Abstract
The present paper illustrates evaluation of DLC (Diamond-like Carbon) film strength using cyclic plunge load. DLC film strength is generally evaluated using Rockwell hardness measurement, or scratch test. However, these evaluations may not be effective method for DLC film strength which is subjected to cyclic load. Therefore, cyclic plunge load test is proposed for strength evaluation. As a result, it was found that DLC film did not show failure by 27.5N plunge load (number of cycles 10^4) and 65.0N (number of cycles 10^3). And DLC film shows failure by 65.0N plunge load (number of cycles 10^4). In addition, failure points were thought to be inside near by surface of indentation.
