Role of “Adherence Oxides” in the Development of Chemical Bonding at Glass‐Metal Interfaces

Borom, Marcus P.; Pask, Joseph A.

doi:10.1111/j.1151-2916.1966.tb13135.x

Cited by 101 publications

(31 citation statements)

References 4 publications

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“…It is a well-known fact that titanium has a higher melting temperature (1,668°C), owing to high melting temperature and vacuum casting circumstance, SiO 2 coating pre-applied to wax pattern would react with Ti to form new Ti-Si compounds, which served as a barrier for titanium oxidation during porcelain firing. According to the XRD analysis of cast Ti surface, Ti 5Si3 and SiO2 phase were observed in group C. These results agree with the findings of previous studies elaborating the reactions of titanium with various glass materials, such as stomatological porcelain 25) , quartz, glass 26,27) , and silicon oxide 28) . These Ti-Si compounds and SiO2 would form chemical bonding with porcelain, because they are characterized with high homogeneity with dental porcelain.…”

Section: Discussionsupporting

confidence: 82%

Improvement in Ti-porcelain bonding by SiO2 modification of titanium surface through cast method

et al. 2013

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This study aimed to improve Ti-porcelain bonding strength through SiO 2 modifications. Wax patterns were coated with SiO 2 mixed with tetraethoxy silane (group C), patterns without coating were used as controls and subdivided into sandblasting group (group S) and polishing group (group P). Casting surfaces were analyzed with XRD, while Ti-ceramic interfaces were characterized using SEM/EDS. Metal-ceramic specimens were tested in three point bending, and characterizations were also analyzed with SEM/EDS of porcelain debonding surfaces. In group C, SiO 2 and Ti 5 Si 3 phases were observed; SEM micrograph showed that Ti-porcelain had a compacted interface, and EDS maps of the interface illustrated the diffusion of Si, Al, and Sn to Ti, and cohesive fracture within the bonding agent. The bond strength of group C was 39.04±5.0 MPa, which was 15% higher than that of group S and 32% higher than that of group P. SiO 2 coating could improve Ti-porcelain bond strength.

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Section: Discussionsupporting

confidence: 82%

Improvement in Ti-porcelain bonding by SiO2 modification of titanium surface through cast method

et al. 2013

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“…A continuous electronic structure is formed from the metal to porcelain through the oxide layer, forming a chemical bond between metal and porcelain [15,16]. Mechanical interlocking increases the bond strength as documented by McLean [17] and Philips [18].…”

Section: Discussionmentioning

confidence: 99%

Evaluation of the Bond Strength of Ceramic to Nickel- Chromium Alloy with various proportions of Recast Alloy - An Invitro Study.

Mahale¹,

Vasunni²,

V³

et al. 2014

IOSRJDMS

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“…Trace levels of reaction-product phases (metallic iron, nickel, or platinum) are known to alter the color of oxides, even on the parts per million level. [7,[31][32][33][34][35][36] The occurrence of chemical reaction, such as reduction of MnO and SiO 2 , at the interface is known to provide an additional driving force for wetting, above the balance of surface tensions. [5,37,38] Reduction of oxides, particularly MnO, in wetting experiments causes change in slag and substrate chemistry and makes wetting dynamic.…”

Section: A Slag-substrate Reactionmentioning

confidence: 99%

Wettability of Solid Metals by Molten MnO-SiO2 Slag

Parry

Ostrovski

2008

Metall Mater Trans B

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An article presents results of a study of wetting of iron, nickel, and platinum substrates by molten MnO-SiO 2 slag of near-eutectic composition by the sessile-drop method in reducing atmosphere (oxygen partial pressure of 10 -20 to 10 -18 atm). Significant MnO reduction and manganese dissolution into substrate was observed in reactions with all three substrates. Silica also was reduced in reaction with Fe and Ni, although the extent of reduction was much smaller in comparison with MnO and was not observed in reaction with Pt. The dissolution of manganese led to modification of the interface with formation of molten phase for nickel and platinum substrates. Terminal contact angles (after 240 minutes) for MnO-SiO 2 slag were as follows: for iron substrates-5 ± 2 deg at 1350°C, 9 ± 2 deg at 1390°C, and 6 ± 2 deg at 1450°C; and for platinum-15 ± 2 deg at 1350°C and 1390°C, and 12 ± 2 deg at 1450°C. The contact angle for the Ni-(MnO-SiO 2 ) system was close to zero-3 ± 2 deg at 1350°C and 1390°C. Modification of the metal-oxide interface as a result of reduction of oxides and adsorption of oxygen made wetting dynamic and affected interfacial properties.

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Role of “Adherence Oxides” in the Development of Chemical Bonding at Glass‐Metal Interfaces

Cited by 101 publications

References 4 publications

Improvement in Ti-porcelain bonding by SiO2 modification of titanium surface through cast method

Improvement in Ti-porcelain bonding by SiO2 modification of titanium surface through cast method

Evaluation of the Bond Strength of Ceramic to Nickel- Chromium Alloy with various proportions of Recast Alloy - An Invitro Study.

Wettability of Solid Metals by Molten MnO-SiO2 Slag

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