Francis Delannay

TL;DR: In this paper, the precursors of unsupported CoMo sulfide catalysts with concentration ratios, r = Co/(Co + Mo), varying from 0 to 1 were prepared by four different methods: comaceration (CM), homogeneous sulfide precipitation (HSP), inverse HSP (IHSP); coprecipitation (CP); and differential thermal analysis (DTA) was used to investigate successively the thermal decomposition (under argon) or the reduction/sulfidation (under 15% H 2 S/H 2 mixture).

TL;DR: In this article, the effects of vanadium and rhenium additions on the creep properties of directionally solidified eutectic γ/γ'-α alloys with nominal composition Ni-31Mo-6Al, Ni-32Mo-1.4V 1.2Re (wt.%) have been determined using strain rate change test, which was conducted under vacuum at temperatures between 1223 and 1323 K. The steadystate stress has been found to depend strongly on creep rate and temperature.

TL;DR: In this paper, the basic science underneath the phenomenon of thermal expansion in composite materials is presented on the basis of a comprehensive review of literature, and three cases are discussed successively: (1) pure elastic behavior of the phases; (2) plastic yielding in the matrix; (3) role of porosity and damage.

TL;DR: In this article, a micromechanical model for dual phase elastoplastic materials is developed using the equivalent inclusion theory and a mean field approach, which is written in the framework of the J(2) deformation theory for ellipsoYdal inclusions.

TL;DR: In this article, the influence of dihedral angle and particle coordination on the evolution of densification rate is investigated throughout the intermediate and final stages of sintering, and heuristic expressions are proposed for representing different trajectories of evolution of coordination from the onset of skeleton formation up to full density.