测定金刚石膜断裂强度及断裂韧性的力控制法研究

An Investigation on Force Controlling Method for Measuring Fracture Strength and Toughness of Diamond Film

人造金刚石膜是一种新材料 .断裂强度及断裂韧性是其主要力学性能指标 ,目前国内、外尚无相应的强度测试方法标准 ,一般采用类比陶瓷测定断裂强度与断裂韧性的方法进行 ,即采用位移控制法进行检测 .基于金刚石膜是一种硬度比陶瓷更高的材料 ,本文首次提出对金刚石膜用一种力控制法进行检测 .在试验时采用专用的弹性压力头加载 ,加载速度可调 ,加载平稳、可靠 。

The man made diamond film is a kind of high brittle material. For measuring its fracture strength and toughness, a new loading method with force controlling is presented. In the method an elastic pressing head is used to control the rate of loading, and the whole device works smoothly and steadily.