Determination of mechanical properties of thermally grown oxide on Fecralloy by nano-indentation

Zhao, Xiaofeng; Xiao, Ping

doi:10.1016/j.tsf.2007.05.014

Cited by 9 publications

(3 citation statements)

References 31 publications

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“…In contrast, the hardnesses slightly decrease from 37.8 ± 1.3 GPa to 34.9 ± 1.3 GPa, as the penetration depth increases. This could be attributed to both the indenter size effect and cracking during loading process . It is also noted that these values are considerably higher than those reported in literatures.…”

Section: Resultsmentioning

confidence: 49%

Onset Plastic Deformation and Cracking Behavior of Silicon Carbide under Contact Load at Room Temperature

Zhao

Langford

Shapiro

et al. 2011

Journal of the American Ceramic Society

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The room temperature onset plastic deformation and crack behavior of 3C-SiC under contact load were investigated using nanoindentation and transmission electron microscopy (TEM). During loading, abrupt bursts or pop-in in the load-displacement curves was observed at a depth of~60 nm. The 3C-SiC deforms elastically before the pop-in depth, but exhibits a plastic-elastic behavior after that. TEM observations reveal that the shear slip is the predominant deformation mechanism in 3C-SiC during indentation. The cracks usually initiate at the intersection of shear bands or grain boundary. In addition, theoretical analysis confirms that the pop-in event is associated with the onset plasticity of 3C-SiC.

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Section: Resultsmentioning

confidence: 49%

Onset Plastic Deformation and Cracking Behavior of Silicon Carbide under Contact Load at Room Temperature

Zhao

Langford

Shapiro

et al. 2011

Journal of the American Ceramic Society

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“…A variety of techniques have been employed to measure the elastic constants of thin films, for example, tensile test [7][8][9], substrate curvature technique [10][11][12][13], bulge test [14][15][16][17], microbeam bending or deflection technique [18,19], nanoindentation (NIP) [20][21][22][23][24][25][26][27], resonant ultrasound spectroscopy [28][29][30], surface guided wave technique [31][32][33], X-ray diffraction (XRD) technique [34,35], combination of 2 sin ψ X-ray diffraction and laser curvature methods [36,37], combination of acoustic microscopy and nanoindentation method [38,39]. Among the above-mentioned methods, it is available in a few cases that the methods are able to simultaneously determine the Poisson's ratio and Young's modulus of elasticity for functional thin films and thin film structures, but usually either Poisson's ratio or modulus of elasticity should be assumed a priori for determining the other one.…”

Section: Introductionmentioning

confidence: 99%

A practical method for simultaneous determination of Poisson’s ratio and Young’s modulus of elasticity of thin films

et al. 2011

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In this paper, based on the exact analytical solution of axisymmetric deformation of the circular membrane fixed at its edge under the action of uniformly-distributed loads, we propose a new method to be able to simultaneously determine Poisson's ratio and Young's modulus of elasticity for thin films. We also present a set of exact formulas used for simultaneously determining Poisson's ratio and Young's modulus of elasticity for free-standing thin films or coating thin films without residual stresses or pre-tension. This method has the advantages of simplicity and reliability, and it doesn't involve the substrate effect.

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“…It has been reported that a material with a low ratio of hardness to its Young's modulus (H/E) has a high degree of plastic deformation [33], therefore it is important to express the H/E ratio to examine the deformation capability of TBCs. Fig.…”

Section: Phase Transformation and Mechanical Properties Of Tbcsmentioning

confidence: 99%

Mechanical and electrical characterisation of a phase transformation in thermal barrier coatings

Shinmi

Zhao

Xiao

2010

Surface and Coatings Technology

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The electrical and mechanical properties of atmospheric plasma sprayed (APS) yttria stablised zirconia (YSZ) thermal barrier coatings (TBCs) were determined using impedance spectroscopy and an indentation technique, respectively. Upon thermal exposure, sintering and phase transformation occurs in the YSZ TBCs, leading to changes in both the mechanical and electrical properties of the TBCs. After the thermal treatment, the formation of the monoclinic phase in the YSZ TBCs reduced the density of the TBCs and thus affected both the mechanical properties and conductivity of the TBCs. In this study, a relationship between the electrical and mechanical properties of APS TBCs has been established, allowing us to evaluate the properties of TBCs nondestructively with the use of impedance spectroscopy.

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Determination of mechanical properties of thermally grown oxide on Fecralloy by nano-indentation

Cited by 9 publications

References 31 publications

Onset Plastic Deformation and Cracking Behavior of Silicon Carbide under Contact Load at Room Temperature

Onset Plastic Deformation and Cracking Behavior of Silicon Carbide under Contact Load at Room Temperature

A practical method for simultaneous determination of Poisson’s ratio and Young’s modulus of elasticity of thin films

Mechanical and electrical characterisation of a phase transformation in thermal barrier coatings

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