Technique for Tensile Creep Testing of Ceramics <sup>†</sup>

Carroll, D. F.; Wiederhorn, Sheldon M.; Roberts, Donald E.

doi:10.1111/j.1151-2916.1989.tb06291.x

Cited by 76 publications

(20 citation statements)

References 9 publications

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“…3,12 To evaluate the grain size effect on creep, the specimens were annealed in the creep furnace at 1450°C to grow the grains under a low applied stress (<5 MPa). This was followed by immediate loading.…”

Section: Methodsmentioning

confidence: 99%

Improved tensile creep properties of yttrium- and lanthanum-doped alumina: a solid solution effect

et al. 2001

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The tensile creep behavior of yttrium-and lanthanum-doped alumina (at dopant levels below the solubility limit) was examined. Both compositions (100 ppm yttrium, 100 ppm lanthanum) exhibited a uniform microstructure consisting of fine, equiaxed grains. The creep resistance of both doped aluminas was enhanced, compared with undoped alumina, by about two orders of magnitude, which was almost the same degree of improvement as for materials with higher dopant levels (in excess of the solubility limit). In addition, measured creep rupture curves exhibited predominantly steady-state creep behavior. Our results, therefore, verified that the creep improvement in these rare-earth doped aluminas was primarily a solid-solution effect.

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Section: Methodsmentioning

confidence: 99%

Improved tensile creep properties of yttrium- and lanthanum-doped alumina: a solid solution effect

et al. 2001

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“…This specimen is a modification of a design by Wade et al 25 For tests lasting less than about 2000 h, we employed scanning laser extensometry for strain measurement. In this technique, 26,27 two SiC flags, clipped to the specimen and held by friction, define a nominally 14 to 18 mm gage length on the specimen. These flags interrupt a scanning laser beam of a commercial length measurement system (Zygo Model 1102, ZMike, Middlefield, CT, or LaserMike, ZMike, Dayton, OH), and their shadow falls on a detector.…”

Section: Methodsmentioning

confidence: 99%

Tensile Creep and Rupture of Silicon Nitride

Krause

Luecke

French

et al. 1999

Journal of the American Ceramic Society

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We have characterized the tensile creep, rupture lifetime, and cavitation behavior of a commercial, gas-pressuresintered silicon nitride in the temperature range 1150°to 1400°C and stress range 70 to 400 MPa. Individual creep curves generally show primary, secondary, and tertiary creep. The majority of the primary creep is not recoverable. The best representation of the data is one where the creep rate depends exponentially on stress, rather than on the traditional power law. This representation also removes the need to break the data into high and low stress regimes. Cavitation of the interstitial silicate phase accompanies creep under all conditions, and accounts for nearly all of the measured strain. These observations are consistent with a model where creep proceeds by the redistribution of silicate phase from cavitating interstitial pockets, accommodated by grain-boundary sliding of silicon nitride.

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“…The details of the processing routes can be found elsewhere 14 . Creep experiments were conducted in tension (loading direction perpendicular to the hot‐pressing axis) using a methodology similar to that followed by Carroll et al 15 …”

Section: Materials and Experimental Proceduresmentioning

confidence: 99%

Investigation of Anelastic Creep Recovery in SiC Whisker‐Reinforced Alumina Composites

Quan

Conlon

Wilkinson

2005

Journal of the American Ceramic Society

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Anelastic strain recovery has been studied in SiC whisker‐reinforced alumina composites following tensile creep. The magnitude of the recovered strains were ∼10−3 with 20 vol% SiC whiskers upon unloading from 74 MPa at 1673 K, while no such behavior was observed with 10 vol% SiC whiskers. A strain recovery mechanism based on Hertzian contact deformation within a percolating whisker (or particle) network is suggested, which appears to be consistent with the experimental observations. Two models (for whiskers and particles) have been developed which seem to predict the magnitude of recoverable strain reasonably well.

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Technique for Tensile Creep Testing of Ceramics ^†

Cited by 76 publications

References 9 publications

Improved tensile creep properties of yttrium- and lanthanum-doped alumina: a solid solution effect

Improved tensile creep properties of yttrium- and lanthanum-doped alumina: a solid solution effect

Tensile Creep and Rupture of Silicon Nitride

Investigation of Anelastic Creep Recovery in SiC Whisker‐Reinforced Alumina Composites

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Technique for Tensile Creep Testing of Ceramics †

Cited by 76 publications

References 9 publications

Improved tensile creep properties of yttrium- and lanthanum-doped alumina: a solid solution effect

Improved tensile creep properties of yttrium- and lanthanum-doped alumina: a solid solution effect

Tensile Creep and Rupture of Silicon Nitride

Investigation of Anelastic Creep Recovery in SiC Whisker‐Reinforced Alumina Composites

Contact Info

Product

Resources

About

Technique for Tensile Creep Testing of Ceramics ^†