Archives of Metallurgy and Materials

Institute of Metallurgy and Materials Science of Polish Academy of Sciences
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EFFECT OF CONTROLLED POROSITY ON THE MECHANICAL PROPERTIES OF Ti-Zr-Sn-Mo BIOMEDICAL ALLOYS

  • YEON-WOOK KIM (KEIMYUNG UNIVERSITY, DEPARTMENT OF ADVANCED MATERIALS ENGINEERING) ;
  • BAGUS D. ERLANGGA (KEIMYUNG UNIVERSITY, DEPARTMENT OF ADVANCED MATERIALS ENGINEERING) ;
  • DALHYUN DO (KEIMYUNG UNIVERSITY, DEPARTMENT OF ADVANCED MATERIALS ENGINEERING) ;
  • SEONG-MIN LEE (UNIVERSITY OF INCHEON)
  • Published : 20200000
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Abstract

In this study, a simple and effective way to fabricate highly porous scaffolds with controlled porosity and pore size is demonstrated. Ti-7Zr-6Sn-3Mo shape memory alloy fibers were prepared through a melt overflow process. The scaffolds with porosity of 65-85% and large pores of 100-700 ㎛ in size were fabricated by sintering the as-solidified fibers. Microstructures and transformation behaviors of the porous scaffolds were investigated by means of SEM, DSC and XRD. The scaffolds were composed of β phase at room temperature. Superelasticity with the superelastic recovery strain of 7.4% was achieved by β ↔ α" phase transformation. An effect of porosity on mechanical properties of porous scaffolds was investigated by using compressive test. As the porosity increased from 65% to 85%, elastic modulus and compressive strength decreased from 0.95 to 0.06 GPa and from 27 to 2 MPa, respectively.

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Acknowledgement

This research was supported by Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education, Science and Technology (2017R1A2B4005693)