【摘要】 目的 :了解VitaIn -Ceramaluminablock的可切削性及有关性能。方法 :采用重量体积法测试VitaIn-Ceramaluminablock密度和气孔率 ,利用热综合分析仪、电子万能试验机、硬度仪测试物理、力学性能 ,计算其可加工指数 ,并用电子显微镜分析微观结构。结果 :VitaIn -Ceramaluminablock的密度 2 .79g/cm3 ,真气孔率 3 0 .0 3 %、显气孔率 2 8.69%、闭气孔率 1.3 5 %、热膨胀系数 8.16× 10 -6℃ -1、弯曲强度 112 .47MPa ,断裂韧性 1.66MPa .m1/ 2 ,显微硬度 2 .0 9GPa。结论 :VitaIn -Ceramaluminablock的可切削性能好 ,具有一定的强度和韧性更多还原

【Abstract】 Objective:This study investigated the mechanablel and other properties of Vita In-Ceram block. Method: The density , degree of porosity and mechanical properties of this material were tested, and the relationship between microstructure and properties mentioned above were revealed with electron microscope. Result: Vita In-Ceram alumina block had following properties: density 2.79 g/cm 3,true porosity 30.03%、apparent porosity 28.69%、closed porosity 1.34%、bending strength 112.47 Mpa,fracture toughness 1.66MPam1/2 ,microhardness 2.09Gpa. Conclusion: Vita In-Ceram alumina block had both favorable machinable capacity and high degree of strength simultaneously.更多还原