Impact strength of ceramics.

Strength of Polycrystalline Ceramics under Shock Compression

Flexural strength of veneering ceramics for zirconia.

OBJECTIVES The flexural strengths of veneering ceramics for zirconia were compared. METHODS With 10 different veneering ceramics for zirconia (test group) and three different veneering ceramics for the metal-ceramic technique (control group) three-point flexural strength and biaxial flexural strength according to ISO 6872: 1995 as well as four-point flexural strength according to EN 843-1: 20...

Laminar Ceramics That Exhibit a Threshold Strength.

Thin compressive layers within a laminar ceramic arrest large cracks (surface and internal) and produce a threshold strength. This phenomenon increases the damage tolerance of ceramics and will allow engineers to design reliable ceramic components for structural applications. The stress intensity factor derived for a crack sandwiched between two compressive layers suggests that the threshold st...

Effect of Thermal and Mechanical Aging on Flexural Strength of Zirkonzahn and Mamut Zirconia Ceramics

  Objective: Despite the high strength of zirconia restorations, aging in the oral environment and masticatory loading may result in transformation of tetragonal to monoclinic phase and decrease their strength. Statements in this regard are controversial. This study sought to compare the flexural strength (FS) of Zirkonzahn (ZirkonZahn, Cercon, Ceramill) and Mamut (Dubai Medical Equipment LLC, ...

Computer studies of the dynamic strength of ceramics (II)

Our previous constitutive model for fully dense ceramics has been extended to include A1203 (AD999) and Si3N4; there are now parameters for seven materials. New experimental data, such as spall and double-shock wave-profiles for SiC and B4C, have been successfully simulated. Additional experiments are proposed which should help elucidate the remaining problems.