Network


Latest external collaboration on country level. Dive into details by clicking on the dots.

Hotspot


Dive into the research topics where Dominique Hertz is active.

Publication


Featured researches published by Dominique Hertz.


Thin Solid Films | 2000

Low temperature ZrB2 remote plasma enhanced chemical vapor deposition

J.F. Pierson; Thierry Belmonte; T. Czerwiec; Dominique Hertz; H. Michel

Abstract Deposition of zirconium diboride films on Zircaloy-4 substrates at 733 K over 20 cm is carried out by remote plasma enhanced chemical vapor deposition (RPECVD). Different post-discharge compositions (Ar–H 2 , Ar–H 2 –BCl 3 and Ar–BCl 3 ) are tested in several process configurations. Experiments performed by thermal CVD and RPECVD with Ar–H 2 post-discharge show that the deposition of ZrB 2 films on oxidized Zircaloy-4 is impossible at temperature lower than 853 K. Ar–H 2 –BCl 3 post-discharges do not give to adherent films on oxidized Zircaloy-4 at a temperature lower than 753K. It is shown that ZrB 2 thin films can be synthesized by using flowing Ar–BCl 3 microwave post-discharges. Chlorine must etch the zirconia protective layer before zirconium diboride is synthesized. Therefore, the control of thickness of this zirconia layer by a previous oxidation treatment gives homogeneous deposition. The structure of the films has been determined to be nanograins of ZrB 2 dispersed in an amorphous solid solution of boron and zirconium oxides. The origin of the boron species incorporated in the ZrB 2 films is attributed to the eching of the quartz tube by chlorine.


Thin Solid Films | 1997

Low temperature zirconia thin film synthesis by a chemical vapour deposition process involving ZrCl4 and O2–H2–Ar microwave post-discharges. Comparison with a conventional CVD hydrolysis process

J. Gavillet; Thierry Belmonte; Dominique Hertz; H. Michel

Thin films of zirconia have been deposited at 733 K and below by microwave post-discharge-assisted oxidation of ZrCl4 in O2–H2–Ar mixtures, leading to monoclinic layers with a columnar morphology. The highest deposition rates were obtained when both H2 and O2 passed through the discharge, with a flowrate ratio of H2/O2=2. The results have been compared with those for a conventional chemical vapour deposition (CVD) process based on the hydrolysis of ZrCl4. Together with information gained on the post-discharge process using other investigation methods, such as mass spectrometry and measurements of atomic oxygen concentrations by NO titration, they have helped to shed light on the reaction paths. The mechanism leading to zirconia formation has been identified as being a simple hydrolysis reaction in the late post-discharge. The microwave post-discharge-assisted O2–H2–Ar process thus seems to behave like a conventional CVD technique in the temperature range from 573 to 733 K.


Materials and Manufacturing Processes | 1991

CHEMICAL VAPOR DEPOSITION OF CHROMIUM OXIDE (Cr2O3) COATINGS ON METAL SUBSTRATES FROM CHROMIUM ACETYLACETONE (C5H7O2) 3 - Cr

H.I. Chbihi; S. Audisio; Francoise Defoort; Dominique Hertz

Abstract A chromium oxide (Cr2O3) coating was obtained on metal substrates (steel, alloy steel, etc.) by thermal decomposition of chromium acetylacetone (AA-Cr) in oxygen. The nature and quality of these coatings were investigated by a variety of analysis techniques: X ray Diffraction, Raman Spectrometry, Glow Discharge Spectrometry, Scanning Electron Microscopy and Optical Microscopy. Analysis of the influence of the substrate and precursor temperature, of the flowrate of the carrier gas (Ar) and of the reagent (O2) led to determination of the optimum coating conditions.


Wear | 2004

Tribocorrosion of stellite 6 in sulphuric acid medium: electrochemical behaviour and wear

Lidia Benea; Pierre Ponthiaux; F. Wenger; J. Galland; Dominique Hertz; J.Y Malo


Wear | 2013

Mechanical and chemical mechanisms in the tribocorrosion of a Stellite type alloy

Sandra Guadalupe Maldonado; Stefano Mischler; Marco Cantoni; Walter-John Chitty; Carole Falcand; Dominique Hertz


Wear | 2013

Surface impact analysis in shot peening process

C. Nouguier-Lehon; M. Zarwel; C. Diviani; Dominique Hertz; Hassan Zahouani; T. Hoc


Archive | 1995

Process for coating a passivatable metal or alloy substrate with an oxide layer, and fuel assembly cladding and guide tubes and spacer grid coated with an oxide layer

Dominique Hertz; Thierry Belmonte; Jérôme Gavillet; Henri Michel


Archive | 1995

Neutron-absorbent control cluster for a nuclear reactor

Dominique Hertz; Luc Pillet


Archive | 1987

Stainless steel tubular element with improved wear resistance

Dominique Hertz; Jean-Michel Couturier


Archive | 2003

Cluster for adjusting a nuclear reactor core reactivity, absorber rod of the cluster and method for protecting the absorber rod against wear

Dominique Hertz; Yves Desprez

Collaboration


Dive into the Dominique Hertz's collaboration.

Researchain Logo
Decentralizing Knowledge