Probability of precision micro-machining of insulating Si3N4 ceramics by EDM

Muttamara, Apiwat; Fukuzawa, Yasushi; Mohri, Naotake; Tani, Takayuki

doi:10.1016/s0924-0136(03)00745-3

Cited by 76 publications

(30 citation statements)

References 3 publications

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“…Thus, MRR in µEDM 9 is influenced by all the three machining parameters and not individually. The optimum machining parameters from S/N ratio for high MRR are 150V, 0.4µF, 80%.…”

Section: Materials Removal Rate (Mrr)mentioning

confidence: 95%

“…Thus, there is no physical contact between the electrode and workpiece and hence material hardness is not an issue. In the past few years, researchers have demonstrated successful machining of ceramics such as WC [2][3][4], SiC [5][6][7], SiN [8], Si 3 N 4 [9], ZrO 2 [10] using EDM process. Thus, it follows that EDM is suitable for machining ceramics.…”

Section: Introductionmentioning

confidence: 99%

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Experimental investigation into the micro-EDM characteristics of conductive SiC

Saxena

Srivastava

Agarwal

2016

Ceramics International

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“…Thus, MRR in µEDM 9 is influenced by all the three machining parameters and not individually. The optimum machining parameters from S/N ratio for high MRR are 150V, 0.4µF, 80%.…”

Section: Materials Removal Rate (Mrr)mentioning

confidence: 95%

Section: Introductionmentioning

confidence: 99%

Experimental investigation into the micro-EDM characteristics of conductive SiC

Saxena

Srivastava

Agarwal

2016

Ceramics International

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“…The application of electrical discharge machining with a numerically controlled wire cutter (WEDM) allows obtaining elements with complex geometry (2,5D) and with a precisely shaped surface texture (ST) of finished product. Recently, WEDM is used to machine a wide variety of miniature and micro-parts from metals [39][40], sintered materials, alloys [41], cemented carbides and ceramics [42][43]. Therefore, the treatment of this type should enable the development of both the geometry and the surface texture of FeAl intermetallic sinters with and without the addition of nano-Al 2 O 3 ceramics.…”

Section: Introductionmentioning

confidence: 99%

Wire Electrical Discharge Machining Of Feal Intermetallic Sinters Without And With Addition Of Nano-Al2O3 Oxide Ceramic

Ziętala

Durejko

Łazińska

2015

Archives of Metallurgy and Materials

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The influence of the parameters of wire electrical discharge machining (WEDM) on the surface layer of FeAl based sinters with and without Al 2 O 3 nanoceramic addition has been studied in this paper. The properties of the sinters surface layer were controlled by WEDM parameters, including time of interval (t p ) and amplitude of current (I A ). The WEDM roughing and finishing treatments were carried out for selected technological parameters of process. The surface texture (ST) of the sinters after WEDM was analyzed by profilometer method. Theoretical parameters describing abrasive wear resistance of investigated sinters were estimated on the basis on the load capacity curve.On the basis on obtained results it can be stated that there is possibility of shaping geometry of nano-Al 2 O 3 doped and undoped FeAl sinters by WEDM. Reduction of the time of interval (t p ) and increase of current amplitude (I A ) during WEDM deteriorate surface properties. Addition of nano-Al 2 O 3 improve the quality of the obtained surface. Applied parameters of WEDM improve theoretical abrasive wear resistance and lubricant maintenance of the nanoceramic doped material in comparison with undoped sinter.Keywords: surface texture (ST), abrasive wear resistance, wire electrical discharge machining (WEDM), FeAl intermetallic, nano-Al 2 O 3 addition W niniejszej pracy analizowano wpływ parametrów cięcia elektrozyjnego (ang. WEDM -wire electrical discharge machining) na warstwę wierzchnią spieków na osnowie fazy międzymetalicznej FeAl bez i z dodatkiem nanoceremiki Al 2 O 3 . Poprzez zmianę parametrów obróbki elektroerozyjnej, tj. czas przerwy (t p ) i natężenie prądu (I A ), sterowano właściwościami warstwy wierzchniej obrabianych spieków. Dla wybranych parametrów technologicznych procesu przeprowadzono obróbkę zgrubną i wykańczającą. Strukturę geometryczną powierzchni (SGP) spieków po obróbce elektroerozyjnej analizowano za pomocą metody profilometrycznej. Parametry charakteryzujące teoretyczną odporność na zużycie ścierne zostały oszacowane na podstawie krzywych nośności Abbotta-Firestone'a.Na podstawie uzyskanych wyników stwierdzono, że istnieje możliwość kształtowania geometrii spieków FeAl bez i z dodatkiem nanoceramiki Al 2 O 3 za pomocą obróbki elektroerozyjnej WEDM. Wraz ze skróceniem czasu przerwy i wzrostem natężenia prądu podczas obróbki wzrasta chropowatość obrabianych powierzchni, natomiast dodatek nanoceramiki poprawia jakość otrzymanych powierzchni. Zastosowane parametry obróbki WEDM poprawiły teoretyczną odporność na zużycie ścierne i zdolność do przechowywania środka smarnego powierzchni spieków domieszkowanych nanoceramiką, w porównaniu do materiału niedomieszkowanego.

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“…This process can be applied to machine insulating materials, but it shows low efficiency, a lot of electric energy is wasted during machining, and the equipment can be eroded easily by electrolyte [14][15][16]. Mohri et al have developed the techniques of the wire electrical discharge machining (WEDM) and EDM insulating ceramics using kerosene as machining fluid [17,18]. In this method, a metal plate or metal mesh is arranged on the surface of the insulating ceramics as an assisting electrode.…”

Section: Introductionmentioning

confidence: 99%

An experimental research on single discharge machining of insulating ceramics efficiently with high energy capacitor

Zhang

et al. 2011

Sci. China Technol. Sci.

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Insulating ceramics are applied to modern manufacturing industries for their improved material properties. But they are the difficult-to-machine materials because of their high rigidity, high brittleness and non-electrical conductivity. A new method which employs a high energy capacitor for electric discharge machining of insulating ceramics efficiently is presented in this paper, and the single discharge experiments have been carried out. The process uses the high voltage, large capacitor and high discharge energy, it is able to effectively machine insulating ceramics, and the single discharge crater volume of insulating ceramics can reach 17.63 mm 3 . The effects of polarity, peak voltage, capacitance, current-limiting resistance, tool electrode feed, tool electrode section area and assisting electrode thickness on the process performance such as the single discharge crater volume, the tool wear ratio and the assisting electrode wear ratio have been investigated. The microstructure of the discharge crater is examined with a scanning electron microscope (SEM). The results show that the discharge craters have sputtering appearance, the insulating ceramic materials are mostly removed by spalling, in the center region of the discharge some materials are removed by melting and vaporization, and the material removal is enhanced with the machining parameters increasing. EDM, insulating ceramics, single pulse, high energy, high efficiency Citation:Ji R J, Liu Y H, Zhang Y Z, et al. An experimental research on single discharge machining of insulating ceramics efficiently with high energy capacitor.

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Probability of precision micro-machining of insulating Si3N4 ceramics by EDM

Cited by 76 publications

References 3 publications

Experimental investigation into the micro-EDM characteristics of conductive SiC

Experimental investigation into the micro-EDM characteristics of conductive SiC

Wire Electrical Discharge Machining Of Feal Intermetallic Sinters Without And With Addition Of Nano-Al2O3 Oxide Ceramic

An experimental research on single discharge machining of insulating ceramics efficiently with high energy capacitor

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