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DOI : 10.4028/www.scientific.net/AMR.89-91.238

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Advanced Materials Research 89-91 (2010) 238-243

FEM CALCULATIONS AND EXPERIMENTAL DETERMINATION OF RESIDUAL STRESSES IN ALUMINA/NICKEL ALLOY JOINTS. OPTIMIZATION OF FABRICATION PARAMETERS

Lamine Hattali 1, 2, Stéphane Valette 1, Francois Ropital 2, Nadir Mesrati 1, Daniel Tréheux 1

IFP Energies nouvelles Collaboration(s)

(20/01/2010)

The study relates to joints fabricated by solid state bonding between alumina and nickel alloy HAYNESTM214®, using an intermediate nickel metallic foil. Experimentally, damages and cracks often are observed close to the metal/ceramics interface. Consequently, the residual stresses distributions in the specimen were characterized experimentally using X-ray diffraction (XRD) and indentation techniques and predicted by Finite Element Analysis (FEA) calculations using an elastic-plastic-creep model. We demonstrate that a good correlation between FEA calculations and experimental results is obtained. Then, the effect of elaboration and geometrical parameters has been studied in order to minimize the residual stresses in alumina close to the metal-ceramics interface. However, the Al2O3/Ni/HAYNESTM214® system always leads to high residual stresses. To solve this problem, we show that the use of a multi-layer Cu/Ni/Cu joint, associated with the Direct Copper Bonding method (DCB), by pre-oxidation of copper, allows reducing significantly the tensile residual stresses in ceramics.

1 :	Laboratoire de Tribologie et Dynamique des Systèmes (LTDS)
	CNRS : UMR5513 – Ecole Centrale de Lyon – Ecole Nationale d'Ingénieurs de Saint Etienne
2 :	IFP Energies Nouvelles (IFPEN)
	IFP Energies Nouvelles

Domaine

:

Chimie/Matériaux Sciences de l'ingénieur/Matériaux Sciences de l'ingénieur/Mécanique

Mots Clés : solid state bonding – residual stress – X-ray diffraction – indentation – FEA simulation

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Contributeur : Lamine Hattali <>

Soumis le : Mardi 10 Janvier 2012, 10:47:45

Dernière modification le : Mardi 10 Janvier 2012, 11:11:09