Wear of the Shape-Generating Counterpart

Since the material removal during ultrasonic lapping is based, as described, on the embrittlement of increasingly stressed material areas, materials with a distinctive elastic-plastic behavior are used as coimterpart materials. The wear, however, cannot be avoided despite a specific material selection therefore, the following effects on the process result emerge (Noelke, 1980 Bonsch, 1992)  

The use of PCD counterparts could significantly reduce the wear and distinctly improve the reproducibility of the accuracies of shape and dimension (Noelke, 1980 Konig and Bonsch, 1991). Owing to the high material costs, however, PCD counterparts have not been accepted for ultrasonic lapping. 

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