Elaboration of PIM feedstocks with 316L fine stainless steel powders for the processing of micro-components

Abstract

HAL is a multidisciplinary open access archive for the deposit and dissemination of scientific research documents, whether they are published or not. The documents may come from teaching and research institutions in France or abroad, or from public or private research centers. L'archive ouverte pluridisciplinaire HAL, est destinée au dépôt et à la diffusion de documents scientifiques de niveau recherche, publiés ou non, émanant des établissements d'enseignement et de recherche français ou étrangers, des laboratoires publics ou privés.

Development and Analysis of Feedstocks to Improve Injection for Surgical Instruments

“…Stainless steel AISI 316L is becoming an excellent candidate for applications of microcomponents that are used for medical purposes, since this alloy has good mechanical characteristics, excellent corrosion resistance and biocompatibility properties [1,2]. Due to the properties already described above, the AISI 316L alloy was used to develop injectable feedstocks because it has mechanical, thermal, esthetic, sanitary, bacteriological and biocompatible characteristics [3] needed for the use proposed in the present work, since the components made will be used inside a patient's body [4].…”

“…The auxiliary polymers are characterized by their low molecular weight, and their main function is to make the mixing process easier, since it alters the wettability of the interface between the metal particle and the thermoplastic. Besides, it helps reduce the temperature needed for the mixture fusion as a whole [2]. Surfactants are responsible for promoting the interaction of the polar molecules with the non-polar molecules, forming a bridge between the organic fraction and the inorganic fraction.…”

Development and Characterization of a Metal Injection Molding Bio Sourced Inconel 718 Feedstock Based on Polyhydroxyalkanoates

“…It has to be able to support an important load rate of powder, typically 60%, and to carry the powder in the mold. Enneti, Quinard and Tam [2][3][4] showed that the binder must give strength and cohesion to the molded part and be easily removed from the molded part, while being recyclable, environmentally friendly and economical. These authors also explained the importance of a low viscosity, good adhesion to the powder, no chemical reaction with the powder which can contaminate the powder or scissor the polymeric chains, and a low coefficient of thermal expansion for binders.…”

“…A micro powder was chosen because it is well adapted for µMIM experiments, including injection, debinding and sintering stages [3,10]. The use of Inconel for MIM process has been studied by Özgün [11] and a formulation was developed.…”

Development and identification of rheological model adapted for Powder Injection Moulding

“…Researches on PIM process have had important developments in the last 20 years [1,2,3]. The feedstock plays a primary and decisive role on dimensions and mechanical properties of the PIM products.…”