| Autor: |
Xiao-ping, Luo, D C, Watts, N H F, Wilson, N, Silsons, Ya-qin, Cheng |
| Rok vydání: |
2005 |
| Předmět: |
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| Zdroj: |
Zhonghua kou qiang yi xue za zhi = Zhonghua kouqiang yixue zazhi = Chinese journal of stomatology. 40(2) |
| ISSN: |
1002-0098 |
| Popis: |
To investigate the microstructure and mechanical properties of a new IPS-Empress 2 dental glass-ceramic.AFM, SEM and XRD were used to analyze the microstructure and crystal phase of IPS-Empress 2 glass-ceramic. The flexural strength and fracture toughness were tested using 3-point bending method and indentation method respectively.IPS-Empress 2 glass-ceramic mainly consisted of lithium disilicate crystal, lithium phosphate and glass matrix, which formed a continuous interlocking structure. The crystal phases were not changed before and after hot-pressed treatment. AFM showed nucleating agent particles of different sizes distributed on the highly polished ceramic surface. The strength and fracture toughness were 300 MPa and 3.1 MPam(1/2).The high strength and fracture toughness of IPS-Empress 2 glass ceramic are attributed to the fine lithium disilicate crystalline, interlocking microstructure and crack deflection. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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