HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS		QUICK SEARCH:   [advanced] Author: Keyword(s): Year:  Vol:  Page:

This Article Abstract Full Text Full Text (PDF) Services Similar articles in this journal Similar articles in ISI Web of Science Similar articles in PubMed Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via HighWire Citing Articles via ISI Web of Science (6) Citing Articles via Google Scholar Google Scholar Articles by Hegedus, C. Articles by Beke, D.L. Search for Related Content PubMed PubMed Citation Articles by Hegedus, C. Articles by Beke, D.L.

Comparative Microstructural Study of the Diffusion Zone between NiCr Alloy and Different Dental Ceramics

C. Hegeds^1,*, L. Daróczi², V. Kökényesi¹, and D.L. Beke²

¹ University of Debrecen, Medical and Health Science Center, Institute of Dental Science, Department of Prosthetic Dentistry, Debrecen, Hungary Nagyerdei krt. 98, H-4012, Hungary; and
² University of Debrecen, Department of Solid State Physics, Hungary;

View larger version (95K): [in a new window]   Figure 1. The Ni-Cr Carat system after the firing process recommended by the manufacturer. Two different phases, A and B, developed between the metal (upper side of the Fig.) and ceramic. The corresponding EDS spectra and electron diffraction pattern can be seen on the inserts.

View larger version (129K): [in a new window]   Figure 2. The Ni-Cr Vision system after the firing process recommended by the manufacturer. Three different phases (A, B, and C) were observed in the diffusion zone. Phase C, with high Ni and Cr content, has an f.c.c. crystal structure with a lattice parameter of 0.82 nm. The corresponding insert shows the diffraction pattern from the [310] direction.

View larger version (85K): [in a new window]   Figure 3. The Ni-Cr Carat system after the firing process with increased time. Phases A and B are the same as in Fig. 1, while phase C appeared just after the longer heat treatment.

View larger version (12K): [in a new window]   Figure 4. Schematic picture of the phase-growing process. At the first stage of the firing process, the crystalline Cr2O3 and amorphous SiOx phases appear (a). At longer firing times, a complex oxide phase starts to grow (b).