Properties of ZrO2–Al2O3 composite as a function of isothermal holding time
作者： J.K.M.F. Daguano , C. Santos , R.C. Souza , R.M. Balestra , K. Strecker
DOI: 10.1016/J.IJRMHM.2006.12.005
关键词: Cubic zirconia 、 Materials science 、 Sintering 、 Toughness 、 Grain growth 、 Composite material 、 Composite number 、 Microstructure 、 Ceramic 、 Fracture toughness
摘要: Abstract Zirconia and alumina based ceramics present interesting properties for their application as implants, such biocompatibility, good fracture resistance, well high toughness hardness. In this work the influence of sintering time on a ZrO 2 –Al O 3 composite material, containing 20 wt% Al , has been investigated. The ceramic composites were obtained by sintering, in air, at 1600 °C times between 0 1440 min. Sintered samples characterized microstructure crystalline phases, mechanical properties. grain growth exponents, n 2.8 4.1, respectively, indicating that different mechanisms are responsible each phase. After 1600 °C, material exhibited dependency hardness function time, with values 1500 HV (120 min) 1310 HV (1440 min) 8 MPa m 1/2 which makes it suitable bioapplications, dental implants.
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