Strength Evaluation Test of Pressureless-sintered SiC and Reaction-sintered Si&lt;sub&gt;3&lt;/sub&gt;N&lt;sub&gt;4&lt;/sub&gt; at Room Temperature

MATSUSUE, Katsutoshi; TAKAHARA, Kitao; Hashimoto, Ryosaku

doi:10.2109/jcersj1950.90.1041_280

Cited by 5 publications

(3 citation statements)

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“…Tensile test [30][31][32][33][34], rotating disc test [31], ring compression test [3, 32,35] and ring expansion test [36][37][38] [36]. For comparison, the dashed straight lines as seen in Figs.…”

Section: Effects Of Specimen Geometry and Stress State On Strengthmentioning

confidence: 99%

“…The effect of specimen size on strength was investigated by bending test of various materials [4,6,26,31,32,37,39], ring expansion test of a reaction-bonded silicon nitride [36], and sphere compression test of a soda lime silica [40]. A typical result in 4-point bending test of an alumina is shown in Fig.…”

Section: Effects Of Specimen Geometry and Stress State On Strengthmentioning

confidence: 99%

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Strength Characteristics of Structural Ceramics

Hoshide

1996

Journal of the Society of Materials Science, Japan

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In structural ceramics, a remarkable scatter of strength is observed due to brittle behavior in deformation and flaws unavoidably formed during material processing. Therefore, information on strength characteristics of ceramics is required for the mechanical design in their applications to high-performance components. In the present paper, the strength properties of typical ceramics are reviewed from statistical aspects, especially. As for the static strength, general features of ceramic strength are first outlined, and then several factors affecting strength, such as environments, specimen geometry, stress state and machining, are described. The fatigue strength is reviewed in two categories of the static and cyclic fatigue. As one of screening procedures to exclude components with a lower strength, the proof testing in ceramics is described and the problems in the testing are also mentioned.

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Section: Effects Of Specimen Geometry and Stress State On Strengthmentioning

confidence: 99%

Section: Effects Of Specimen Geometry and Stress State On Strengthmentioning

confidence: 99%

Strength Characteristics of Structural Ceramics

Hoshide

1996

Journal of the Society of Materials Science, Japan

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“…It has been reported that the shape and/or size of specimen and the loading mode affect strength characteristics in ceramic materials [1][2][3][4][5][6][7][8][9][10][11][12]. For successful applications of ceramics to engineering components, strength characteristics of notched components with an appropriate procedure to estimate them should be also investigated in the relation to the well-known size effect [13].…”

Section: Introductionmentioning

confidence: 99%

Evaluation of Bending Strength Affected by Specimen Geometry in Silicon Nitride

Hoshide

Sano

Honda

1997

Journal of the Society of Materials Science, Japan

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Four-point bending tests of a gas pressure sintered silicon nitride were conducted using notched specimens with different notch shapes as well as smooth specimens of distinct sizes, and the effect of the specimen geometry on the bending strength was experimentally clarified. The mean strength in smooth specimens could be almost correlated with the effective volume, though the mean strength in notched specimens shifted toward the lower strength side compared with the relation for smooth specimens. From observation of fracture surface, no unique correlation of the strength with the effective volume was suggested to be ascribed to a difference in flaw morphology between smooth and notched specimens. To discuss the efficiency of the effective volume, a Monte Carlo simulation was also carried out by assuming the same distribution characteristics of cracks in a material. The simulated result revealed that the effect of the specimen geometry on the strength was explained by using the effective volume. The effective volume, however, was found to be inefficient because of a failure of the primitive assumption in the Weibull theory when the flaw density was extremely low in a material.

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