Properties of experimental copper-aluminium-nickel alloys for dental post-and-core applications
| Autor: | Choltacha Harniratisai, Apiwat Rittapai, Julathep Kajornchaiyakul, Somchai Urapepon |
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| Rok vydání: | 2013 |
| Předmět: |
Post and core
Materials science Copper alloy Dental alloy Alloy chemistry.chemical_element Young's modulus Liquidus Solidus engineering.material Cu-Al-Ni alloy Copper symbols.namesake Nickel chemistry Aluminium Ultimate tensile strength symbols engineering Dentistry (miscellaneous) Original Article Oral Surgery Nuclear chemistry |
| Zdroj: | The Journal of Advanced Prosthodontics |
| ISSN: | 2005-7806 |
| Popis: | PURPOSE. This study aimed to develop a copper-aluminium-nickel alloy which has properties comparable to that of dental alloys used for dental post and core applications with the reasonable cost. MATERIALS AND METHODS. Sixteen groups of experimental copper alloys with variants of 3, 6, 9, 12 wt% Al and 0, 2, 4, 6 wt% Ni were prepared and casted. Their properties were tested and evaluated. The data of thermal, physical, and mechanical properties were analyzed using the two-way ANOVA and Tukey’s test (α=0.05). The alloy toxicity was evaluated according to the ISO standard. RESULTS. The solidus and liquidus points of experimental alloys ranged from 1023°C to 1113°C and increased as the nickel content increased. The highest ultimate tensile strength (595.9 ± 14.2 MPa) was shown in the Cu-12Al-4Ni alloy. The tensile strength was increased as the both elements increased. Alloys with 3-6 wt% Al exhibited a small amount of 0.2% proof strength. Accordingly, the Cu-9Al-2Ni and Cu-9Al-4Ni alloys not only demonstrated an appropriate modulus of elasticity (113.9 ± 8.0 and 122.8 ± 11.3 GPa, respectively), but also had a value of 0.2% proof strength (190.8 ± 4.8 and 198.2 ± 3.4 MPa, respectively), which complied with the ISO standard requirement (>180 MPa). Alloys with the highest contents of nickel (6 wt% Ni) revealed a widespread decolourisation zone (5.0-5.9 mm), which correspondingly produced the largest cell response, equating positive control. CONCLUSION. The copper alloys fused with 9 wt% Al and 2-4 wt% Ni can be considered for a potential use as dental post and core applications. [J Adv Prosthodont 2014;6:215-23] |
| Databáze: | OpenAIRE |
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