Hostname: page-component-78c5997874-xbtfd Total loading time: 0 Render date: 2024-11-10T16:12:32.714Z Has data issue: false hasContentIssue false
  • English
  • Français

Incontinuous Grain Growth in Pure Co Nanocrystalline Powders Prepared by Mechanical Attrition

Published online by Cambridge University Press:  03 March 2011

Xiaoyan Song ,
Jiuxing Zhang  and
Keyong Yang
Xiaoyan Song
Affiliation:
College of Materials Science and Engineering, The Key Lab of Functional Materials of the Education Ministry, Beijing University of Technology, Beijing 100022, People’s Republic of China
Jiuxing Zhang
Affiliation:
College of Materials Science and Engineering, The Key Lab of Functional Materials of the Education Ministry, Beijing University of Technology, Beijing 100022, People’s Republic of China
Keyong Yang
Affiliation:
College of Materials Science and Engineering, The Key Lab of Functional Materials of the Education Ministry, Beijing University of Technology, Beijing 100022, People’s Republic of China
Get access

Abstract

Highly pure Co nanocrystalline powders were prepared by high-energy ball milling under the condition that all operations on the powders were performed in the glovebox filled with highly purified argon gas. A series of annealing experiments at different temperatures were carried out to investigate grain growth in the milled powders. The as-milled and annealed microstructures were observed and analyzed with transmission electron microscopy (TEM), high-resolution TEM, high-resolution scanning electron microscopy, and x-ray diffraction methods. Characteristics of the incontinuous grain growth in the milled nanocrystalline powders were found. It is considered by the authors that the sharp increase in nanograin size in certain intermediate-temperature region is a result of accelerated grain growth promoted by the stored energy as a supplied driving force, and through a particular dominant mechanism of nanograin rotations in contrast to grain boundary migration in polycrystalline materials.

Keywords

Grain boundariesGrain growthNanoscale
Type
Articles
Information
Journal of Materials Research , Volume 20 , Issue 11 , November 2005 , pp. 3054 - 3060
Copyright
Copyright © Materials Research Society 2005

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

REFERENCES

1Koch, C.C.: Synthesis of nanostructured materials by mechanical milling: Problems and opportunities. Nanostruct. Mater 9, 13 (1997).CrossRefGoogle Scholar
2Tian, H.H. and Atzmon, M.: Kinetics of microstructure evolution in nanocrystalline Fe powder during mechanical attrition. Acta Mater. 47, 1255 (1999).CrossRefGoogle Scholar
3Gleiter, H.: Nanostructured materials: Basic concepts and microstructure. Acta Mater 48, 1 (2000).CrossRefGoogle Scholar
4Tjong, S.C. and Chen, H.: Nanocrystalline materials and coatings. Mater. Sci. Eng., R 45, 1 (2004).CrossRefGoogle Scholar
5Malow, T.R. and Koch, C.C.: Grain growth in nanocrystalline iron prepared by mechanical attrition. Acta Mater 45, 2177 (1997).CrossRefGoogle Scholar
6Zuo, B., Saraswati, N., Sritharan, T. and Hng, H.H.: Production and annealing of nanocrystalline Fe–Si and Fe–Si–Al alloy powders. Mater. Sci. Eng., A 371, 210 (2004).CrossRefGoogle Scholar
7Klug, H.P. and Alexander, L.E.: X-Ray Diffraction Procedures for Polycrystalline and Amorphous Materials , 2nd ed. (John Wiley & Sons, New York, 1974), p. 618.Google Scholar
8Rock, C. and Okazaki, K.: Grain growth kinetics and thermal stability in a nanocrystalline multiphase mixture prepared by low-energy ball milling. Nanostruct. Mater. 5, 657 (1995).CrossRefGoogle Scholar
9Revesz, A., Ungar, T., Borbely, A. and Lendvai, J.: Dislocations and grain size in ball-milled iron powder. Nanostruct. Mater. 7, 779 (1996).CrossRefGoogle Scholar
10Ohsaki, S., Hono, K., Hidaka, H. and Takaki, S.: Characterization of nanocrystalline ferrite produced by mechanical milling of pearlitic steel. Scripta Mater 52, 271 (2005).CrossRefGoogle Scholar
11Zhou, F., Liao, X.Z., Zhu, Y.T., Dallek, S. and Lavernia, E.J.: Microstructural evolution during recovery and recrystallization of a nanocrystalline Al-Mg alloy prepared by cryogenic ball milling. Acta Mater 51, 2777 (2003).CrossRefGoogle Scholar
12Haslam, A.J., Phillpot, S.R., Wolf, D., Moldovan, D. and Gleiter, H.: Mechanisms of grain growth in nanocrystalline fcc metals by molecular-dynamics simulation. Mater. Sci. Eng., A 318, 293 (2001).CrossRefGoogle Scholar
13Huang, J.Y., Wu, Y.K., Ye, H.Q. and Lu, K.: Allotropic transformation of cobalt induced by ball milling. Nanostruct. Mater. 6, 723 (1995).CrossRefGoogle Scholar
14Zhao, Y.H., Lu, K. and Zhang, K.: Microstructure evolution and thermal properties in nanocrystalline Cu during mechanical attrition. Phys. Rev. B 66, 1 (2002).CrossRefGoogle Scholar
15Song, X.Y., Gao, J.P. and Zhang, J.X.: Thermodynamic functions of nanocrystals and its application to the study of phase transformations. Acta Phys. Sinica 54, 1313 (2005).CrossRefGoogle Scholar
16Liu, K.W. and Muecklich, F.: Thermal stability of nano-RuAl produced by mechanical alloying. Acta Mater 49, 395 (2001).CrossRefGoogle Scholar
17Kirchheim, R.: Grain coarsening inhibited by solute segregation. Acta Mater. 50, 413 (2002).CrossRefGoogle Scholar