Jurnal Fisika dan Terapannya
ISSN 9 772337 300009
Vol. 2 / No. 2 / Published : 2014-08
Order : 2, and page :20 - 32
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Original Article :
Sintesis dan karakterisasi paduan kobalt dengan variasi cr melalui metode peleburan sebagai material implan
Author :
- Efinda Putri Normasari Susanto*1
- Aminatun*2
- Dyah Hikmawati*3
- Mahasiswa Fakultas Sains dan Teknologi
- Dosen Fakultas Sains dan Teknologi
- Dosen Fakultas Sains dan Teknologi
Abstract :
Used of metal as bone implant prosthesis continues to grow, demand also increases with the number of bone surgery cases in Indonesia. Cobalt alloy with variation of Cr (28.5; 30; 31.5; 33, and 34.5%mass) have been synthesized by smelting method that begins with the compaction, followed by smelting using Tri Arc Melting Furnace at 200A . After smelting process is carried out by homogenizing process at recrystallization temperature (1250º C) for 3 hours to allow the atoms to diffuse and transform into γ phase, then performed arolling process that is accompanied by heating at 1200º C for ± 15 minutes and followed by quenching. This process is repeated until the obtained thickness of ± 1 mm. The results showed that increasing Cr composition can stabilize the formation of γ-phase, it is characterized from increasing the γ-phase percentage of XRD test results. SEM-EDX test result show that the whole process of synthesis had good solubility were either on a flat surface area. Hardness test results showed the high levels of cobalt alloy hardness, while the best of hardness is at 345.24 VHN generated by the variation of 33% Cr. Corrosion test results showed that the sample of 31.5% and 34.5% Cr with corrosion rate of 0.016 and 0.17 mpy has corrosion rate under the specified of Europe standard value is 0.457 mpy. Viewed from the data linearity aspect, the cobalt alloy with 33% Cr has the best of microstructure and mechanical properties among the others. Therefore, cobalt alloy with 33% Cr variation potential to be applied as an implant prosthesis.
Keyword :
Cobalt alloy, prosthesis, XRD, microvickers hardness, SEM-EDX,
References :
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 Volume : 2 / No. : 2 / Pub. : 2014-08 |
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