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Volume fraction

About: Volume fraction is a research topic. Over the lifetime, 16312 publications have been published within this topic receiving 374181 citations.


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Journal ArticleDOI
TL;DR: In this paper, the microstructure and mechanical properties of two-phase α+β titanium alloys after different heat treatment were investigated and the influence of the morphology of lamellar microstructures and phase composition on the tensile properties and fracture toughness of the alloys was studied.

284 citations

Journal ArticleDOI
TL;DR: The microstructure and scaling of dense colloidal gels were investigated as a function of volume fraction and strength of interparticle attraction in this paper, where the gelled suspension was presheared, just after the shear rate was set to zero, elastic moduli were small.
Abstract: The microstructure and scaling of mechanical properties of dense colloidal gels were investigated as a function of volume fraction and strength of interparticle attraction. Gels were reversibly formed by cooling suspensions of octadecyl silica particles in decalin or tetradecane. Shear history independence of mechanical properties was ensured by preshearing the suspensions in the gelled state. Gelation resulted in suspensions with apparent fractal dimensions of 1.4. Shear densification resulted in an apparent fractal dimension of 2.5 for structures containing many particles. When the gelled suspension was presheared, just after the shear rate was set to zero, elastic moduli were small. Over time, the moduli recovered to a time independent value, G∞′, at a rate α. When measured over a wide range of volume fraction, φ, and strength of interparticle attraction, G∞′, α, and the strain limiting the extent of linear response to oscillatory deformations, γM, fell onto master curves when plotted as a function of ...

282 citations

Journal ArticleDOI
TL;DR: In this article, the authors analyzed the magnetohydrodynamic (MHD) nanofluid flow and heat transfer between two horizontal plates in a rotating system and determined the velocity and temperature profiles as well as the skin friction coefficient and the Nusselt number numerically.

282 citations

Journal ArticleDOI
TL;DR: Investigation of the yielding behaviour of frustrated colloid–polymer systems with equal attraction strength and range indicated distinct shear rate regimes: At steady state, low and intermediate shear rates create denser or smaller flowing clusters, whereas high rates may lead to complete break-up into independent particles.
Abstract: Steady and oscillatory rheology was utilized to study the mechanical response of colloidal glasses and gels with particular emphasis in their yielding behaviour. We used a suspension of hard sphere colloidal particles with short-range depletion attractions induced by the addition of non-adsorbing linear polymer. While high volume fraction hard sphere glasses exhibit a single yield point due to cage breaking, attraction dominated glasses show a two-step yielding reflecting bond and cage breaking, respectively. Here we investigated the yielding behaviour of frustrated colloid–polymer systems with equal attraction strength and range, varying the particle volume fraction, φ, spanning the region from an attractive glass (φ = 0.6) to a low volume fraction (φ = 0.1) attractive gel. Yielding throughout this range, probed both by oscillatory and steady shear, is found to remain a two step process until very low φ's. The first yield strain related with in-cage or inter-cluster bond braking remains constant for φ > 0.3 while the second yield strain, attributed to braking of cages or clusters into smaller constituents, increases as volume fraction is decreased due to enhancement of structural inhomogeneities in the gel. Steady shear tests indicated distinct shear rate regimes: At steady state, low and intermediate shear rates create denser or smaller flowing clusters, whereas high rates may lead to complete break-up into independent particles. When the range of attraction was increased, both yield strains increased scaling with the range of attraction and accompanied structural changes. Finally, ageing leads to an overall strengthening of both the gel and the attractive glass accompanied by an enhancement of the second stress overshoot in steady shear, while the attractive glass also becomes more brittle.

281 citations

Journal ArticleDOI
TL;DR: In this article, a simple precipitation technique was used to synthesize 8 nm CuO nanoparticles of average diameter 8 nm and the authors studied the thermal properties of the suspensions and found that the thermal conductivity increases nonlinearly with the volume fraction of nanoparticles.

280 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
2023965
20222,020
2021744
2020736
2019786
2018696