[A study on the mechanical properties and microstructure of Alumina-zirconia nano-composite infiltrated ceramic].
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.


CONCLUSIONS
Alumina-zirconia nano-composite infiltrated ceramic is a new infiltrated ceramic with favorable mechanical properties. It demonstrated a promising future for clinical application.
Chen
Yongping
Y
Key Lab. for Oral Biomedical Engineering Ministry of Education, West China College of Stomatology, Sichuan University, Chengdu 610041, China.
Cen
Yuankun
Y
Liao
Yunmao
Y
D000537:Aluminum Oxide / Q000737:chemistry*; D003764:Dental Materials / Q000737:chemistry; D003776:Dental Porcelain / Q000737:chemistry*; D003799:Dental Stress Analysis; D004548:Elasticity; D006244:Hardness; D008422:Materials Testing; D016876:Metal Ceramic Alloys / Q000737:chemistry; D008855:Microscopy, Electron, Scanning; D036103:Nanotechnology; D016062:Porosity; D013314:Stress, Mechanical; D015040:Zirconium / Q000737:chemistry*
D003764:Dental Materials; D016876:Metal Ceramic Alloys; D003776:Dental Porcelain; D015040:Zirconium; D000537:Aluminum Oxide; C028541:zirconium oxide