Research on resistance to corrosive wear of dental CoCrMo alloy containing post-production scrap

Beer–Lech, Karolina; Surowska, B.

doi:10.17531/ein.2015.1.12

Cited by 8 publications

(6 citation statements)

References 16 publications

(26 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In recent years, investigations of biocorrosion, galvanic corrosion, wear corrosion, fatigue corrosion and stress corrosion of titanium have been carried out with Co-Cr, Ni-Cr and stainless steels in different physiological solutions to determine their resistance to corrosion and use them in various biomedical applications, including orthodontic wires with memory, crowns and dental bridges, endo-osseous dental implants and plates for oral and maxillary surgery [5][6][7][8][9][10][11][12][13][14].…”

Section: Introductionmentioning

confidence: 99%

Artigo Retratado

2021

View full text Add to dashboard Cite

In this work, the open-circuit corrosion potentials of the alloys studied in aerated artificial saliva were determined; in the same solution, the potentiodynamic polarization curves of said alloys have been drawn. The corrosion potentials and current intensities of the galvanic coupling of the Ti-6Al-4V alloy with the Co-Cr and Ni-Cr alloys were determined using the Evans method, finding that the galvanic couples more resistant to corrosion in the electrolytic medium considered are those formed between the Ti alloy and the Co-Cr alloys; the least resistant are those formed between Ti alloy and Ni-Cr alloys. The corroded surfaces of the seven alloys considered in this work were also studied, and by EDAX the corrosion products due to the ions detached in the electrolytic medium were analyzed.

show abstract

Section: Introductionmentioning

confidence: 99%

Artigo Retratado

2021

View full text Add to dashboard Cite

show abstract

“…This often causes damage to the fixing elements of the prosthesis or damage to the entire prosthesis. There are two types of dentures damage: i) extraoralarises as a result of mechanical damage, i.e., violence, diseases; ii) intraoralincluding operational damage: wear of the prosthesis by friction and corrosion, changes in the conditions of the prosthetic base causing inaccuracy in the adhesion of the plate and uneven loading of the plate, lack of strain relief, short-circuit and non-short-circuit para-functions [1][2][3].…”

Section: Introductionmentioning

confidence: 99%

Structural and tribological properties of the re-casted dental NiCrMo alloy

Skic

Beer–Lech

Szala

et al. 2021

J. Phys.: Conf. Ser.

View full text Add to dashboard Cite

The crisis related to the COVID 19 pandemic caused an increase in nickel prices on the global markets. From this perspective, it seems promising to search for the possibilities of effective recycling of nickel-based alloys as biomaterials. The topic of the recasting of Ni-Cr dental alloys is currently being broadly described in the literature. Nonetheless, there are still no conclusive results on the impact of recasting on the quality of the cast dentures. Considering the aforementioned, for research, the effect of recasting on the wear resistance and microstructure of NiCrMo dental alloy was investigated. The Heraenium NA alloy was used for testing. Abrasion resistance was tested by the ball on disc method. Microstructure and wear trace were observed using an optical microscope and a scanning electron microscope. The tests showed a higher wear resistance of the re-casted material. The average coefficient of friction for the initially cast alloys was 0.664, while for the remelted samples the mean value was 0.441. The tested samples are characterised by an abrasive-adhesive wear mechanism. Piling up of the wear tracks edges was observed – the highest for H100. For the H100 samples, a slightly lower average hardness value (HV10) was observed – 226 compared to 233 (HV10) for the samples made from the re-casted alloy (H0). The presence of a dendritic structure of alloys was demonstrated. Blocky eutectic precipitations are visible against the matrix. The observed growth of interdendritic precipitations constitute a natural barrier for the counterpart material and increases its tribological properties. Obtained results suggest that alloy recasting does not constitute a limitation to its use.

show abstract

“…[2][3][4][5][6] Cobalt alloys as biomaterials, including dental ones, are characterized by very good resistance to pitting and crevice corrosion as well as good mechanical properties. 7 Requirements for metal materials used in prosthetic restorations are specified in ISO 22674: 2016. 8 The main components of cobalt alloys used in medicine are chromium, molybdenum, nickel and tungsten.…”

Section: Introductionmentioning

confidence: 99%

Analysis of the Carbon Content Effect on the Microstructure and Thermal Behavior of Cobalt-Matrix Dental Alloy

et al. 2019

Self Cite

View full text Add to dashboard Cite

The aim of the study was to consider the crystallization interval of dental CoCrMo alloys with different carbon contents as well quantitative and qualitative analysis of changes in their microstructure. The two different batches of Wironit extra-hard alloy (0.413 and 0.806% C by mass.) were tested. The chemical composition has been carried out as well as microstructure characterization (optical, scanning electron microscopy and X-ray diffraction). A quantitative and qualitative image analysis was performed. The process of differential thermal analysis was carried out in the Balzers VSG-02 vacuum induction furnace. The presence of the Co-b solution matrix and M 23 C 6 carbides was demonstrated as well as Co-a solution. Along with the change in the content of carbon in the castings, a qualitative change in the microstructure was noted. Low carbon castings are dominated by blocky eutectic-type precipitates, whereas in high carbon castings, blocky dense precipitates dominate. The results showed that the carbon content influences the crystallization parameters of the alloy (in particular increasing the T liq and decreasing the T sol with lower carbon content). It was shown that the melting point of the alloy was higher than indicated by the manufacturer (1533-1578 K). For this study, the range of 1635-1660 K was obtained. This occurrence is very disadvantageous. Using the recommended pouring temperature of 1693 K for casting the material, which usually has a carbon content of about 0.4%, a low degree of superheat is obtained, which significantly limits or even excludes the castability of the alloy.

show abstract

Research on resistance to corrosive wear of dental CoCrMo alloy containing post-production scrap

Abstract: ReseaRch on Resistance to coRRosive weaR of dental cocrMo alloy containing post-pRoduction scRap Badanie odpoRności na zużycie koRozyjne stoMatologicznego stopu cocrMo zawieRającego złoM popRodukcyjny*

Cited by 8 publications

References 16 publications

Artigo Retratado

Artigo Retratado

Structural and tribological properties of the re-casted dental NiCrMo alloy

Analysis of the Carbon Content Effect on the Microstructure and Thermal Behavior of Cobalt-Matrix Dental Alloy

Contact Info

Product

Resources

About