A study of the material removal properties in ultrasonic lapping of ZTA ceramics with fixed abrasives by using an online acoustic emission monitoring system Online publication date: Tue, 03-Nov-2009
by Bo Zhao, Feng Jiao, Baoyu Du
International Journal of Abrasive Technology (IJAT), Vol. 2, No. 4, 2009
Abstract: In this paper, online acoustic emission (AE) monitoring system was designed to discuss the material removal properties of zirconia toughened alumina (ZTA) ceramics in ultrasonic lapping. By employing a single-point diamond indenter scratching against ZTA workpiece and time frequency analysis of AE signals, the influence of ultrasonic vibration on ductile material removal was studied and it has been clarified that the range of characteristic frequency of material removal of ZTA ceramic is 200 KHz to 250 KHz for ductile mode, 250 KHz to 450 KHz for ductile-brittle mode and 450 KHz to 500 KHz for brittle mode. By wavelet packet analysis, characteristic criterion of material removal for ultrasonic lapping of ZTA ceramics with fixed abrasives was established. Experimental results proved that this criterion can identify whether the process is in ductile removal or brittle removal mode.
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