Flexural strength and modulus elasticity of silicon nitride (Si3N4) rectangular bars were evaluated using 3-point bending tests with a total distance between bottom supports of 40 mm. Test parameters and results are assembled in the Table. Force and deflection were shown at the fracture of the sample. All tests showed a linear elastic response. With help of Microsoft Excel calculate modulus (in GPa) and flexural strength (in MPa) for every test, their mean values, standard deviations, and relative errors of flexural strength and modulus

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