激光与光电子学进展, 2020, 57 (5): 051402, 网络出版: 2020-03-05
VITA MARK II牙科玻璃陶瓷超快激光铣削工艺 下载: 1261次
Ultra-Fast Laser Milling Technology for VITA MARK II Dental Glass Ceramics
激光器 超快激光 牙科玻璃陶瓷 激光工艺参数 铣削效率 铣削效果 lasers ultra-fast laser dental glass ceramic laser process parameters milling efficiency milling effect
摘要
使用5 W红外飞秒激光器对牙科全瓷修复中常用的玻璃陶瓷材料VITA MARK II进行铣削加工实验,系统研究超快激光加工工艺参数对铣削效率以及铣削效果的影响,并利用5 W红外飞秒激光器实验结果对20 W红外飞秒激光器铣削效率进行模拟预估。实验结果表明,在激光重复频率为100 kHz,扫描速度为200 mm/s,扫描间距为0.01 mm的条件下,5 W红外飞秒激光器对VITA MARK II陶瓷的铣削效率最高,为0.0409 mm 3/s。加工后的VITA MARK II陶瓷粗糙度为3~5 μm,崩边量在50 μm以内,斜坡量在100 μm以内。该牙科玻璃陶瓷的激光切割阈值约为0.72 J/cm 2。推算出20 W红外飞秒激光器对VITA MARK II陶瓷的铣削效率为0.1558 mm 3/s。上述实验论证了5 W激光切割牙科玻璃陶瓷的可行性及有效性,可为20 W红外飞秒激光铣削实验样机的搭建提供参考。
Abstract
VITA MARK II, a commonly used dental glass ceramic material, is typically milled using a 5-W infrared femtosecond laser. The effects of ultra-fast laser process parameters on milling efficiency and milling effects are systematically studied, and the 20-W infrared femtosecond laser prepared for future test prototype is estimated using the experimental results of 5-W infrared femtosecond laser. The experimental results show that the milling efficiency of the 5-W infrared femtosecond laser on VITA MARK II ceramics is 0.0409 mm 3/s when the laser repetition frequency is 100 kHz, the scanning speed is 200 mm/s, and the scanning interval is 0.01 mm. The roughness of VITA MARK II ceramics treated by femtosecond laser is ranged within 3--5 μm, the margin gap is approximately 50 μm, and the slope quantity is within 100 μm. The laser cutting threshold of VITA MARK II dental glass ceramics is 0.72 J/cm 2. It is estimated that the milling efficiency of 20-W infrared femtosecond laser on VITA MARK II ceramics would be 0.1558 mm 3/s. Therefore, this experiment demonstrates the feasibility and effectiveness of laser cutting dental glass ceramics, providing a reference for the construction of the test prototype.
胡培鑫, 姚路, 吕启涛, 吉恩才, 聂子林, 何正娣. VITA MARK II牙科玻璃陶瓷超快激光铣削工艺[J]. 激光与光电子学进展, 2020, 57(5): 051402. Peixin Hu, Lu Yao, Qitao Lü, Encai Ji, Zilin Nie, Zhengdi He. Ultra-Fast Laser Milling Technology for VITA MARK II Dental Glass Ceramics[J]. Laser & Optoelectronics Progress, 2020, 57(5): 051402.