Abstract
Yttria-stabilized zirconia ceramics were prepared by using different raw materials in order to compare commercially available optical ferrule. Injection-molded cylindrical green compacts were sintered in air at 1350°C, 1400°C and 1450°C for 2 hrs, followed by furnace cooling. Crystallinity, microstructure and mechanical strength of the sintered body were evaluated by using an X-ray diffraction analyses, a field emission-scanning electron microscope, a universal tester, and a micro-hardness tester, respectively. For practical usage, the sample B sintered at 1350°C was favorable because of high tetragonality and good mechanical strength.
Highlights
Yttria-stabilized zirconia ceramics were prepared by using different raw materials in order to compare commercially available optical ferrule
Crystallinity, microstructure and mechanical strength of the sintered body were evaluated by using an X-ray diffraction analyses, a field emission-scanning electron microscope, a universal tester, and a micro-hardness tester, respectively
It is well known that yttria (Y2O3)-stabilized tetragonal zirconia (ZrO2) polycrystal (Y-TZP) possesses excellent mechanical properties and represents toughened zirconia ceramics [1,2]
Summary
It is well known that yttria (Y2O3)-stabilized tetragonal zirconia (ZrO2) polycrystal (Y-TZP) possesses excellent mechanical properties and represents toughened zirconia ceramics [1,2]. The relationship between microstructure and mechanical properties in Y-TZP ceramics has been studied extensively over the past decade [3,4,5]. It is well established that these desirable mechanical properties are strongly influenced by grain size. The small grain size of the nanomaterials has a pronounced effect on many physical properties, such as increased strength and hardness. Throughout our previous work [7], we studied crystallinity and microstructure of Y-TZP ceramics as a function of the variation of raw materials provided by different suppliers with different particle-properties. We confirmed that the raw materials with fine particle size and high tetragonality could be sintered to dense Y-TZP at 1400 ̊C. Crystallinity, microstructure and mechanical strength were examined as a function of various sintering temperature
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