Hybrid metal-ceramic biomaterials fabricated through powder bed fusion and powder metallurgy for improved impact resistance of craniofacial implants
ID Rahmani, Ramin (Author), ID Kamboj, Nikhil (Author), ID Brojan, Miha (Author), ID Antonov, Maksim (Author), ID Prashanth, Konda Gokuldoss (Author)

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The mechanical compliance of craniofacial implants is of paramount importance in the medical field, as the primary concern is to protect the cerebrum after trauma or neurosurgical operation. To develop novel cranial implants, three types of bioactive ceramic powders were embedded in the metallic scaffolds. The scaffolds were fabricated by combining powder bed fusion technology and powder metallurgy. Ti6Al4V lattice structures fabricated by selective laser melting were filled with three different wollastonite-based bioceramics applied for critical-sized craniofacial defects: 1. CaSiO3 (wollastonite, W), 2. Si-CaSiO3 (50 wt.% silicon-wollastonite, W-Si) and 3. CaSiO3single bondCa3(PO4)2−MgCa(SiO3)2 (62 wt.% wollastonite ceramic glass, W62) by spark plasma sintering. The mechanical behavior of the Ti6Al4V-CaSiO3 hybrid metal-ceramic biomaterial composite was evaluated by the dynamic impact test designed by the authors. Furthermore, the proposed fabrication process implies that the metallic scaffolds can bear the mechanical loads, hold the composite structure together, and deliberately induced cracks/pores in the ceramic region can be exploited for drug delivery. Except Ti6Al4V which is known for implants, the potential of using TiNi and Ti22Al25Nb is investigated here for dynamic impact-resistance applications. Due to ductility of TiNi and rigidity of Ti22Al25Nb, an average stress distributed in structures under loading is approximately 600, 550 and 400 MPa for Ti6Al4V, TiNi, and Ti22Al25Nb, respectively. Results show declination in the level of porosity from ceramic (W) to metalloid-ceramic (W-Si) and ceramic-glass (W62) in the composite, respectively, and limited cracking in the impact region of the ceramic and the metallic struts interface when subjected to multiple dynamic impacts.

Keywords:selective laser melting, hybrid metal-ceramic biomaterial, craniofacial implants
Work type:Article (dk_c)
Typology:1.01 - Original Scientific Article
Organization:FS - Faculty of Mechanical Engineering
Publication status in journal:Published
Article version:Preprint, working version of article, not peer-reviews
Publication date:30.05.2022
Number of pages:12 str.
Numbering:Vol. 24, art. 101465
PID:20.500.12556/RUL-137249 This link opens in a new window
ISSN on article:2589-1529
DOI:10.1016/j.mtla.2022.101465 This link opens in a new window
COBISS.SI-ID:110758403 This link opens in a new window
Publication date in RUL:08.06.2022
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Record is a part of a journal

Publisher:Elsevier Ltd.
COBISS.SI-ID:43267075 This link opens in a new window

Secondary language

Keywords:selektivno lasersko taljenje, hibriden kovinsko-keramični biomaterial, kraniofacialni implanti


Funder:Drugi - Drug financer ali več financerjev
Funding programme:Estonian Ministry of Education and Research grant
Project number:PRG 643

Funder:Drugi - Drug financer ali več financerjev
Funding programme:European Regional Development Fund
Project number:ASTRA6–6

Funder:ARRS - Agencija za raziskovalno dejavnost Republike Slovenije (ARRS)
Project number:P2-0263
Name:Mehanika v tehniki

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