Properties of experimental copper-aluminium-nickel alloys for dental post-and-core applications
The Journal of Advanced Prosthodontics
; : 215-223, 2014.
Article
in En
| WPRIM
| ID: wpr-53941
Responsible library:
WPRO
ABSTRACT
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 (alpha=0.05). The alloy toxicity was evaluated according to the ISO standard. RESULTS: The solidus and liquidus points of experimental alloys ranged from 1023degrees C to 1113degrees 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.
Key words
Full text:
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Index:
WPRIM
Main subject:
Tensile Strength
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Copper
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Dental Alloys
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Alloys
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Elastic Modulus
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Nickel
Language:
En
Journal:
The Journal of Advanced Prosthodontics
Year:
2014
Type:
Article