Electron microscopic observations of microcracking about indentations in aluminum oxide and silicone carbide

Hockey, B. J.; Lawn, Brian R.

doi:10.6028/nbs.ir.75-658

1975

DOI: 10.6028/nbs.ir.75-658

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Electron microscopic observations of microcracking about indentations in aluminum oxide and silicone carbide

B. J. Hockey¹,

Brian R. Lawn²

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1976

1977

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References 12 publications

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Controlled Surface Flaws in Hot‐Pressed SiC

Petrovic

Jacobson²

1976

Journal of the American Ceramic Society

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Controlled semi-elliptical surface flaws were produced in hotpressed SIC by Knoop microhardness indentation. Flawed specimens were placed in 4-point bending in order to determine their critical stress intensity factor, Klc, at both room and high temperatures. Room-temperature fracture and K l c values after annealing were sensitive to the annealing environment; this behavior correlated with the active/passive nature of the oxidation process. Flaw healing was observed for annealing exposures in air. Room-temperature K l c values increased with increasing annealing temperature. High-temperature K l c values decreased with increasing temperature as a result of a decrease in the fracture surface energy.

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Controlled Surface Flaws in Hot‐Pressed SiC

Petrovic

Jacobson²

1976

Journal of the American Ceramic Society

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Fracture Toughness of Single‐Crystal Silicon Carbide

Henshall¹,

Rowcliffe²,

Edington³

1977

Journal of the American Ceramic Society

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Electron microscopic observations of microcracking about indentations in aluminum oxide and silicone carbide

Cited by 2 publications

References 12 publications

Controlled Surface Flaws in Hot‐Pressed SiC

Controlled Surface Flaws in Hot‐Pressed SiC

Fracture Toughness of Single‐Crystal Silicon Carbide

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