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Impact of Green Ceramic Hybrid Machining (GCHM) on Reliability and Repeatability of the Properties of Sintered Yttrium-Tetragonal Zirconia Polycrystal Parts
20 juin 2023,
- HE Condorcet
,
- Article scientifique
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 ...
Development of a novel benchmark artifact for Additive Manufacturing processes
10 juin 2021,
- HE Condorcet
,
- Acte de conférence ou de colloque
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 ...
Green Ceramic Machining: Influence of the Cutting Speed and the Binder Percentage on the Y-TZP Behavior
21 mai 2020,
- HE Condorcet
,
- Article scientifique
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 ...
Green Ceramic Machining: Determination of the Recommended Feed Rate for Y-TZP Milling
01 septembre 2021,
- HE Condorcet
,
- Article scientifique
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. ...
A new manufacturing chain for ceramic shaping: sequential combination of milling and laser machining in green ceramic
juin 2020,
- HE Condorcet
,
- Acte de conférence ou de colloque
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. ...
Calibration method of hybrid machining process in the green ceramic combining micro-milling and laser machining
2019,
- HE Condorcet
,
- Acte de conférence ou de colloque
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 ...
The Hybrid Machining of Ceramic: The choice of production stage
30 mai 2017,
- HE Condorcet
,
- Acte de conférence ou de colloque
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 ...
Development of the hybrid sequential machining: laser machining and milling
2016,
- HE Condorcet
,
- Acte de conférence ou de colloque
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 ...
Experimental investigation on green ceramic machining with nanosecond laser source
03 décembre 2020,
- HE Condorcet
,
- Article scientifique
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. ...
Behaviour of pre-sintered Y-TZP during machining operations: Determination of recommended cutting parameters
06 février 2018,
- HE Condorcet
,
- Article scientifique
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 ...