Rotary ultrasonic machining of ZrO₂-NbC and ZrO₂-WC ceramics
by Alejandro Sandá; Carmen Sanz
International Journal of Machining and Machinability of Materials (IJMMM), Vol. 22, No. 2, 2020

Abstract: ZrO₂-based ceramics are extremely difficult to manufacture, rotary ultrasonic machining (RUM) being an interesting machining process for these materials. In this work, ZrO₂-NbC and ZrO₂-WC ceramic composites have been RUM-processed and the differences in cutting forces, surface quality and dominant machining mechanisms under different machining operations and conditions have been studied. In ZrO₂-NbC, the presence of the ductile fracture material removal mode is more evident than in ZrO₂-WC, where the brittle fracture mode seems to be dominant. This contributes to a slightly better machinability of ZrO₂-NbC compared to ZrO₂-WC, what results in slightly higher material removal rates (MRR) and lower surface roughness.

Online publication date: Mon, 09-Mar-2020

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