A computational and experimental study on the effective properties of Al₂O₃‐Ni composites

Abstract

It has been demonstrated that effective medium approximation and mean field homogenization technique is a useful computational tool to predict the effective thermal and structural properties of alumina‐nickel (Al2O3‐Ni) composites. Nickel particle size and volume fraction, thermal interface resistance and porosity are found significant factors that affect thermal conductivity, elastoplastic behavior, elastic modulus and thermal expansion coefficient of Al2O3‐Ni composite. To complement the computational design, Al2O3‐Ni composite samples with designed range of volume fractions and nickel particle size are developed using spark plasma sintering process and properties are measured for model verification.

Computational design and development of high-performance polymer-composites as new encapsulant material for concentrated PV modules

“…elastic modulus and coefficient of thermal expansion (cte). Akhtar et al 3 have found a good agreement between the experimentally measured CTE and the one predicted by mean-field homogenization of Mori-Tanaka as outlined by Benveniste and Dvorak 28 . According to the mean-field homogenization scheme the effective properties are estimated using the Eqs.…”

“…According to the mean-field homogenization scheme the effective properties are estimated using the Eqs. (1) to (3). C eff and α eff are the homogenized stiffness tensor and the effective CTE of the resulting composite, respectively whereas C and α represent stiffness tensors and CTE, respectively…”

“…The composite attributes such as type of matrix and fillers, their volume fractions, particle size, etc. are selected based on a particular set of target properties for enhanced performance of intended application 3,4 .…”

Advances in biocermets for bone implant applications

“…In addition, there are always large differences in the thermal expansion coefficients between metal phase and ceramic phase, which also easily leads to a poor bonding at the phase interfaces during the heating and cooling process [154][155][156][157]. For example, Lu et al [158] observed holes in the two-phase interface of sintered A1 2 O 3 /nickel (Ni) cermet due to the different thermal expansion coefficients of Ni and A1 2 O 3 , which could reduce the interface bonding force and adversely affected the mechanical properties of the cermet. Moreover, chemical reactions are easy to occur in the interface of solid and liquid phases during the preparation process.…”

Design and development of thermally conductive hybrid nano‐composites in polysulfone matrix

“…that can lead to achieve the expected structural and thermal properties. Akhtar et al , for example, have reported a design scheme for composite materials. Using the predictions of appropriate properties estimation models, they estimated the required particle size and volume fraction of filler for reaching a targeted set of structural and thermal properties.…”