烧结次数对齿科氧化锆陶瓷机械性能的影响

发布时间：2019-02-11 18:50

【摘要】：目的:研究不同烧结次数对氧化钇稳定四方相氧化锆(Y-TZP)陶瓷机械性能的影响。方法:制作Y-TZP瓷片,分为3组,分别烧结1、3、5次,每组再分为3个亚组,分别为在压力灭菌锅内进行水热老化处理10、20 h模拟Y-TZP的低温老化组,烧结后未进行老化的作为对照组。如此,实验共分为9组(1-10、1-20、1-C、3-10、3-20、3-C、5-10、5-20、5-C),测量每组试件的3点弯曲强度,压痕法测算其断裂韧性,并利用WEIBULL分布分析弯曲强度测量结果的可靠性。结果:9组试件的弯曲强度及断裂韧性无统计学差异(P0.05),WEIBULL分析同样证实这一结果。结论:烧结次数的增加不会加速Y-TZP的低温老化效应,Y-TZP修复体制作过程中可能需要的多次烧结对Y-TZP材料本身的机械性能无明显影响。
[Abstract]:Aim: to study the effect of different sintering times on mechanical properties of yttrium stabilized tetragonal zirconia (Y-TZP) ceramics. Methods: Y-TZP ceramics were made and divided into 3 groups, each group was sintered for 1 and 3 times. Each group was further divided into three subgroups. Each group was treated with hydrothermal aging in pressure sterilizer for 10 ~ 20 h to simulate Y-TZP in low temperature aging group. The control group without aging after sintering. In this way, the experiment was divided into 9 groups (1-10U 1-20N 1-Cn3-10C). The 3-point bending strength of each sample was measured, and the fracture toughness was measured by indentation method. WEIBULL distribution is used to analyze the reliability of bending strength measurement. Results: there was no significant difference in flexural strength and fracture toughness among 9 groups (P0.05), WEIBULL analysis also confirmed this result. Conclusion: the increase of sintering times does not accelerate the aging effect of Y-TZP at low temperature, and the multiple sintering during the Y-TZP repair process has no obvious effect on the mechanical properties of Y-TZP materials.
【作者单位】：南京医科大学口腔疾病研究江苏省重点实验室南京医科大学附属口腔医院修复科;南京医科大学口腔疾病研究江苏省重点实验室南京医科大学附属口腔医院牙体牙髓科;
【基金】：国家自然科学基金(81400539) 江苏高校优势学科建设工程资助(2014-37) 江苏省自然科学基金(BK20150998,BK20140913) 江苏省高校自然科学基金(15KJB320003)
【分类号】：R783.1

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