Nanostructured surface processing by an intense pulsed ion beam irradiation

Author

Yatsuzuka, M. ; Masuda, T. ; Hashimoto, Y. ; Yamasaki, T. ; Uchida, H. ; Nobuhara, S. ; Yoshihara, Y.

Author_Institution

Himeji Inst. of Technol., Hyogo, Japan

fYear

1997

fDate

19-22 May 1997

Firstpage

332

Abstract

Summary form only given, as follows. Metal surface modification by irradiating with an intense pulsed ion beam (IPIB) with short pulse width has been studied experimentally. An IPIB irradiation to a target leads to rapid heating above its melting point. After the beam is turned off, the heated region is immediately cooled by thermal conduction at a cooling rate of typically 10/sup 10/ K/s. This rapid cooling and resolidification results in generation of a nanostructured phase at the top of the surface. The typical hydrogen IPIB parameters are 200 kV of energy, 500 A/cm/sup 2/ of current density and 70 ns of pulsewidth. The IPIB was irradiated on pure titanium to generate a nanocrystalline phase. The IPIB-irradiated surface was examined with X-ray diffraction, SEM, and HR-TEM. The randomly oriented lattice fringes as well as a halo diffraction pattern are observed in the HR-TEM micrograph of IPTB-irradiated titanium. The average grain size is found to be 32 nanometers.

Keywords

X-ray diffraction; cooling; grain size; heat conduction; ion beam applications; ion beam effects; nanotechnology; scanning electron microscopy; surface structure; surface treatment; titanium; 200 kV; 32 nm; 70 ns; H; Ti; X-ray diffraction; average grain size; cooling rate; current density; halo diffraction pattern; heated region; high-resolution scanning electron microscopy; intense pulsed ion beam; intense pulsed ion beam irradiation; melting point; metal surface modification; nanocrystalline phase; nanostructured phase; nanostructured surface processing; pulsewidth; randomly oriented lattice fringes; rapid heating; resolidification; scanning electron microscopy; short pulse width; thermal conduction; Cooling; Current density; Energy resolution; Heating; Hydrogen; Ion beams; Space vector pulse width modulation; Thermal conductivity; Titanium; X-ray diffraction;

fLanguage

English

Publisher

ieee

Conference_Titel

Plasma Science, 1997. IEEE Conference Record - Abstracts., 1997 IEEE International Conference on

Conference_Location

San Diego, CA, USA

ISSN

0730-9244

Print_ISBN

0-7803-3990-8

Type

conf

DOI

10.1109/PLASMA.1997.605242

Filename

605242