Abrasion transfer

Fig. 10. Four elementary pellet growth mechanisms (a) snowballing (b) crushing and layering (c) coalescence (d) abrasion transfer. [From Sastry and Fuerstenau (S5).]...

Abrasive stripping voltammetry — Technique where traces of solid particles are abrasively transferred onto the surface of an -> electrode, followed by an electrochemical dissolution (anodic or cathodic dissolution) that is recorded as a current-voltage curve [i]. It allows qualitative and quantitative analysis of metals, alloys, minerals, etc. The technique is a variant of - voltammetry of immobilized particles [ii]. 

Solid electrodes, modified with microparticles attached onto the surface, can be assumed as the result of the usual abrasive transfer by rubbing, for example, a graphite rod over nanogram amounts of the respective sample. These adhered microparticles are randomly distributed over the surface, and the whole set-up can be understood and theoretically treated as random array of microdisk electrodes (unlike regular arrays, see Section 6.3.2.3) (Figure 6.12). 

Polymer wear can take place in various modes, e.g., adhesive, abrasive, transfer, fatigue, and tribo-chemical. In reality, several mechanisms can also operate simultaneously. If impaction is involved, an impact wear can be the chief mechanism. The predominance of any one type of wear can be influenced by the form of polymers, e.g., thermoplastics, elastomers or composites. 

Abrasive-transfer modes, transition between, PTFE, 159 Abrasive wear... 

Kinetics of tumble/growth agglomeration (a) nucleation, (b) random coalescence, (c) abrasion transfer, and (d) crushing and layering. 

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