Corrosion of Ceramic Materials

Opila, Elizabeth J.; Jacobson, Nathan

doi:10.1002/9783527619306.ch16

Cited by 7 publications

(5 citation statements)

References 168 publications

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“…In this case, the supply of O 2 to the SiC/SiO 2 interface is less than that required in order to continue the oxidation of the SiC substrate. Under these conditions, it is probable that the reaction 1,2,25 SiC( s )+2SiO 2 ( s )→3SiO( g )+CO( g ) takes place at the SiC/SiO 2 interface. An analogous reaction, 26 i.e., Si( s )+SiO 2 ( s )→2SiO( g ), occurs for SiO 2 films on Si.…”

Section: Resultsmentioning

confidence: 99%

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Effects of Low‐Pressure Oxidation on the Surface Composition of Single Crystal Silicon Carbide

Song

Smith

2005

Journal of the American Ceramic Society

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We report on thermodynamic modeling and experimental studies of the reaction of oxygen with the 4H-and 6H-SiC surfaces at high temperatures T. It is observed that this reaction leads to the growth of passivating SiO 2 layers at high pressures P(O 2 ), etching of the surface at lower P(O 2 ), and enhancement of the surface segregation of carbon at still lower P(O 2 ). A unified P(O 2 )-T phase diagram for the reaction of O 2 with SiC is presented and a thermodynamic model predicting these three distinct reaction regions is described. Evidence for the thermal decomposition of the SiO 2 layer due to its reaction with the SiC substrate is also presented. J ournal

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Section: Resultsmentioning

confidence: 99%

“…I t is well‐known that the thermal oxidation of SiC can lead to the passivation of its surface by an SiO 2 layer, a fact that plays a critical role in its use as a high‐temperature ceramic material 1,2 . Because of the presence of carbon, the oxidation of SiC is chemically much more complex than, for example, that of Si.…”

Section: Introductionmentioning

confidence: 99%

Effects of Low‐Pressure Oxidation on the Surface Composition of Single Crystal Silicon Carbide

Song

Smith

2005

Journal of the American Ceramic Society

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“…10 In most cases, the presence of water vapor at high temperature leads to rapid degradation of ceramic materials. In this issue, Opila et al have provided an extensive treatment on the stability of oxide ceramics in a hightemperature water vapor environment.…”

Section: Desaimentioning

confidence: 99%

Materials for high-temperature protection

Desai¹

2006

JOM

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“…Even ceramics can undergo degradation by selective dissolution. Like death and taxes, corrosion is something we hope to avoid; but ultimately it is something we must learn to deal with [2]. The fundamental cause or driving force for all corrosion is the lowering of a system's Gibbs energy [3].…”

Section: Introductionmentioning

confidence: 99%

Inhibiting Effect of Dioctyl Phthalate on the Corrosion of Mild Steel in 1.0 M Hydrochloric Acid Solution

Emmanuel¹,

Nwufo²,

Ekwenchi³

2018

OALib

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Steel corrosion is a major and costly problem to industrialists and construction workers. The inhibiting effect of dioctyl phthalate on the corrosion of mild steel was carried out in 1.0 M solution of HCl as the corrosion medium using the weight loss method. The adsorption of the dioctyl phthalate on the surface of the mild steel in 1.0 M HCl was found to follow the physisorption mechanism and also follow the first order rate law. The corrosion rate was found to be directly proportional to the temperature of the medium, and inversely proportional to the concentration of the inhibitor in solution. The activation energy increases with increase in the concentration of the inhibitor. Values of standard free energy change, o ads G ∆ are consistently below −20 kJmol −1. This solidly established that the adsorption mechanism of the dioctyl phthalate on mild steel surface is physisorption. Langmuir and Freundlich adsorption isotherms were used, with Freundlich isotherm as best fit for the modelling of the adsorption process. The value n F in Freundlich isotherm which, indicates the intensity of adsorption, was found to be in the average of 0.717 not far from the typical value of 0.6 n F .

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Corrosion of Ceramic Materials

Cited by 7 publications

References 168 publications

Effects of Low‐Pressure Oxidation on the Surface Composition of Single Crystal Silicon Carbide

Effects of Low‐Pressure Oxidation on the Surface Composition of Single Crystal Silicon Carbide

Materials for high-temperature protection

Inhibiting Effect of Dioctyl Phthalate on the Corrosion of Mild Steel in 1.0 M Hydrochloric Acid Solution

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