Yongping Chen1, Yuankun Cen, Yunmao Liao. 1. Key Lab. for Oral Biomedical Engineering Ministry of Education, West China College of Stomatology, Sichuan University, Chengdu 610041, China.
Abstract
OBJECTIVE: To evaluate the mechanical properties and microstructure of a new dental full-ceramic material: alumina-zirconia nano-composite infiltrated ceramic. METHODS: The flexural strength was tested with three-point bending method and the fracture toughness with single edge notch bend (SENB) method. The composition of crystal phases in the infiltrated ceramic was analyzed by X-ray diffraction (XRD). The microstructure of the infiltrated ceramic was examined by scanning electronic microscope (SEM). RESULTS: The average three-point flexural strength of the material was (610.85 +/- 37.07) MPa and the average fracture toughness determined by SENB method was (6.51 +/- 1.38) MPa.m1/2. The main crystal phases in this composite ceramic were alpha-Al2O3 and TZP-ZrO2. CONCLUSION: Alumina-zirconia nano-composite infiltrated ceramic is a new infiltrated ceramic with favorable mechanical properties. It demonstrated a promising future for clinical application.
OBJECTIVE: To evaluate the mechanical properties and microstructure of a new dental full-ceramic material: alumina-zirconia nano-composite infiltrated ceramic. METHODS: The flexural strength was tested with three-point bending method and the fracture toughness with single edge notch bend (SENB) method. The composition of crystal phases in the infiltrated ceramic was analyzed by X-ray diffraction (XRD). The microstructure of the infiltrated ceramic was examined by scanning electronic microscope (SEM). RESULTS: The average three-point flexural strength of the material was (610.85 +/- 37.07) MPa and the average fracture toughness determined by SENB method was (6.51 +/- 1.38) MPa.m1/2. The main crystal phases in this composite ceramic were alpha-Al2O3 and TZP-ZrO2. CONCLUSION: Alumina-zirconia nano-composite infiltrated ceramic is a new infiltrated ceramic with favorable mechanical properties. It demonstrated a promising future for clinical application.