Torsional Shear Strength Tests for Glass-Ceramic Joined Silicon Carbide...

A torsion test on hour-glass-shaped samples with a full joined or a ring-shaped joined area was chosen to measure shear strength of glass-ceramic joined silicon carbide. Shear strength of about 100 MPa was measured for full joined SiC with fracture completely inside their joined area. Attempts to obtain this shear strength with a ring-shaped joined area failed due to mixed mode fractures. On the contrary, full joined and ring-shaped steel hour-glasses joined by a glass-ceramic gave the same shear strength, thus suggesting that this test measures shear strength of joined components only when their fracture is completely inside their joined area.