Microstructure and properties of TiB/sub 2/ implanted with 1-MeV nickel

Conference · Sat Jan 01 04:00:00 EST 1983

OSTI ID:6264562

McHargue, C J; Sklad, P S

Polycrystalline samples of TiB/sub 2/ were implanted at ambient temperatures with 1-MeV Ni/sup +/ ions to a fluence of 1 x 10/sup 17/ ions/cm/sup 2/. This fluence corresponds to a calculated nickel-to-titanium ratio, within the half width of the ion distribution, of approximately 0.12. Analytical electron microscopy was used to study the resultant microstructure. The starting microstructure was modified to a depth of approximately 750 nm, significantly deeper than the calculated peak in the deposited nickel profile of 389 nm. The results also show a change in the character of the microstructure, from one exhibiting a moderate density of tangled dislocations to a high density of small defects, as well as a change in the concentration of nickel as a function of depth from the implanted surface. There was no evidence of nickel precipitation. Surface mechanical properties such as hardness and wear resistance were significantly increased.

• Research Organization: Oak Ridge National Lab., TN (USA)
• DOE Contract Number: W-7405-ENG-26
• OSTI ID: 6264562
• Report Number(s): CONF-830573-2; ON: DE83014020
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360206* -- Ceramics
Cermets
& Refractories-- Radiation Effects
BORIDES
BORON COMPOUNDS
CHARGED PARTICLES
CRYSTAL DEFECTS
CRYSTAL STRUCTURE
DISLOCATIONS
ELECTRON MICROSCOPY
HARDNESS
ION IMPLANTATION
IONS
LINE DEFECTS
MECHANICAL PROPERTIES
MICROSCOPY
MICROSTRUCTURE
NICKEL IONS
TITANIUM BORIDES
TITANIUM COMPOUNDS
TRANSITION ELEMENT COMPOUNDS
WEAR RESISTANCE