Preliminary communication
https://doi.org/10.15644/asc48/4/6
Effects of Wire EDM on the Microstructure of P/M Titanium Samples
Joško Viskić
; School of Dental Medicine, University of Zagreb, Zagreb, Croatia
Zdravko Schauperl
; Faculty of Mechanical Engineering and Naval Architecture, University of Zagreb, Zagreb, Croatia
Amir Ćatić
orcid.org/0000-0002-9332-5423
; School of Dental Medicine, University of Zagreb, Zagreb, Croatia
Martin Balog
orcid.org/0000-0002-6427-1163
; Institute of materials and machine mechanics, Slovak academy of sciences, Slovakia
Peter Krizik
; Institute of materials and machine mechanics, Slovak academy of sciences, Slovakia
Biserka Gržeta
; Institute “Ruđer Bošković”, Zagreb, Croatia
Jasminka Popović
; Institute “Ruđer Bošković”, Zagreb, Croatia
Slađana MILARDOVIĆ ORTOLAN
; School of Dental Medicine, University of Zagreb, Zagreb, Croatia
Ketij Mehulić
orcid.org/0000-0002-1397-9620
; School of Dental Medicine, University of Zagreb, Zagreb, Croatia
Abstract
Purpose: Commercially pure titanium (CP Ti) has been recognized in dentistry for its biocompatibility, good mechanical properties and corrosion resistance. Conventional manufacturing processes can affect surface quality and result in poor bonding of dental ceramics to CP Ti. This is why powder metallurgy (P/M) and wire electro-discharge machining (WEDM) are being introduced in the manufacturing process. The aim of this study was to evaluate the effect of WEDM on the surface composition and microstructure of P/M CP Ti samples produced for bond strength testing according to ISO 9693. Materials and methods: Eight samples of P/M CP Ti, dimensions according to ISO 9693, were made using WEDM and divided in two groups (untreated and grinded). Microanalyses of chemical composition and microstructure of both groups were made using SEM, EDS and XDR. Results: SEM and EDS analysis of untreated samples showed a thin layer on surfaces with fractures in it. Grinded samples showed homogenous structure with no layer and no fractures. XDR analysis showed high level of oxides on the surface of untreated samples, while after grinding only pure α-phase was found. Conclusion: WEDM is a suitable method of sample production for ISO 9693 if accompanied by grinding with silicon carbide papers P320-P4000.
Keywords
Titanium; WEDM; bond strength; powder metallurgy; Surface Properties
Hrčak ID:
131870
URI
Publication date:
30.12.2014.
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