Engineering Ceramics

 

The process of Engineering Ceramics:

Engineering ceramics are widely used in modern industry because of their excellent physical and mechanical properties. However, they are difficult to process due to their high hardness and brittleness.

Electro-discharge machining (EDM) is a suitable process for machining engineering ceramics, provided they are electrically conductive. However, the current popular engineering ceramics have high resistivity. The relationship between EDM parameters and engineering ceramic resistivity has not been studied.

The effects of resistivity and EDM parameters such as tool polarity, pulse interval, and electrode material. It examines the EDM properties of ZnO/Al2O3 ceramics, including material removal rate (MRR), electrode wear rate (EWR), and surface roughness (SR).

 

 

The results show that resistivity and EDM parameters have a great influence on EDM performance. Copper electrodes, negative polarity and short pulse intervals can efficiently process ZnO/Al2O3 ceramics with resistivities up to 3410 Ω·cm. Under most machining conditions, MRR increases and SR decreases as resistivity decreases. Additionally, tool polarity and pulse interval affect EWR respectively. Resistivity and electrode material have a combined effect on EWR.

Furthermore, when the electrode material changes, the EDM performance of ZnO/Al2O3 ceramics with resistivity higher than 687 Ω·cm is significantly different from those with resistivity below 687 Ω·cm. Welcome inquiry.