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

DE2001780314

Publication Date	2001
Personal Author	Myers, S. M.; Follstaedt, D. M.; Knapp, J. A.
Page Count	9
Abstract	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.
Keywords	Ion implantation Precipitation Surface hardening Nickel Bearings Dispersion hardening Steels Testing Transmission electron microscopy Yield strength
Source Agency	Technical Information Center Oak Ridge Tennessee
Corporate Authors	Sandia National Labs., Albuquerque, NM.; Department of Energy, Washington, DC.
Document Type	Technical Report
NTIS Issue Number	200125
Contract Number	AC04-94AL85000

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

Surface Hardening by Nanoparticle Precipitation in Ni(Al,O).
DE2001780314

Publication Date	2001
Personal Author	Myers, S. M.; Follstaedt, D. M.; Knapp, J. A.
Page Count	9
Abstract	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.
Keywords	Ion implantation Precipitation Surface hardening Nickel Bearings Dispersion hardening Steels Testing Transmission electron microscopy Yield strength
Source Agency	Technical Information Center Oak Ridge Tennessee
Corporate Authors	Sandia National Labs., Albuquerque, NM.; Department of Energy, Washington, DC.
Document Type	Technical Report
NTIS Issue Number	200125
Contract Number	AC04-94AL85000