Fatigue behaviour of a glass coating on Ti6AL4V for biomedical applications
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| Format: | Artículo científico |
| Sprache: | en |
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Universidad de Antioquia
2006
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| _version_ | 1876443343654748160 |
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| author | Juan José Pavón |
| author_facet | Juan José Pavón |
| contents | Fatigue behaviour of a glass coating on Ti6AL4V for biomedical applications Juan José Pavón E. Jiménez-Piqué M. Anglada E. Saiz A. P. Tomsia Ingeniería Hertzian indentation Cyclic contact fatigue Sintered glass coating Biomedical applications The fixation of bone replacement implants to the hosting tissue can be improvedif the implants have a bioactive surface that can precipitate hydroxyapatite in vivo.Titanium alloys, despite their desirable mechanical and nontoxic properties, arenot bioactive and, therefore, do not bond directly to the bone. One of the ways tochange a bioinert metallic surface is to coat it with a bioactive material. This workpresents the evaluation of the fatigue behaviour by Hertzian (spherical) indentationof a glass coating on Ti6Al4V. This coating belongs to the SiO2-CaO-MgO-Na2OK2O-P2O5 system and, despite it can be used for corrosion protection, it has beenspecifically designed to be used as the inner layer of a bioactive bilayer coatingwith an outer layer of lower SiO2 content to ensure bioactivity. Hertzian monotonictests allowed to obtain a damage sequence starting with three brittle damage events(ring, cone and radial cracking) followed by coating delamination associated tothe plastic deformation of the substrate. The first brittle damage, ring cracking,was used as criteria for the evaluation of the stress-corrosion and cyclic loadingcracking behaviour in air and in distilled water environments. Results showedsensitivity of the coating to degradation under both static and cyclic loadings whichwas considerably larger in distilled water due to the corrosion susceptibility of thisglass. Delamination damage was also sensitive to Hertzian cyclic loading showingtwo different mechanisms depending of the maximum applied load. 2006 artículo científico 0120-6230 https://www.redalyc.org/articulo.oa?id=43003712 en http://www.redalyc.org/revista.oa?id=430 Revista Facultad de Ingeniería Universidad de Antioquia application/pdf Universidad de Antioquia Revista Facultad de Ingeniería Universidad de Antioquia (Colombia) Num.37 |
| format | Artículo científico |
| id | redalyc_43003712 |
| institution | Redalyc |
| language | en |
| publishDate | 2006 |
| publisher | Universidad de Antioquia |
| spellingShingle | Fatigue behaviour of a glass coating on Ti6AL4V for biomedical applications Juan José Pavón Ingeniería Hertzian indentation Cyclic contact fatigue Sintered glass coating Biomedical applications Fatigue behaviour of a glass coating on Ti6AL4V for biomedical applications Juan José Pavón E. Jiménez-Piqué M. Anglada E. Saiz A. P. Tomsia Ingeniería Hertzian indentation Cyclic contact fatigue Sintered glass coating Biomedical applications The fixation of bone replacement implants to the hosting tissue can be improvedif the implants have a bioactive surface that can precipitate hydroxyapatite in vivo.Titanium alloys, despite their desirable mechanical and nontoxic properties, arenot bioactive and, therefore, do not bond directly to the bone. One of the ways tochange a bioinert metallic surface is to coat it with a bioactive material. This workpresents the evaluation of the fatigue behaviour by Hertzian (spherical) indentationof a glass coating on Ti6Al4V. This coating belongs to the SiO2-CaO-MgO-Na2OK2O-P2O5 system and, despite it can be used for corrosion protection, it has beenspecifically designed to be used as the inner layer of a bioactive bilayer coatingwith an outer layer of lower SiO2 content to ensure bioactivity. Hertzian monotonictests allowed to obtain a damage sequence starting with three brittle damage events(ring, cone and radial cracking) followed by coating delamination associated tothe plastic deformation of the substrate. The first brittle damage, ring cracking,was used as criteria for the evaluation of the stress-corrosion and cyclic loadingcracking behaviour in air and in distilled water environments. Results showedsensitivity of the coating to degradation under both static and cyclic loadings whichwas considerably larger in distilled water due to the corrosion susceptibility of thisglass. Delamination damage was also sensitive to Hertzian cyclic loading showingtwo different mechanisms depending of the maximum applied load. 2006 artículo científico 0120-6230 https://www.redalyc.org/articulo.oa?id=43003712 en http://www.redalyc.org/revista.oa?id=430 Revista Facultad de Ingeniería Universidad de Antioquia application/pdf Universidad de Antioquia Revista Facultad de Ingeniería Universidad de Antioquia (Colombia) Num.37 |
| title | Fatigue behaviour of a glass coating on Ti6AL4V for biomedical applications |
| topic | Ingeniería Hertzian indentation Cyclic contact fatigue Sintered glass coating Biomedical applications |
| url | https://www.redalyc.org/articulo.oa?id=43003712 |