Preparation of glass-infiltrated 3Y-TZP/Al2O3/glass composites
- Resource Type
- Authors
- Xiang-Jun Sheng; Zhihao Jin; Hui Xu; Yong-Lan Wang
- Source
- Materials Letters. 58:1750-1753
- Subject
- Materials science
Borosilicate glass
Mechanical Engineering
Sintering
Condensed Matter Physics
Dental porcelain
Fracture toughness
Flexural strength
Mechanics of Materials
Volume fraction
General Materials Science
Cubic zirconia
Composite material
Shrinkage
- Language
- ISSN
- 0167-577X
3Y-TZP/Al2O3/glass composites that contain Al2O3 were investigated to make all-ceramic dental porcelain with low shrinkage and good mechanical properties via a melt-infiltration process. 3Y-TZP/Al2O3 matrixes with densities ranging from 60% to 70% of theoretical were formed after partially sintering. The matrix was infiltrated with a lanthanum borosilicate glass at 1200 °C for 4 h three times. The dimensional change of composites is dependent on the Al2O3 content. The shrinkage of composites decreases with the Al2O3 content. During the infiltrating, zirconia's phase transformation was found. Bending strength and fracture toughness of glass-infiltrated composites are 449.6 MPa and 5.9 MPa m1/2, respectively, and are relatively sensitive to the volume fraction of Al2O3 and partially sintering temperature.