Advancement of the artificial amorphous-crystalline structure of laser cladded FeCrMoCB on nickel-free stainless-steel for bone-implants

• Published in: Materials chemistry and physics 2019-04, Vol.227, p.358-367
• Main Authors: Ibrahim, Mahmoud Z., Sarhan, Ahmed A.D., Kuo, T.Y., Hamdi, M., Yusof, Farazila, Chien, C.S., Chang, C.P., Lee, T.M.
• Format: Article
• Language: English
• Subjects: Amorphous materials; Amorphous structure; Bio-wear; Biocompatibility; Biomedical materials; Body fluids; Bone implant; Clad metals; Cobalt base alloys; Corrosion rate; Corrosion resistance; Corrosion tests; Corrosive wear; Crystal structure; Crystallinity; Electrochemical corrosion; Electron microscopes; Fe-based metallic glass; In vitro methods and tests; Laser cladding; Lasers; Metallic glasses; Modulus of elasticity; Nanoindentation; Nickel; Substrates; Surgical implants; Titanium base alloys; Transplants & implants; Wear resistance; X-ray diffraction
• ISSN: 0254-0584; 1879-3312
• DOI: 10.1016/j.matchemphys.2018.12.104

This research proposes the development of amorphous-crystalline FeCrMoCB layer as a promising biomaterial for bone-implant applications. The FeCrMoCB amorphous powder was laser cladded on nickel-free stainless-steel (Cronidur30) using three laser specific energies (Es) levels (31.8, 27.5 and 23.4 J/mm2) to attain different amorphous contents. The amorphous-crystalline structure and the microstructure were investigated using X-ray diffraction and scanning electron microscope, respectively. Later, the corrosion rate and the wear rate in simulated body fluids (SBF) were evaluated to investigate the advancement of the artificial amorphous-crystalline structure of laser cladded FeCrMoCB metallic glass (MG) composite via electrochemical corrosion test and pin-on-disc test, respectively. The hardness and Young's modulus (E) were acquired using nanoindentation measurement while the cytocompatibility was evaluated by MTT assay using MC3T3 cell-lines. The material characterization showed that increasing of Es resulted in decreasing the amorphous phase and increasing the crystalline phase. The laser cladded FeCrMoCB MG composite showed significant enhancement of the corrosion and wear resistance in SBF implying longer implant service time. This advancement behavior is not only superior to the uncoated substrate, but also compared to other biomaterials including Zr-based MG, Ti6Al4V, and CoCrMo alloys in SBF. Finally, the FeCrMoCB MG composite showed an acceptable cytocompatibility behavior bringing promising enhanced characteristics for bone-implant material. •Fe-based metallic glass coating on Cronidur30 with three different amorphous content.•The coating layers were characterized using XRD and SEM.•FeCrMoCB MG composite coating layer showed superior corrosion and wear resistance in PBS.•The proposed coating layer has good biocompatibility.