Surface Hardening by Nanoparticle Precipitation in Ni(Al,O) | Zendy

S. M. Myers | Zendy; D. M. Follstaedt | Zendy; J. A. Knapp | Zendy

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Surface Hardening by Nanoparticle Precipitation in Ni(Al,O)

Author(s) -

S. M. Myers,

D. M. Follstaedt,

J. A. Knapp

Publication year - 2001

Publication title -

osti oai (u.s. department of energy office of scientific and technical information)

Language(s) - English

Resource type - Reports

DOI - 10.2172/780314

Subject(s) - nanoindentation , materials science , transmission electron microscopy , hardening (computing) , precipitation hardening , microstructure , nanometre , non blocking i/o , precipitation , strengthening mechanisms of materials , metallurgy , ion , composite material , nanotechnology , layer (electronics) , chemistry , biochemistry , physics , meteorology , catalysis , organic chemistry

Ion implantation of O and Al were used to form nanometer-size precipitates of NiO or Al{sub 2}O{sub 3} in the near-surface of Ni. The yield strengths of the treated layers were determined by nanoindentation testing in conjunction with finite-element modeling. The strengths range up to {approximately}5 GPa, substantially above values for hard bearing steels. These results agree quantitatively with predictions of dispersion-hardening theory based on the precipitate microstructures observed by transmission electron microscopy. Such surface hardening by ion implantation may be beneficial for Ni components in micro-electromechanical systems

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