KEM 2009 DOI: 10.4028/www.scientific.net/kem.409.176 View full text
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Walter Harrer, Robert Danzer, Peter Supancic, Tanja Lube

Abstract: The ball-on-three-balls (B3B)-test is a biaxial strength test for brittle materials. The results of B3B-tests are very stable against small geometrical inaccuracies of the specimens or the test support. In contrast to conventional bending tests there exists only a small influence of friction and edge defects are not relevant. These advantages, compared to beam tests, make the testing of mini-specimens with volumes of a few mm3 feasible. For this investigation silicon nitride specimens of different sizes were t…

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