Active Oxidation of SiC. Jacobson, N. S. & Myers, D. L. Oxidation of Metals, 75(1):1–25, February, 2011. doi abstract bibtex Silicon carbide (SiC) forms a protective condensed-phase oxide (SiO2) in passive oxidation and a volatile sub-oxide (SiO(g)) in active oxidation. The transition between these two modes of oxidation and the rates of active oxidation are critical issues. A literature review indicates that impurity effects, the difference between active-to-passive and passive-to-active transitions, and the effect of total pressure on these transitions remain unexplored for SiC. Measurements were made in a thermogravimetric apparatus (TGA) by changing oxygen potentials either by blending O2/Ar mixtures or changing total pressures in a pure oxygen gas stream to the point where a transition occurs. Specimens were examined with standard optical and electron-optical techniques. Active-to-passive and passive-to-active transitions were measured and found to be similar for SiC, which is in contrast to pure Si. The similarity in SiC is attributed to SiC/SiO2 interfacial reactions producing the necessary conditions for passive scale formation (active-to-passive) or passive scale breakdown (passive-to-active). Comparable results were obtained in both the O2/Ar and reduced total O2 pressure cases for SiC.
@article{jacobson_active_2011,
title = {Active {Oxidation} of {SiC}},
volume = {75},
issn = {1573-4889},
doi = {10.1007/s11085-010-9216-4},
abstract = {Silicon carbide (SiC) forms a protective condensed-phase oxide (SiO2) in passive oxidation and a volatile sub-oxide (SiO(g)) in active oxidation. The transition between these two modes of oxidation and the rates of active oxidation are critical issues. A literature review indicates that impurity effects, the difference between active-to-passive and passive-to-active transitions, and the effect of total pressure on these transitions remain unexplored for SiC. Measurements were made in a thermogravimetric apparatus (TGA) by changing oxygen potentials either by blending O2/Ar mixtures or changing total pressures in a pure oxygen gas stream to the point where a transition occurs. Specimens were examined with standard optical and electron-optical techniques. Active-to-passive and passive-to-active transitions were measured and found to be similar for SiC, which is in contrast to pure Si. The similarity in SiC is attributed to SiC/SiO2 interfacial reactions producing the necessary conditions for passive scale formation (active-to-passive) or passive scale breakdown (passive-to-active). Comparable results were obtained in both the O2/Ar and reduced total O2 pressure cases for SiC.},
language = {en},
number = {1},
urldate = {2023-10-26},
journal = {Oxidation of Metals},
author = {Jacobson, N. S. and Myers, D. L.},
month = feb,
year = {2011},
keywords = {Active oxidation, Ceramics, Silicon carbide},
pages = {1--25},
}
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