The conclusion is that the influence of component on three-point bending strength of specimen is remarkable. Three-point bending strength of specimen ranges from 167. 4MPa to 602. 9MPa. Three-point bending strength of Ti/15W reaches 602.9MPa.
Methods Three-point bending strength, fracture toughness and surface toughness were measured, and then Milling index (M) was calculated. The copings of mandibular first premolar were made by MC machinable ceramic and Vita In-Ceram Alumina Block with Type Ⅱ Cerec CAD/CAM machine.
The experimental results showed that a reliable Si_3N_4/40CrMo joint could be obtained by adopting AgCuTi-Pd5% (at.%) as filler meter. When the sample was brazed at 1193K for 30 min, the three-point bending strength of the joint was 352.3MPa.
The density, bending strength and fracture toughness of the partially sintered alumina and alumina glass composite were determined. The results indicated that the porous alumina density was 2.12g/cm 3, the three point bending strength 102MPa, the fracture toughness 1 61 MPam 1/2 ;
The results indicated:porous alumina density was 2. 12g/ cm3, three point bending strength was 102MPa,fracture toughness was 1. 61MPam1/2, alumina - glass composite density 3. 85g/cm3,three point bending strength was 385MPa.
SiC/BN laminated composites with three point bending strength and nominal fracture toughness of 729.86±114.02 MPa and 20.58± 2.77 MPa·m 1/2 respectively are obtained. The main mechanism of enhancing toughness is attributed to crack bluntness, crack deflexion, crack parallel propagation and pull_out of matrix layer.
The composite containing 7wt% TiC had the optimum three-point bending strength of 842 MPa, which was 200 MPa greater than that of the unreinforced γ-TiAl intermetallic.
Even the control group, without addition of rhBMP-2 to the rods, demonstrated significantly increased three-point bending strength at 9 weeks compared with that before implantation.
A ceramic material with a mean density of 4.01 g/cm3, three-point bending strength 380 ±20 MPa, a size of corundum crystal equal to 4 - 6 μm, and zero open porosity is obtained, which can be used in endoprostheses caps for coxofemoral joints.
The decrease in the interlaminar shear strength corresponds to that in the three-point bending strength.
Since the longitudinal three-point bending strength decreases with the increase of iron content, it was concluded that the α-phase inclusions on the surface of the fibre contribute to the lower strength of the composites based on this alloy.