Digitale Medien
Westerville, Ohio
:
American Ceramics Society
Journal of the American Ceramic Society
85 (2002), S. 0
ISSN:
1551-2916
Quelle:
Blackwell Publishing Journal Backfiles 1879-2005
Thema:
Maschinenbau
,
Physik
Notizen:
This paper reports the transport kinetics of Mg in cubic yttria-stabilized zirconia (containing 10% mol of Y2O3 (10YSZ)) involving the bulk and the grain boundary diffusion coefficients. The diffusion-controlled concentration profiles of Mg were determined using secondary ion mass spectrometry (SIMS) in the range 1073–1273 K. The determined bulk diffusion coefficient and the grain boundary diffusion product may be expressed as the following functions of temperature, respectively: D= 5.7 exp[(−390 kJ/mol)/RT] cm2·s−1 and D′αδ= 3.2 × 10−15 exp[(−121 kJ/mol)/RT] cm3·s−1, where α is the segregation enrichment factor and δ is the boundary layer thickness. The grain boundary enhancement factor decreases with temperature from 105 at 1073 K to 103 at 1273 K.
Materialart:
Digitale Medien
URL:
http://dx.doi.org/10.1111/j.1151-2916.2002.tb00442.x
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