Thesis Topic

Hybrid surface treatment based on physical vapor deposition and thermochemical treatment for sintered metal parts
Amélioration des propriétés de surfaces par traitement hybrides PVD – thermo-chimique de subtrats conventionnels et par métallurgie des poudres

Abstract

The aim of this PhD thesis is the development of a new surface treatment, which consists on combining firstly a metallic PVD layer coating followed by a thermochemical treatment. The produced hard coating should have an adequate gradient of properties to enhance mechanical surface performance (hardness, abrasion resistance, low coefficient of friction, etc.). To reach these goals, it is required to control both PVD deposition (layer composition, residual stress) and thermochemical (diffusion depth, hardness) parameters. The influence of substrate grain size on light element diffusion will also be studied to control the gradient of properties. The layer compound selected for this work is TiC, firstly deposited on sintered pure iron in order to understand the reactivity between only three elements, and secondly on a sintered austenitic stainless steel, 316L.

Doctoral advisors

• Corinne NOUVEAU - Director,
• Dominique COTTON

Partners

• Université de Bourgogne (ICB)

Project

PhD in the frame of the THEMPO2 project

Funding

• The Bourgogne-Franche-Comté Regional Council

Start

1st of October 2022

Expected end

30th of September 2025