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    Amorphization and ultrafine-scale recrystallization in shear bands formed in shock-consolidated Pr₂Fe₁₄B/α -Fe nanocomposite magnets

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    2004_04_APL_7.pdf (453.8Kb)
    Date
    2004-09-20
    Author
    Wang, Z. L. (Zhong Lin)
    Jin, Z. Q.
    Liu, J. Ping
    Thadhani, Naresh N.
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    Abstract
    Amorphization and ultrafine-scale recrystallization within shear bands formed in shock-consolidated Pr₂Fe₁₄B/α -Fe nanocomposite magnetic powder compacts have been observed using transmission electron microscopy. The shear bands span through multiple grain lengths and truncate preexisting ~25 nm hard and soft magnetic phase grains, resulting in further grain size refinement. The shear bands contain nanocrystallites (<10 nm size) interdispersed in an amorphous matrix, which suggests the occurrence of shock-induced phase transition in localized regions of the shear bands, and provides insight into the process of deformation of nanocrystalline materials under coupled high-strain-rate and high-pressure conditions.
    URI
    http://hdl.handle.net/1853/27083
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    • Center for Nanoscience and Nanotechnology Publications [105]

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