Effect of Y on cation and anion grain boundary diffusion in chromia

Conference · Mon Dec 31 23:00:00 EST 1990

OSTI ID:10157623

King, W E ^[1]; Park, J H ^[2]

---

1. Lawrence Livermore National Lab., CA (United States)
2. Argonne National Lab., IL (United States)

Cation and anion diffusivities in the lattice and along grain boundaries have been measured on sintered polycrystals of Cr{sub 2}O{sub 3} and Cr{sub 2}O{sub 3}-0.09 weight percent Y{sub 2}O{sub 3} at 1100 C and at the oxygen partial pressure corresponding to that of the Cr/Cr{sub 2}O{sub 3} equilibrium at that temperature. Results show the effect of Y is to enhance cation grain boundary diffusion. It was also observed that under the same conditions, anion diffusion is significantly faster than cation diffusion. Results are discussed in terms of their implications for the reactive element effect on high temperature oxidation of chromia forming alloys.

• Research Organization: Lawrence Livermore National Lab., CA (United States)
• Sponsoring Organization: USDOE, Washington, DC (United States)
• DOE Contract Number: W-7405-ENG-48
• OSTI ID: 10157623
• Report Number(s): UCRL-JC--106137; CONF-890977--3; ON: DE93013837
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360204
ANIONS
ATOM TRANSPORT
CATIONS
CHROMIUM OXIDES
DIFFUSION
DOPED MATERIALS
GRAIN BOUNDARIES
PHYSICAL PROPERTIES
POLYCRYSTALS
SINTERED MATERIALS
TEMPERATURE RANGE 1000-4000 K
YTTRIUM OXIDES