yang K Y, Liu G Q 2006 Acta Mater. 54 5541
[6]	Xu W W, Song X Y, Lu N D, Huang C 2010 Acta Mater. 58 396
[7]	Zhang Z X, Song X Y, Xu W W, Seyring M, Rettenmayr M 2010 Scr. Mater. 62 594
[8]	Lu X G, Selleby M, Sundman B 2005 Acta Mater. 53 2259
[9]	Meng Q, Zhou N, Rong Y, Chen S, Hsu T Y, Xu Z Y 2002 Acta Mater. 50 4563
[10]	Guo J G, Chen N X, Shen J 2006 J. Alloy Compd. 425 14
[11]	Barron T, Collins J, White G 1980 Adv. Phys. 29 609
[12]	Dinsdale A T 1991 Calphad 15 317
[13]	Zhang Z X, Song X Y, Xu W W 2011 Acta Mater. 59 1808
[14]	Cullity B D 1995 Elements of X-Ray Diffraction Addition (MA: Wesley Reading)

Cited By

[1]	Song X Y, Gao J P, Zhang J X 2005 Acta Phys. Sin. 54 1313 (in Chinese) [宋晓艳, 高金萍, 张久兴 2005 54 1313]
[2]	Xu W W, Song X Y, Li E D, Wei J, Li L M 2009 Acta Phys. Sin. 58 3280 (in Chinese) [徐文武, 宋晓艳, 李尔东, 魏君, 李凌梅 2009 58 3280]
[3]	Fultz B 2010 Prog. Mater. Sci. 55 247
[4]	Wagner M 1992 Phys. Rev. B 45 635
[5]	Song X Y, Zhang J X, Li L M, Yang K Y, Liu G Q 2006 Acta Mater. 54 5541
[6]	Xu W W, Song X Y, Lu N D, Huang C 2010 Acta Mater. 58 396
[7]	Zhang Z X, Song X Y, Xu W W, Seyring M, Rettenmayr M 2010 Scr. Mater. 62 594
[8]	Lu X G, Selleby M, Sundman B 2005 Acta Mater. 53 2259
[9]	Meng Q, Zhou N, Rong Y, Chen S, Hsu T Y, Xu Z Y 2002 Acta Mater. 50 4563
[10]	Guo J G, Chen N X, Shen J 2006 J. Alloy Compd. 425 14
[11]	Barron T, Collins J, White G 1980 Adv. Phys. 29 609
[12]	Dinsdale A T 1991 Calphad 15 317
[13]	Zhang Z X, Song X Y, Xu W W 2011 Acta Mater. 59 1808
[14]	Cullity B D 1995 Elements of X-Ray Diffraction Addition (MA: Wesley Reading)

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Catalog

Vol. 61, Issue 20 - 2012-10-20

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