Transactions of Nonferrous Metals Society of China The Chinese Journal of Nonferrous Metals

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Transactions of Nonferrous Metals Society of China

Vol. 24    No. 1    July 2014

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Mechanical properties of CNT reinforced hybrid functionallygraded materials for bioimplants
M. Asif HUSSAIN1,Adnan MAQBOOL1, 2, F. Ahmad KHALID1, Nabi BAKHSH1, Ali HUSSAIN2, Jamil Ur RAHMAN2, Jong Kyu PARK2, Tae Gone PARK2, Lee Jae HYUN2,Myong Ho KIM2

1. Faculty of Materials Science and Engineering, GIK Institute of Engineering Sciences and Technology,
Topi, KPK, Pakistan;
2. Engineering Research Center for Integrated Mechatronics Materials and Components,
Changwon National University, Gyeongnam 641-773, Korea

Abstract:The hybrid functionally graded materials (FGM) of hydroxyapatite (HA), stainless steel 316L (SS316L) and carbon nanotubes (CNT) were synthesized for biomedical implants. Three different types of FGM were produced by the combination of SS316L and CNT to reinforce HA in discrete layersof FGM. In the first type of FGM, concentration of SS316L was varied from 10% to 40% (mass fraction) with an increment of 10% to reinforce microHA. In the second type of FGM, 0.5% (mass fraction) functionalized CNT was added by maintaining the rest of composition asthat of the first type of FGM. In the third type of FGM, mixture of micro and nano HA (mass ratio1:1) was used, keeping rest of composition similar to the secondtype of FGM. All types of FGM were subjected to uniaxial compaction and sintered by pressureless sintering technique at similar compaction and sintering parameters. The results show that the densification is enhanced with the addition of CNT and nanocrystalline HA in the FGM. Hardness and fracture toughness increase in both FGM reinforced with CNT, but the increase of the hardness and fracture toughness are more pronounced in FGM with micro and nanocrystalline HA.


Key words: functionally graded materials; hydroxyapatite; nanocomposites; biomaterial; implant

ISSN 1004-0609
CN 43-1238/TG

ISSN 1003-6326
CN 43-1239/TG

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