Oxide Adherence and Porcelain Bonding to Titanium and Ti-6A1-4V Alloy

Abstract

The bonding of an experimental low-fusing porcelain to titanium and Ti-6AI-4V was evaluated by an x-ray spectrometric technique that measures the area that remains covered with porcelain following a controlled deformation of the metallic substrate. Oxide adherence strength values for titanium and Ti- 6AI-4V oxidized at 750° and 1000°C were measured in tension with use of high-strength adhesives. The effect of further oxidation that would occur during porcelain firing was evaluated via simulated porcelain firings without actual porcelain application. Interface cross-sections of the titanium-porcelain and Ti-6AI-4V-porcelain bonds were examined in a scanning electron microscope (SEM). The porcelain was found to delaminate completely from the metal substrate, leaving less than 1% of the surface covered with porcelain. The oxide adherence of the specimens oxidized at 750°C was good, but those oxidized at 1000°C exhibited significantly lower oxide adherence (p = 0.001). The simulated porcelain-firing oxidation treatments also produced a significant decrease in oxide adherence (p = 0.004). The 750°C oxidation treatments produced oxide films too thin to be visualized in the SEM, whereas the 1000°C oxidation treatments produced oxide films approximately 1 µm thick. The lower oxide adherence of the 1-~,m-thick oxide films is consistent with reports in the titanium literature of oxide delamination when the oxide film reaches 1 µm in thickness.

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References

Bertrand, G. ; Jarraya, K. ; and Chaix, J.M. (1983): Morphology of Oxide Scales Formed on Titanium , Oxid Metals 21:1-19.

David, D. ; Beranger, G. ; and Garcia, E.A. (1983): A Study of the Diffusion of Oxygen in a-Titanium Oxidized in the Temperature Range 460-700°C, J Electrochem Soc 130:1423-1426.

Evans, U.R. (1960): The Corrosion and Oxidation of Metals, London : Edward Arnold Ltd., pp. 54-58, 787-790.

Gibbs, G.B. and Hales, R. (1977): Influence of Metal Lattice Vacancies on the Oxidation of High Temperature Materials. In: Vacancies '76, R.E. Smallman and J.E. Harris , Eds., London: The Metals Society, pp. 201-207.

Golightly, F.A. ; Stott, F.H. ; and Wood, G.C. (1979): The Relationship Between Oxide Grain Morphology and Growth Mechanisms for Fe-Cr-Al and Fe-Cr-Al-Y Alloys, J Electrochem Soc 126 :1035-1042.

Herring, C. (1950): Diffusional Viscosity of a Polycrystalliiie Solid , J Appl Phys 21:437-445.

Jenkins, A.E. (1954): The Oxidation of Titanium at High Temperatures in an Atmosphere of Pure Oxygen, J Inst Metall 82:213-221.

Leone, E.F. and Fairhurst, C.W. (1967): Bond Strength and Mechanical Properties of Dental Porcelain Enamels, J Prosthet Dent 18 :155-159.

Lopes Gomes, J.E. and Huntz, A.M. (1980): Comparison of the Kinetics and Morphologic Properties of Titanium, Ti-1.5Ni and Ti-2.5Cu During Oxidation in Pure Oxygen Between 600 and 820°C, Oxid Metals 14:249-261.

10.

Mackert, J.R., Jr. ; Parry, E.E. ; and Fairhurst, C.W. (1985): Oxide Adherence to a Ni-Cr-Mo Alloy, Dent Mater 1:111-114.

11.

Mackert, J.R., Jr. ; Parry, E.E. ; Hashinger, D.T. ; and Fairhurst, C.W. (1984): Measurement of Oxide Adherence to PFM Alloys, J Dent Res 63:1335-1340.

12.

Mackert, J.R., Jr. ; Ringle, R.D. ; Parry, E.E. ; Evans, A.L. ; and Fairhurst, C.W. (1988). The Relationship Between Oxide Adherence and Porcelain-Metal Bonding , J Dent Res 67:474-478.

13.

Menis, D.L. ; Moser, J.B. ; and Greener, E.H. (1986): Experimental Porcelain Compositions for Application to Cast Titanium, J Dent Res 65:343, Abst. No. 1565.

14.

Meyer, J.M. ; O'Brien, W.J. ; and Yu, C.U. (1976): Sintering of Dental Porcelain Enamels, J Dent Res 55:696-699.

15.

O'Brien, W.J. (1977): Cohesive Plateau Theory of Porcelain-Alloy Bonding , IADR Prog & Abst 56: No. 501.

16.

Ringle, R.D. ; Mackert, J.R., Jr. ; and Fairhurst, C.W. (1983): An X-ray Spectrometric Technique for Measuring Porcelain-Metal Adherence, J Dent Res 62:933-936.

17.

Rüdinger, K. and Weigand, H.H. (1973): On the Scaling Behavior of Commercial Titanium Alloys. In: Titanium Science & Technology, R.I. Jaffee and H.M. Burke , Eds., New York: Plenum Pub., pp. 2555-2571.

18.

Shell, J.S. and Nielsen, J.P. (1962): Study of the Bond Between Gold Alloys and Porcelain , J Dent Res 41:1424-1437.

19.

Whittle, D.P. and Stringer, J. (1980): Improvements in High Temperature Oxidation Resistance by Additions of Reactive Elements or Oxide Dispersions, Philos Trans R Soc Land A 295:309-329.