Press R J, Phillips K, Nicholls J, Butson T
Department of Prosthodontics, Box 357452, University of Washington, Seattle, Washington 98195-7452, USA.
Int J Prosthodont. 2001 May-Jun;14(3):239-44.
This research investigated the effect of surface treatment on the fatigue life of metal-ceramic postsoldering.
Twenty cylindric specimens were cast in a metal-ceramic alloy. All specimens received appropriate heat treatment simulating ceramic application, although no porcelain was applied. Each specimen was cut in half to form two half specimens. The 40 half specimens were randomly assigned to one of the four treatment groups, which differed in the type of surface treatment performed on one end of each half specimen (joint surface) prior to soldering: (1) aluminous oxide pink stone; (2) 50-micron aluminum oxide sandblasting; (3) brown rubber point; and (4) gray silicone wheel followed by pink silicone wheel. All surface treatments were performed for 30 seconds. The half specimens were then steam cleaned, aligned, indexed, and oven soldered with #650 postceramic solder. The soldering of two half specimens formed a complete test specimen, and a total of 20 postceramic soldered specimens were prepared. Following soldering, a 241.1 MPa fatigue stress was applied to each solder joint during specimen testing. The test variable was the number of stress cycles required to fail each specimen.
All specimens failed adhesively at the joint interface between the solder and parent metal. There were significant differences in the number of stress cycles to failure between groups 1 and 2, groups 1 and 4, and between groups 2 and 3.
The load cycle to failure for postceramic soldered joints was affected by the metal surface treatment.
本研究调查了表面处理对金属 - 陶瓷焊后的疲劳寿命的影响。
用金属 - 陶瓷合金铸造20个圆柱形试件。所有试件都接受了模拟陶瓷应用的适当热处理，尽管未施加瓷层。每个试件被切成两半以形成两个半试件。这40个半试件被随机分配到四个处理组之一，各处理组在每个半试件一端（结合面）进行焊接前的表面处理类型不同：（1）氧化铝粉石；（2）50微米氧化铝喷砂；（3）棕色橡胶磨头；（4）灰色硅砂轮接着粉色硅砂轮。所有表面处理均进行30秒。然后将半试件进行蒸汽清洁、对齐、定位，并使用#650陶瓷后焊料进行炉内焊接。两个半试件的焊接形成一个完整的测试试件，共制备了20个陶瓷后焊接试件。焊接后，在试件测试期间对每个焊点施加241.1兆帕的疲劳应力。测试变量是每个试件失效所需的应力循环次数。
所有试件均在焊料与母材的结合界面处发生粘结失效。第1组和第2组、第1组和第4组以及第2组和第3组之间在失效应力循环次数上存在显著差异。
陶瓷后焊接接头的失效载荷循环受金属表面处理的影响。
