Cyclic fatigue behavior of Si3N4 ceramics

Fracture of Ceramics

“…[43,[103][104][105][106] A rare exception is the data of NGK Insulators Ltd. on their silicon nitride material. [107] It follows from the reported cyclic fatigue data that there also exists a Paris law for cyclic fatigue crack growth. The crack growth per load cycle is…”

High Temperature Engineering Ceramics

“…shows the results of cyclic fatigue tests at room temperature, in which tensile specimens and tapered cantilever beam specimens of sintered silicon nitrides were used (Masuda et al, 1990 limit of both specimens with different volumes seem to be the same. Cyclic fatigue strength at elevated temperatures is described next.…”

“…10-43 suggests a decrease in the fatigue limit to about 40% of its initial strength. Figure 10-45 shows the mean stress/ stress amplitude diagram of sintered silicon nitrides (Masuda et al 1990). a t on the horizontal axis represents the mean tensile strength of 6 mm diameter button-head type specimens.…”

Probabilistic Constant Fatigue Life Diagrams for Ceramics

“…The stress amplitude -the number of cycles to failure curves were then predicted for (10) . この理論に基づき，種々のセラミックスを用いた様々 な破壊試験を通して，S- （ ：応力速度）線図，S-N 線図および S-t 線図の予測や SCG パラメータの評価が行 (21) .…”