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

Myers, S. M. ; Follstaedt, D. M. ; Knapp, J. A.

Technical Information Center Oak Ridge Tennessee

关键词: Ion implantation;    Precipitation;    Surface hardening;    Nickel;    Bearings;   

RP-ID  :  DE2001780314

学科分类：工程和技术（综合）

美国|英语

来源: National Technical Reports Library

【 摘 要 】

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.