Abstract
Powder injection molding (PIM) is a hybrid of powder metallurgy and plastic injection molding. It is used to develop metallic molded parts with intricate shapes and with improved properties compared with those offered by their wrought counterparts. PIM dental implants should exhibit biocompatibility, high density, good dimensional control, homogeneous properties and low manufacturing cost. In order to achieve these properties, the effect of boron (additive) addition on sintered density and of process effects on the biocompatibility of sintered implants was studied. In activated sintering, additives are used in small quantities to modify the sintering behavior of stainless steel. A constant amount of nanosize elemental boron (0–1.5 wt%) was admixed with 316L stainless steel and was compounded with complex binder to develop feedstocks using a z-blade mixer. Optimal solvent debinding parameters followed by an optimal sintering cycle played a vital role in the development of biocompatible and densified 316L stainless steel dental implants. Although all boron-containing formulations were injection-molded successfully, only PWA-0.5B-1230 samples were able to retain their shapes after sintering. It was concluded that 0.5 wt% addition of elemental boron favored the formation of 316L stainless steel with a sintered density of up to 98.5 % through the formation of a complex iron boride compound (B6Fe23) on the grain boundaries during the sintering process. The formation of a passive layer on the outer surface of implants was controlled using optimal sintering parameters. In in vitro analysis, the cytotoxicity assessment of sintered dental implants materials was determined using the direct and indirect contact techniques.
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Xu F., Niu Y., Hu X.F., Li Y.C., Qu H.Y., Kang D.: Role of Second Phase Powders on Microstructural Evolution During Sintering. Experimental Mechanics 54, 57–62 (2014)
Fornabaio, M.; Palmero, P.; Traverso, R.; Esnouf, C.; Reveron, H.; Chevalier, J.; et al.: Zirconia-based composites for biomedical applications: role of second phases on composition, microstructure and zirconia transformability. J. Eur. Ceram. Soc. 14, 4039–4049 (2015)
Aslam M., Ahmad F., BintiMegat Yusoff P.S.M., Muhamad N., Raza M.R., Irfan Shirazi M.: Effects of Admixed Titanium on Densification of 316L Stainless Steel Powder during Sintering. MATEC Web of Conferences 13, 04026 (2014)
Raza M.R., Ahmad F., Muhamad N., Sulong A.B., Omar M.A., Akhtar M.N. et al.: Effects of solid loading and cooling rate on the mechanical properties and corrosion behavior of powder injection molded 316L stainless steel. Powder Technology 289, 135–142 (2016)
Aslam M., Ahmad F., Yusoff P.S.M.B.M., Altaf K., Omar M.A., German R.M.: Powder injection molding of biocompatible stainless steel biodevices. Powder Technology 295, 84–95 (2016)
German R., Munir Z.: The sintering of tantalum with transition metal additions. Powder Metallurgy 20, 145–150 (1977)
Smith J.T.: Diffusion Mechanism for the Nickel-Activated Sintering of Molybdenum. Journal of Applied Physics 36, 595–598 (1965)
German R.M., Munir Z.A.: Temperature sensitivity in the chemically activated sintering of hafnium. Journal of the Less Common Metals 46, 333–338 (1976)
Schetky L.M., Johnson H.A.: Beryllium Technology: Conference sessions 1–4, pp. 779. Gordon and Breach, New York (1966)
Palmour H., Johnson D., Kuczynski G., Hooton N., Gibbs C.: Sintering and Related Phenomena, pp. 779. Gordon and Breach, New York (1967)
Chakravarty D., Chokshi A.H.: Influence of yttria and zirconia additions on spark plasma sintering of alumina composites. Journal of Materials Research 30, 1148–1156 (2015)
Reshamwala A.S., Tendolkar G.S.: Powder-metallurgical review 1. Activated sintering, Part 1. Powder Met. Int. 1, 58 (1969)
Sorkhe Y., Aghajani H., Tabrizi A.T.: Mechanical alloying and sintering of nanostructured TiO 2 reinforced copper composite and its characterization. Materials & Design 58, 168–174 (2014)
German R., d’Angelo K.: Enhanced sintering treatments for ferrous powders. International Metals Reviews 29, 249–272 (1984)
Ye Y., Li X., Hu K., Qu S., Li Y.: Effects of Alloy Composition on Microstructure and Mechanical Properties of Iron-Based Materials Fabricated by Ball Milling and Spark Plasma Sintering. Metallurgical and Materials Transactions A 46, 476–487 (2015)
Raja Annamalai A., Upadhyaya A., Agrawal D.: Effect of heating mode and electrochemical response on austenitic and ferritic stainless steels. Canadian Metallurgical Quarterly 54, 142–148 (2015)
Prill, A.; Hayden, H.; Brophy, J.: The role of phase relationships in the activated sintering of tungsten. Trans. AIME 230 (1964)
Miramontes J.C., Sánchez J.B., Calderón F.A., Villafañe A.M., Nava J.C.: Effect of boron additions on sintering and densification of a ferritic stainless steel. Journal of materials engineering and performance 19, 880–884 (2010)
Brook R., Gilbart E., Shaw N., Eisele U.: Solid solution additives and the sintering of ceramics. Powder metallurgy 28, 105–107 (1985)
Gülsoy H., Gunay V., Baykara T.: Influence of TiC, TiN and TiC (N) additions on sintering and mechanical properties of injection moulded titanium based metal matrix composites. Powder Metallurgy 58, 30–35 (2015)
Seah M.P., Hondros E.D.: Grain Boundary Segregation. Proceedings of the Royal Society of London. A. Mathematical and Physical Sciences 335, 191–212 (1973)
Mahathanabodee S., Palathai T., Raadnui S., Tongsri R., Sombatsompop N.: Effects of hexagonal boron nitride and sintering temperature on mechanical and tribological properties of SS316L/h-BN composites.. Materials & Design 46, 588–597 (2013)
Szewczyk-nykiel, A.: The effect of the addition of boron on the densification, microstructure and properties of sintered 17-4 ph stainless steel wpływ dodatku boru na zagęszczenie, mikrostrukturę i właściwości spiekanej stali
Bakan H., Heaney D., German R.: Effect of nickel boride and boron additions on sintering characteristics of injection moulded 316L powder using water soluble binder system. Powder metallurgy 44, 235–242 (2001)
ISO-10993-5: Biological Evaluation of Medical Devices e Part 5: Tests for Cytotoxicity: In Vitro Methods. ANSI/AAMI, Arlington (1999)
Youseffi M., Menzies I.A.: Injection moulding of WC–6Co powder using two new binder systems based on montanester waxes and water soluble gelling polymers. Powder metallurgy 40, 62–65 (1997)
Aggarwal G., Park S.J., Smid I.: Development of niobium powder injection molding: Part I. Feedstock and injection molding. International Journal of Refractory Metals and Hard Materials 24, 253–262 (2006)
Li Y., Li L., Khalil K.: Effect of powder loading on metal injection molding stainless steels. Journal of Materials Processing Technology 183, 432–439 (2007)
Aslam, M.; Ahmad, F.; Yusoff, P.S.M.B.M.; Altaf, K.; Omar, M.A.; Abdul Khalil, H.P.S., et al.: Investigation of rheological behavior of low pressure injection molded stainless steel feedstocks. Adv. Mater. Sci. Eng. 2016, 9 (2016)
Mills P.: Non-Newtonian behaviour of flocculated suspensions. Journal de Physique Lettres 46, 301–309 (1985)
German R.: Powder Injection Molding, MPIF. Princeton, New Jersey (1990)
Gharehbaghi A.: Precipitation Study in a High Temperature Austenitic Stainless Steel Using Low Voltage Energy Dispersive X-ray Spectroscopy. Royal Institute of Technology, Stockholm (2012)
Raza, M.R.; Ahmad, F.; Muhamad, N.; Sulong, A.B.; Omar, M.; Akhtar, M.N., et al.: Effects of residual carbon on microstructure and surface roughness of PIM 316L stainless steel. In: InCIEC 2014, pp. 927–935. Springer, Berlin (2015)
Krauss G.: Steels: Processing, Structure, and Performance. ASM International, Almere (2005)
Rawers J., Croydon F., Krabbe R., Duttlinger N.: Tensile characteristics of nitrogen enhanced PIM 316L stainless steel. Bulletin du Cercle d’Etudes des Metaux(France) 16, 5 (1995)
Khor, K.: Dilatometry studies on water atomised stainless steel 316L powders. In: Powder Metallurgy World Congress (PM’94), pp. 1065–1068 (1994)
German R., Rabin B.: Enhanced sintering through second phase additions. Powder metallurgy 28, 7–12 (1985)
Gülsoy H.: Production of injection moulded 316L stainless steels reinforced with TiC (N) particles. Materials Science and Technology 24, 1484–1491 (2008)
German, R.M.: Sintering Theory and Practice. Sintering Theory and Practice, vol. 1, pp. 568. Wiley, New York (1996); ISBN 0-471-05786-X
Divinski S., Hisker F., Kang Y.-S., Lee J.-S., Herzig C.: 59Fe Grain Boundary Diffusion in Nanostructured \({\gamma}\)-Fe–Ni: Part I: Radiotracer Experiments and Monte-Carlo Simulation in the Type-A and B Kinetic Regimes. Zeitschrift für Metallkunde 93, 256–264 (2002)
Lin, S.J.; Feng, D.P.; Shi, Q.N.: Microstructure and mechanical properties of vacuum sintered austenitic stainless steel parts. Adv. Mater. Res. 160, 915–920 (2011)
Marucci M., Lawley A., Causton R., Saritas S.: Effect of Small Additions of Boron on the Mechanical Properties and Hardenability of Sintered P/M Steels. In: Arnhold, V., Chu, C.-L., Jandeska, W.F., Sanderow, H.I. (eds) Advances in Powder Metallurgy and Particulate Materials,compiled, pp. 53–63. MPIF, Princeton (2002)
Tang X.: Sigma phase characterization in AISI 316 stainless steel. Microscopy and Microanalysis 11, 78–79 (2005)
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Aslam, M., Ahmad, F., Yusoff, P.S.M.B.M. et al. Investigation of Boron Addition on Densification and Cytotoxicity of Powder Injection Molded 316L Stainless Steel Dental Materials. Arab J Sci Eng 41, 4669–4681 (2016). https://doi.org/10.1007/s13369-016-2224-1
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DOI: https://doi.org/10.1007/s13369-016-2224-1