Sains Malaysiana 49(3)(2020): 643-651

http://dx.doi.org/10.17576/jsm-2020-4903-19

 

Degradation Characteristics of Porous Fe-Mn-C Alloys Obtained by Sintering-Dissolution Process (SDP) for Metallic Bone Scaffold

(Pencirian Degradasi Aloi Poros Fe-Mn-C Diperoleh daripada Proses Pembubaran Sinter (SDP) untuk Perancah Tulang Metalik)

YUDHA PRATESA1,2, ALMIRA LARASATI2, SRI HARJANTO1,2*, BAMBANG SUHARNO2 & MYRNA ARIATI2 

1Research Center for Biomedical Engineering, Faculty of Engineering, Universitas Indonesia, Kota Depok, Jawa Barat 16424, Indonesia

 

2Department of Metallurgical and Materials Engineering, Faculty of Engineering, Universitas Indonesia, Kota Depok, Jawa Barat 16424, Indonesia

 

Diserahkan: 1 Ogos 2019/Diterima: 5 Disember 2019

 

ABSTRACT

Porous degradable metal is a promising material for hard-tissue scaffold application. It offers better mechanical properties than polymer and easier cell proliferation. However, the corrosion process in the porous metallic implant usually causes toxicity on patient. Therefore, corrosion process is the key for the development of the alloy. The previous study has successfully formed a porous Iron-35%Manganese-1%Carbon (Fe-35Mn-1C) alloy using Potassium carbonate (K2CO3) as foaming agent with powder metallurgy process.  This study focused on the degradation behavior and phase analysis of Fe-Mn-C product by polarization test in ringer solution, Atomic Absorption Spectrometry (AAS), X-Ray Diffraction, and Energy Dispersive Spectroscopy. This process resulted in nonmagnetic Austenitic phase that is beneficial for MRI application. The result showed that Fe-Mn-C alloy with foaming structure is suitable for degradable biomaterials. The density of the product is 3.2 gr/cm3, which is only half of the bulk material. The degradation rate of the metals also increases to 6 mm/year, but the maximum ion released is still under the limit in terms of toxicity against human.

 

Keywords: Degradable biomaterials; Fe-35Mn-1C; powder metallurgy; sinter dissolution process (SDP)

 

Abstrak

Logam degradasi berliang adalah bahan yang berpotensi untuk dibangunkan sebagai perancah tisu keras. Ia menawarkan sifat mekanik yang lebih baik daripada polimer. Struktur poros bermanfaat untuk percambahan sel yang tinggi dalam implan. Walau bagaimanapun, proses kakisan dalam biomas bahan metalik menyebabkan ketoksikan pada pesakit. Oleh itu, proses kakisan adalah kunci kepada perkembangan aloi. Kajian terdahulu telah berjaya membentuk aloi besi-35% Manganese-1% Karbon (Fe-35Mn-1C) menggunakan potasium karbonat (K2CO3) sebagai agen berbuih dengan proses metalurgi serbuk. Kajian ini menumpukan kepada tingkah laku perosak dan analisis fasa produk Fe-Mn-C melalui ujian Polarisasi dalam penyelesaian dering, Spektrometri Penyerapan Atom (AAS), Difraksi X-Ray dan Spektroskopi Penyebaran Tenaga. Hasilnya menunjukkan bahawa aloi Fe-Mn-C dengan struktur buih sesuai untuk degradasi biobahan. Ketumpatan produk adalah 3.2 gr/cm3, yang hanya separuh daripada bahan pukal, kadar degradasi logam juga meningkat kepada 6 mm/tahun tetapi keluaran ion maksimum di bawah paras ketoksikan pada manusia. Ia membentuk fasa Austenitic yang merupakan fasa nonmagnetik dan selamat untuk aplikasi MRI.

 

Kata kunci: Degradasi biobahan; Fe-35Mn-1C; metalurgi serbuk; proses pembubaran sinter (SDP)

 

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*Pengarang untuk surat-menyurat; email: sri.harjanto@ui.ac.id

 

 

 

 
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