Oxygen grain boundary diffusion in titanium subhydrides studied by Auger electron spectroscopy

Conference · Wed Jan 01 04:00:00 EST 1986

OSTI ID:5428347

Wang, P S; Wittberg, T N; Wolf, J D; Keil, R G

Microstructural investigations have shown that some titanium subhydrides have fine grain sizes and thus high grain boundary densities. In the present paper, Auger Electron Spectroscopy (AES) depth profiling has been used in conjunction with Whipple's method to calculate oxygen grain boundary diffusivities in titannium subhydrides of various stoichiometries. At 600/sup 0/C, the grain boundary diffusivity, D/sub b/, for oxygen in both TiH/sub 0.3/ and TiH/sub 0.87/ was found to be given by ..cap alpha..D/sub b/delta = 7 x 10/sup -18/ cm/sup 3//sec where ..cap alpha.. is the solute segregation coefficient and delta is the grain boundary width. 9 refs., 4 figs.

• Research Organization: Monsanto Research Corp., Miamisburg, OH (USA). Mound; Dayton Univ., OH (USA)
• DOE Contract Number: AC04-76DP00053
• OSTI ID: 5428347
• Report Number(s): MLM-3379(OP); CONF-860739-18; ON: DE86014702
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360202* -- Ceramics
Cermets
& Refractories-- Structure & Phase Studies
45 MILITARY TECHNOLOGY, WEAPONRY, AND NATIONAL DEFENSE
450100 -- Military Technology
Weaponry
& National Defense-- Chemical Explosions & Explosives
AUGER ELECTRON SPECTROSCOPY
CHEMICAL REACTIONS
CRYSTAL STRUCTURE
DEHYDRIDATION
DIFFUSION
ELECTRON SPECTROSCOPY
ELEMENTS
GRAIN BOUNDARIES
HIGH TEMPERATURE
HYDRIDES
HYDROGEN COMPOUNDS
MICROSTRUCTURE
NONMETALS
OXYGEN
SPECTROSCOPY
TITANIUM COMPOUNDS
TITANIUM HYDRIDES
TRANSITION ELEMENT COMPOUNDS