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    • Adaptive benchmarking design for additive manufacturing processesPeer reviewedClosed access 

      17 mars 2022, Spitaels, Laurent; Rivière-Lorphèvre, Edouard; DEMARBAIX, Anthoninorcid-id; Ducobu, François, HE Condorcet
      Article scientifique
      "Standards enabling the objective tolerancing and evaluation of dimensional and geometrical performances of additive manufacturing (AM) printers are still missing. The design, printing and measurements of geometrical benchmark test artefacts (GBTA) is the current solution proposed in literature. However, the current GBTA with fixed dimensions cannot cover most of the available printing area of ...

    • Behaviour of pre-sintered Y-TZP during machining operations: Determination of recommended cutting parametersPeer reviewedClosed access 

      06 février 2018, DEMARBAIX, Anthoninorcid-id; Rivière-Lorphèvre, Edouard; Ducobu, François; Filippi, Enrico; Petit, Fabrice; Preux, Nicolas, HE Condorcet
      Article scientifique
      "In this paper,the NF E 66-520-5 standard, dedicated to the determination ofthe optimal cutting parameters suitable for ductile material, is applied to the pre-sintered ceramic Y-TZP. The objective of the standard is to calculate the specific cutting energy of the forces created between the chosen tool and material during machining operation. Specific cutting energy is the energy required to remove ...

    • Binder influence on green ceramic machining by means of milling and laser machiningPeer reviewedOpen access 

      06 septembre 2021, DEMARBAIX, Anthoninorcid-id; Ducobu, François; Preux, Nicolas; Petit, Fabrice; Rivière-Lorphèvre, Edouard, HE Condorcet
      Acte de conférence ou de colloque
      "The micro manufacturing of ceramic components is technologically challenging especially when complex shapes and micro features are required. A hybrid manufacturing chain is developed for non-sintered(green) blanks machined using sequentially a cutting tool and a laser source. During the preparation of the green blank, a binder is added to the powder to improve compaction. The amount of binder can ...

    • Calibration method of hybrid machining process in the green ceramic combining micro-milling and laser machiningPeer reviewedClosed access 

      2019, DEMARBAIX, Anthoninorcid-id; Rivière-Lorphèvre, Edouard; Ducobu, François; Dolimont, Adrien; Petit, Fabrice; Juste, Enrique, HE Condorcet
      Acte de conférence ou de colloque
      Contribution to "euspen’s 19th International Conference & Exhibition, Bilbao, ES, June 2019" Abstract : "The requirements for quality amelioration of engineered products are increasingly stringent, and specially when the miniaturization and difficult-to-machine materials are considered. The development of hybrid machining processes (HMPs) answers this problem. Indeed, HMPs are variants of ...

    • Chemical etching as a finishing process for electron beam melting (EBM) partsPeer reviewedClosed access 

      02 juillet 2019, Dolimont, Adrien; DEMARBAIX, Anthoninorcid-id; Ducobu, François; Rivière-Lorphèvre, Edouard, HE Condorcet
      Acte de conférence ou de colloque
      "The goal of this research is to analyze the impact of chemical etching on parts produced by electron beam melting. Given that the surface conditions are poor (Ra between 25 to 35 µm), an enhancement of these is asked. Dimensional and surface measurements were realized on conceived parts. Different exposure times were tested. The impact of these times on surface quality was evaluated. To help ...

    • Development of a novel benchmark artifact for Additive Manufacturing processesPeer reviewedClosed access 

      10 juin 2021, Spitaels, Laurent; Rivière-Lorphèvre, Edouard; DEMARBAIX, Anthoninorcid-id; Ducobu, François, HE Condorcet
      Acte de conférence ou de colloque
      " This article aims to make a review of the existing benchmark artifacts and to summarize the main requirements chosen by authors. From this state of the art, a new benchmark artifact is proposed by adapting an existing one to fulfil its missing characteristics. Measurements possibilities in terms of dimensions are enumerated and organized using ISO 286 dimensional intervals as presented in the ...

    • Development of the hybrid sequential machining: laser machining and millingPeer reviewedClosed access 

      2016, DEMARBAIX, Anthoninorcid-id; Rivière-Lorphèvre, Edouard; Ducobu, François; Filippi, Enrico; Petit, Fabrice; Preux, Nicolas, HE Condorcet
      Acte de conférence ou de colloque
      "The aims of this paper is to study the advantages and disadvantages of laser micro-machining and the micro-milling. The final goal is to couple these processes in the same structure. The sequential hybrid process is subtractive-subtractive it combines the laser u-machining and the u-milling. The samples are machined with the two processes to compare the dimensional tolerance and the geometrical ...

    • Dimensional and geometrical performance assessment of two FDM printers using a benchmark artifactPeer reviewedClosed access 

      03 juin 2022, Spitaels, Laurent; Rivière-Lorphèvre, Edouard; DEMARBAIX, Anthoninorcid-id; Thielens, Vincent; Ducobu, François, HE Condorcet
      Acte de conférence ou de colloque
      "In this article, dimensional and geometrical performances of two Fused Deposition Modelling (FDM) printers with Cartesian architecture (Ultimaker S3 and Intamsys FUNMAT HT) are compared using an original benchmark artifact design. Five parts were printed on each printer in ABS. Five other parts were also produced with the Ultimaker S3 in PLA to show the influence of material choice on the printer’s ...

    • Experimental investigation on green ceramic machining with nanosecond laser sourcePeer reviewedClosed access 

      03 décembre 2020, DEMARBAIX, Anthoninorcid-id; Ducobu, François; Juste, Enrique; Petit, Fabrice; Duterte, Charles; Rivière-Lorphèvre, Edouard, HE Condorcet
      Article scientifique
      Abstract : "Yttrium oxide tetragonal zirconia polycrystals (Y-TZP) is an inert bioceramic used for many bio-implantable applications that request a high accuracy which is difficult to achieve with the current technologies. Laser machining of hard ceramic is difficult because the interaction of the laser beam with the material can lead to microcracks and surface modifications of the microstructure. ...

    • Green Ceramic Machining: Determination of the Recommended Feed Rate for Y-TZP MillingPeer reviewedOpen access 

      01 septembre 2021, DEMARBAIX, Anthoninorcid-id; Mulliez, Marylou; Rivière-Lorphèvre, Edouard; Spitaels, Laurent; Duterte, Charles; Petit, Fabrice; Ducobu, François, HE Condorcet
      Article scientifique
      Abstract : "Manufacturing of advanced ceramic parts exhibiting complex geometries is laborious and expensive. Traditionally, the machining is carried out on a so-called ‘green ceramic’: a compact composed of ceramic powder held with the help of a binder. This difficulty is due not only to the composition of the material, but also to the lack of methods that determine optimal machining parameters. ...

    • Green Ceramic Machining: Influence of the Cutting Speed and the Binder Percentage on the Y-TZP BehaviorPeer reviewedOpen access 

      21 mai 2020, DEMARBAIX, Anthoninorcid-id; Ducobu, François; Preux, Nicolas; Petit, Fabrice; Rivière-Lorphèvre, Edouard, HE Condorcet
      Article scientifique
      Abstract : "The demand for inert bioceramics is always increasing in the dental field. Yttrium oxide tetragonal zirconia polycrystals (Y-TZP) are oxide ceramics which are currently used because of their interesting mechanical properties due to a toughening transformation. Industrially speaking, machining of the ceramic before sintering (green body) is very common because it allows a better productivity ...

    • The Hybrid Machining of Ceramic: The choice of production stagePeer reviewedClosed access 

      30 mai 2017, DEMARBAIX, Anthoninorcid-id; Rivière-Lorphèvre, Edouard; Ducobu, François; Filippi, Enrico; Preux, Nicolas, HE Condorcet
      Acte de conférence ou de colloque
      Contribution to "Euspen’s 17th International Conference & Exhibition, Hannover, DE, May 2017". Abstract : "The demand for micro products has increased gradually since last decades in various areas, requiring the development of micro manufacturing processes. Micro manufacturing is characterized by the size of functional features (smaller than 10 um), a high precision, a good surface finishing and ...

    • Impact of Green Ceramic Hybrid Machining (GCHM) on Reliability and Repeatability of the Properties of Sintered Yttrium-Tetragonal Zirconia Polycrystal PartsPeer reviewedOpen access 

      20 juin 2023, Ducobu, François; DEMARBAIX, Anthoninorcid-id; Rivière-Lorphèvre, Edouard; Spitaels, Laurent; Petit, Fabrice; Preux, Nicolas; Duterte, Charles; Mulliez, Marylou; Lauwers, Bert, HE Condorcet
      Article scientifique
      Abstract : "The innovative Green Ceramic Hybrid Machining (GCHM) process sequentially combines milling with a cutting tool (GCM, Green Ceramic Machining) and laser beam machining (GCLBM) of a ceramic material (black Y-TZP in this study) at the green stage mainly to increase productivity, avoid taper angle limitations of laser beam machining, and obtain micro-features. The study focuses on ...

    • Influence of Conventional Machining on Chemical Finishing of Ti6Al4V Electron Beam Melting PartsPeer reviewedOpen access 

      26 avril 2020, Spitaels, Laurent; Ducobu, François; DEMARBAIX, Anthoninorcid-id; Rivière-Lorphèvre, Edouard; Dehombreux, Pierre, HE Condorcet
      Acte de conférence ou de colloque
      "Additive manufacturing is feeding great hopes for future developments in fields such as aeronautical, biomedical and rapid tooling industrssssies. However, limitations are still restricting its use to make prototypes and hampering mass production. In the case of titanium alloy printing (e.g. Ti6Al4V) with the EBM (Electron Beam Melting) process, the major obstacle to use parts directly after printing ...

    • A new manufacturing chain for ceramic shaping: sequential combination of milling and laser machining in green ceramicPeer reviewedOpen access 

      juin 2020, DEMARBAIX, Anthoninorcid-id; Ducobu, François; Petit, François; Rivière-Lorphèvre, Edouard, HE Condorcet
      Acte de conférence ou de colloque
      Contribution to euspen’s 20th International Conference & Exhibition (Geneva, CH, June 2020) Abstract : "The ceramic microcomponents have very interesting mechanical and thermal properties in an extreme environment such as a high temperature, a corrosive environment, etc. Unfortunately, the principal limitation of ceramic material usage is its shaping because of the brittlness of the material. ...

    • Prediction of local sintering in laser beam machining of green Y-TZP ceramicPeer reviewedOpen access 

      20 mai 2020, Ducobu, François; Rivière-Lorphèvre, Edouard; DEMARBAIX, Anthoninorcid-id; Lauwers, Berth, HE Condorcet
      Article scientifique
      Abstract : "Laser beam machining of Y-TZP engineering ceramic material is carried out in green stage to increase the material removal rate. The generation of hot spots may cause local sintering of the ceramic material leading to a decrease of the mechanical properties of the final sintered component. This paper presents the implementation of alternative laser beam paths to reduce the hot spots ...