Sliding wear behavior and microstructure change of deformation-processed Cu-20vol.%Nb in situ composite

Chen, Z.; Liu, P.; Verhoeven, J. D.; Gibson, Eli

doi:10.1016/0043-1648(95)90033-0

Cited by 1 publication

(2 citation statements)

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“…Scientific interest in microparticle adhesion is driven by its ubiquity in applications from granular materials handling , and filtration − to tribology and wear, − printing and coating, and cell − and bacterial capture. , Hydrodynamic forces are often critical, acting directly (for rigid materials) or indirectly (through the deformation of soft particles and substrates , ). The physicochemical surface forces that favor adhesion 13 are fre-quently complicated by chemical or topographical heteroge-neity, − making the range of possibilities quite rich, but also making systematic variation in surface chemistry challenging.…”

Section: Introductionmentioning

confidence: 99%

“…Scientific interest in microparticle adhesion is driven by its ubiquity in applications from granular materials handling 1,2 and filtration [3][4][5] to tribology and wear, [6][7][8] printing and coating, 9 and cell [10][11][12] and bacterial capture. 13,14 Hydrodynamic forces are often critical, acting directly (for rigid materials) or indirectly (through the deformation of soft particles and substrates 14,15 ).…”

Section: Introductionmentioning

confidence: 99%

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Hydrodynamic Crossover in Dynamic Microparticle Adhesion on Surfaces of Controlled Nanoscale Heterogeneity

Kalasin

Santore

2008

Langmuir

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This note documents the crossover from a regime where shear flow hinders microparticle adhesion on collecting surfaces to that where increased flow aids particle capture. Flow generally works against adhesion and successfully hinders particle capture when the net physicochemical attractions between the particles and collector are weak compared with hydrodynamic forces on the particle. Conversely, with strong attractions between particles and collector, flow aids particle capture by increasing the mass transport of particles to the interfacial region. Here, local hydrodynamics still generally oppose adhesion but are insufficient to pull particles off of the surface. Thus, flow actually increases the particle capture rate through the increased transport to the surface. These behaviors are demonstrated using 1 mum silica spheres flowing over electrostatically heterogeneous (length scales near 10 nm) collecting surfaces at shear rates from 22 to 795 s(-1). The net surface charge on the collector is varied systematically from strongly negative (pure silica) to strongly positive (a saturated polycationic overlayer), demonstrating the interplay between physicochemical and hydrodynamic contributions. These results clearly apply to situations where heterogeneous particle-surface interactions are electrostatic in nature; however, qualitatively similar behavior was previously reported for the effect receptor density on bacterial adhesion.

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