激光快速成形纯钛与瓷的结合性能研究  

Evaluation of Bond Characteristics between Porcelain and Titanium Fabricated by Rapid Laser Forming

作　　者：张丽君[1] 高勃[1] 王忠义[1] 高阳[1] 邹承蓉[2] 张春宝[1] 

机构地区：[1]第四军医大学口腔医学院修复科,陕西西安710032 [2]兰州军区机关门诊部口腔科,甘肃兰州730000

出　　处：《中国激光》2009年第5期1273-1277,共5页Chinese Journal of Lasers

基　　金：国家863计划(2002AA336050)资助课题

摘　　要：评价了应用激光快速成形(LRF)技术制作纯钛与Noritake Ti-22钛瓷的结合性能。利用商用纯钛粉末、激光快速成形系统和优化的成形工艺参数,制作纯钛试样,测量了其热膨胀系数(CTE),根据ISO9693标准采用三点弯曲方法对钛瓷结合强度进行测试,并对瓷剥脱后的钛表面进行扫描电镜(SEM)和能潜(EDS)分析。结果表明激光快速成形纯钛的热膨胀系数与铸造纯钛无统计学差异,且与Noritakc Ti-22钛瓷匹配。激光快速成形纯钛与Ti22钛瓷的分离类型为混合断裂,包括内聚型和粘附型。钛瓷结合强度大于ISO9693标准所要求的基本值(25MPa)。激光快速成形技术有望成为加工烤瓷熔附金属修复体的新技术。The bond characteristics of titanium porcelain Noritake Ti-22 bonded to pure titanium fabricated by laser rapid forming （LRF） technigue is evaluated. Titanium specimens are fabricated using commercial titanium powder and laser raped forming system, based on the optimized processing parameters. And the coefficient of thermal expansion （CTE） of LRF titanium is evaluated. The bond strength is analyzed with three-point-bonding test according to ISO9693 Standard, and the titanium surface after debonding is analyzed by scanning electron microscope （SEM） and energy disperse spectroscopy （EDS）. There is no significant difference in the CTE between cast titanium and LRF titanium. The CTE of LRF titanium matchs that of Ti-22 porcelain. All titanium-porcelain specimens prepared from LRF titanium exhibit a mixed failure mode of cohesive and adhesive failure. The bond strength of LRF titanium and Ti-22 is above the lower limit value in the ISO9693 Standard （25 MPa）. Laser rapid forming of titanium alloy seems to be an alternative technique to conventional casting of dental alloys for porcelain fused to metal restorations

关 键 词：激光技术 激光快速成形 结合强度 钛 烤瓷 

分 类 号：TN249[电子电信—物理电子学] R783.1[医药卫生—口腔医学]