TY - GEN
T1 - Assistive electro discharge machining of ain ceramics
AU - Sarsen, Aydarkhan
AU - Bilal, Azat
AU - Ravi Sankar, M.
AU - Talamona, Didier
AU - Perveen, A.
N1 - Funding Information:
This research study was supported by Nazarbayev University under the project Multi-scale Investigation of the Machining Behavior of Non-conductive Ceramics Using Electro-Discharge Machining (grant no: 090118FD5324).
Publisher Copyright:
© 2019 Trans Tech Publications, Switzerland.
PY - 2019
Y1 - 2019
N2 - Electro discharge machining process experiences limitation due to the non-conductive nature of the workpiece material. However, researchers proposed assistive EDM technique to machine nonconductive materials in the past. These assistive techniques require a minimal thickness of 100 µm conductive coating on the workpiece surface which usually takes longer time to coat the surface using PVD (physical vapor deposition) method. In this paper, a new modified assistive EDM method has been proposed to machine nonconductive Aluminum Nitride ceramics successfully. A three layers coating was used that included silver coating, carbon tape and silver nano-powder on a non-conductive aluminium nitride. This coating aids in conducting EDM operation due to the availability of conductive particles. Apart from the decomposition of dielectric that facilitates carbon particles on top of conductive carbon layer, coating itself also contributes in conductive silver particles. Therefore, carbon as well as silver debris that remains on the ceramics surface aids in continuous spark generation which in turn creates alternative thermal load and thus removes materials.
AB - Electro discharge machining process experiences limitation due to the non-conductive nature of the workpiece material. However, researchers proposed assistive EDM technique to machine nonconductive materials in the past. These assistive techniques require a minimal thickness of 100 µm conductive coating on the workpiece surface which usually takes longer time to coat the surface using PVD (physical vapor deposition) method. In this paper, a new modified assistive EDM method has been proposed to machine nonconductive Aluminum Nitride ceramics successfully. A three layers coating was used that included silver coating, carbon tape and silver nano-powder on a non-conductive aluminium nitride. This coating aids in conducting EDM operation due to the availability of conductive particles. Apart from the decomposition of dielectric that facilitates carbon particles on top of conductive carbon layer, coating itself also contributes in conductive silver particles. Therefore, carbon as well as silver debris that remains on the ceramics surface aids in continuous spark generation which in turn creates alternative thermal load and thus removes materials.
KW - Assisted EDM
KW - Ceramics
KW - Nano powder
KW - Silver coating
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U2 - 10.4028/www.scientific.net/MSF.947.109
DO - 10.4028/www.scientific.net/MSF.947.109
M3 - Conference contribution
AN - SCOPUS:85066241234
SN - 9783035714302
T3 - Materials Science Forum
SP - 109
EP - 113
BT - Nano Engineering and Materials Technologies III
A2 - Umemura, Kazuo
PB - Trans Tech Publications
T2 - 7th International Conference on Nanostructures, Nanomaterials and Nanoengineering, ICNNN 2018 and International Conference on Materials Technology and Applications, ICMTA 2018
Y2 - 26 October 2018 through 29 October 2018
ER -