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Characteristics of the mechanically-alloyed Ni60Ti40 amorphous powders during mechanical milling in different atmospheres

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Abstract

Mechanically alloyed Ni60Ti40 amorphous powders were further milled in argon, nitrogen and oxygen atmospheres. X-ray diffraction, differential scanning calorimetry and transmission electron microscopy analyses were made to investigate the structural changes during each process. No distinguishable structural changes during further milling of the amorphous powders in argon or nitrogen atmospheres were observed. However, in an oxygen atmosphere, the amorphous phase was crystallized into intermetallic compounds and was accompanied by the occurrence of titanium oxides in the initial stage. On further milling in an oxygen atmosphere, the intermetallic compounds decomposed and only the nickel saturation solution and titanium oxides remained. A thermodynamic explanation of the crystallization and decomposition has been proposed.

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Author notes

  1. K. Y. Wang

    Present address: State Key Laboratory of Advanced Metal materials, University of Science and Technology Beijing, 100083, Beijing, People's Republic of China

Authors and Affiliations

  1. State Key Laboratory of RSA, Institute of Metal Research, Academia Sinica, 110015, Shenyang, People's Republic of China

    K. Y. Wang, T. D. Shen, J. T. Wang & M. X. Quan

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  1. K. Y. Wang
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  2. T. D. Shen
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  3. J. T. Wang
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  4. M. X. Quan
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Wang, K.Y., Shen, T.D., Wang, J.T. et al. Characteristics of the mechanically-alloyed Ni60Ti40 amorphous powders during mechanical milling in different atmospheres. J Mater Sci 28, 6474–6478 (1993). https://doi.org/10.1007/BF01352216

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  • DOI: https://doi.org/10.1007/BF01352216

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