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The 3 mol% yttria stabilized tetragonal zirconia polycrystals (3Y-TZP) powder had three particle size distributions, while the fine one was lower than 100 nm. The 3Y-TZP compact was prepared by dry-pressing under pressures ranged from 10 to 30 MPa and then presintered at 1250 ℃ for 2 h. The matrix dry-pressed under the pressure of 20 MPa had a porosity of 16.7% and could be easily processed by computer aided design and computer aided manufacturing (CAD/ CAM), and which had been infiltrated by the La2O3-Al2O3-SiO2 glass at 1200 ℃ for 4 h. The flexural strength and fracture toughness of the composite were 710.7 MPa and 6.51 MPa m1/2, respectively. The low shrinkage (0.3%) of the composite can satisfy the net-shape fabrication standard. XRD results illustrated that zirconia in the La2O3-Al2O3-SiO2 glass-infiltrated 3Y-TZP all-ceramic composite was mainly in the tetragonal phase. SEM and EDS results indicated that the pores of the matrix were almost filled by the La2O3-Al2O3-SiO2 glass.
The 3 mol% yttria stabilized tetragonal zirconia polycrystals (3Y-TZP) powder had three particle size distributions, while the fine one was lower than 100 nm. The 3Y-TZP compact was prepared by dry-pressing under pressures ranged from 10 to 30 MPa and then presintered at 1250 ° C for 2 h. The matrix dry-pressed under the pressure of 20 MPa had a porosity of 16.7% and could be easily processed by computer aided design and computer aided manufacturing (CAD / CAM), and which had been The infiltrated by the La2O3-Al2O3-SiO2 glass at 1200 ° C for 4 h. The flexural strength and fracture toughness of the composite were 710.7 MPa and 6.51 MPa m1 / 2, respectively. The low shrinkage (0.3%) of the composite can satisfy the XRD results illustrated that the zirconia in the La2O3-Al2O3-SiO2 glass-infiltrated 3Y-TZP all-ceramic composite was mainly in the tetragonal phase. SEM and EDS results indicated that the pores of the matrix were almost filled by the La2O3-Al2O3-SiO2 glass .