| Journal: | Materials research |
| Database: | PERIÓDICA |
| System number: | 000312966 |
| ISSN: | 1516-1439 |
| Authors: | Silva, Flavio Teixeira da1 Zacche, Marcio Alessandro Negrelly Amorim, Helio Salim de2 |
| Institutions: | 1Universidade Federal do Rio de Janeiro, Centro de Tecnologia, Rio de Janeiro. Brasil 2Universidade Federal do Rio de Janeiro, Rio de Janeiro. Brasil |
| Year: | 2007 |
| Season: | Ene-Mar |
| Volumen: | 10 |
| Number: | 1 |
| Pages: | 63-68 |
| Country: | Brasil |
| Language: | Inglés |
| Document type: | Nota breve o noticia |
| Approach: | Experimental |
| English abstract | The objective of this study was to investigate how mechanical surface treatments performed for removal of excess of molten glass, influence the fracture toughness of a dental zirconia toughened alumina (In-Ceram® Zirconia). Infiltrated ZTA disks were submitted to three different surface treatments (grinding, sandblasting and grinding + sandblasting + annealing). Fracture toughness was accessed through indentation strength test (IS). X ray diffraction was used to investigate the metastability of tetragonal zirconia particles under all treatments proposed. Kruskall-Wallis non-parametrical test and Weibull statistics were used to analyze the results. Grinding (group 1) introduced defects which decreased the fracture toughness and reliability, presenting the lowest K IC. On the other hand, grinding followed by sandblasting and annealing (group 3) presented the highest K IC. Sandblasting (group 2) presented the highest reliability but lower K IC compared to group 3 |
| Disciplines: | Ingeniería, Medicina |
| Keyword: | Ingeniería de materiales, Odontología, Cerámica, Alúmina, Circonio, Prótesis dental, Propiedades mecánicas |
| Keyword: | Engineering, Medicine, Materials engineering, Dentistry, Ceramics, Alumina, Zirconium, Dental prosthesis, Mechanical properties |
| Full text: | Texto completo (Ver HTML) |
