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Surface mass transport of alumina (1986)

Gaddipati, A. R. ; Scott, William D.

Springer

Journal of materials science 21 (1986), S. 419-423

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ISSN: 1573-4803

Source: Springer Online Journal Archives 1860-2000

Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics

Notes: Abstract The kinetics of thermal grooving at the intersection of rhombohedral twin boundaries with the $$(10\bar 10)$$ plane in aluminium oxide were measured from 1773 to 2273 K. Analysis of the data using the model of Mullins showed that surface diffusion was the dominant mechanism for mass transport. The results were compared with other similar published work on alumina, and the following equation for surface diffusion was determined: $$D_s (cm^2 sec^{ - 1} ) = 4.05 x 10^5 exp - (452kJ mol^{ - 1} /RT).$$

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1007/BF01145503

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