Stress heterogeneity of thermally grown polycrystalline nickel oxide layers

Bulk and coated materials shear modulus determination by means of torsional resonant method

“…Shear modulus-temperature curves for various isotropic materials. 60 m thick anisotropic columnar structures are developed while oxidations at about 850 • C present 40 m thick quasi-isotropic equiaxed/columnar duplex microstructures [13].…”

Redox stability of SOFC: Thermal analysis of Ni–YSZ composites

“…Whether or not dynamic healing occurred depended on the strain rate. Milhet et al found high oxide film growth stress heterogeneity in thermally grown NiO films [26]; also Atkinson found ridge formations on NiO grain surfaces due to plastic deformation [27], indicating high local stresses. Huntz et al report that for industrial grade oxidised nickel the metal/oxide interface is more resistant to fracture than the oxide/oxide interface [28]; thus, micro cracking could be expected in the oxide scale.…”

Oxidation of Ni electrode in BaTiO3 based multilayer ceramic capacitor (MLCC)

“…Meanwhile, the compressive stress develops in the oxide film, and the tensile stress accordingly occurs in the Ni layer. Milhet et al [16] reported the difference in thermal shrinkage between Ni/NiO, which would induce tensile stress in Ni as it cooled from thermal treatment due to its higher coefficient of thermal expansion (CTE). Hence, tensile stress in the Ni layer appeared first during oxidation and was exaggerated during the cooling step.…”