Fracture Toughness Evaluation of Mullite(3Al2O32SiO2)Having Three Different Microstructures.

Fracture toughness of different PVD coatings

Indentat~on technque was used to characterize the mechanical properties (elastic modulus, hardness and toughness) both of PVD coatmgs and autocatallt~c chem~cal deposition ones. TIN and TiCN films m ere respectively depos~ted on a duple.: s t adess steel substrate using PVD technque. moreover a Nip films (P content about 8O6) and a NIPIB,C composite ones were used as comparison materials The ef...

Fracture toughness of graphene.

Perfect graphene is believed to be the strongest material. However, the useful strength of large-area graphene with engineering relevance is usually determined by its fracture toughness, rather than the intrinsic strength that governs a uniform breaking of atomic bonds in perfect graphene. To date, the fracture toughness of graphene has not been measured. Here we report an in situ tensile testi...

Fracture Toughness of Metal Castings

Fracture toughness measurement of dental ceramics using the indentation fracture method with different formulas.

This study examined fracture toughness (KIC) measurements obtained using the indentation fracture (IF) method with a view to improving their reliability. The KIC values of five dental ceramics were measured using the IF method with five different formulas, and the single-edge precracked beam (SEPB) method was used as a control. The elastic moduli of the dental ceramics were evaluated by dynamic...

Fracture toughness of locust cuticle.

Insect cuticle is one of the most common biological materials, yet very little is known about its mechanical properties. Many parts of the insect exoskeleton, such as the jumping legs of locusts, have to withstand high and repeated loading without failure. This paper presents the first measurements of fracture toughness for insect cuticle using a standard engineering approach. Our results show ...