Skip to Main content Skip to Navigation
Theses

Etude, caractérisations et développement de mélanges de polymères biosourcés chargés de poudre d'Inconel 718 pour l'élaboration de composants et micro-composants via moulage par injection de poudres métalliques

Abstract : The works done during this PhD focuses on the study of the thermo-physical behavior of bio sourced polymer blends loaded with Inconel 718 powder (feedstock) to be shaped by the Metal Injection Molding process (MIM). First, a review of the researches related to the MIM process was conducted to identify innovative materials and processes that can improve the MIM process. Thus, the use of polyethylene glycol (PEG), selected for its properties of solubility in water, and bio sourced polymers, in order to reduce the environmental impact, were selected. The bio sourced polymers have been selected in accordance with the conditions of the injection molding process, and the choice was made to use polylactic acid (PLA) and polyhydroalkanoates (PHA and PHBV). Similarly, the supercritical CO2 as solvent was chosen to reduce the time of binder removal as well as increasing the quality of components produced. Thermo-physical, mechanical and rheological characterizations were made to determine the behavior of the different feedstock formulations. The results showed a degradation of the PEG and of the stearic acid under the conditions of use of the biopolymers, during the mixing and the injection stages. The use of feedstock made of bio sourced polymers have improved the homogeneity of the injected components, but they have generated defects during the debinding step. These defects have been eliminated by the use of CO2 in the supercritical state as solvent of the PEG. This method has significantly decrease the time of binder removal and improved the quality of the final components. Finally, densified components have the mechanical properties corresponding to Inconel 718.
Complete list of metadatas

Cited literature [108 references]  Display  Hide  Download

https://tel.archives-ouvertes.fr/tel-01651199
Contributor : Abes Star :  Contact
Submitted on : Tuesday, November 28, 2017 - 5:40:25 PM
Last modification on : Wednesday, September 16, 2020 - 10:42:49 AM

File

These_A_ROYER_Alexandre_2016.p...
Version validated by the jury (STAR)

Identifiers

  • HAL Id : tel-01651199, version 1

Citation

Alexandre Royer. Etude, caractérisations et développement de mélanges de polymères biosourcés chargés de poudre d'Inconel 718 pour l'élaboration de composants et micro-composants via moulage par injection de poudres métalliques. Mécanique des matériaux [physics.class-ph]. Université de Franche-Comté, 2016. Français. ⟨NNT : 2016BESA2058⟩. ⟨tel-01651199⟩

Share

Metrics

Record views

972

Files downloads

2566