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Microtribological/mechanical testing in 0, 1 and 2 dimensions: A comparative study on different materials by Kirsten Ingolf Schiffmann is a Engineering article available to read on EtoBox.

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Nanomechanical testing can be classified by dimensions of lateral movement of the tip: starting with nanoindentation (0D), followed by scratching and linear oscillating wear (1D) and finally scanning/area wear (2D). In this paper a comparison of theses four techniques is made for three types of materials: AF45 glass (amorphous), silicon (hard, crystalline) and aluminium (soft, crystalline). The morphology of craters, the wear depth and the pile-up characteristic of all types of testing is evaluated as a function of load. While 0D-and 1D testing often result in linear dependence of wear depth as a function of load, 2D testing shows different behaviour: at low loads a low or zero wear rate is found while above a certain threshold wear increases significantly. The analysis of pile-up created at the crater edges shows that the transport of piled-up material out of the crater seems to be the dominant factor for this effect. While below a threshold pile-up is redistributed within the crater (ploughing wear), above the threshold it is moved out of the crater and deposited outside of the scanned area (cutting wear). A critical attack angle is believed to be the decisive factor for the chan

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Author

Kirsten Ingolf Schiffmann

Publisher

Elsevier Science; Elsevier ; Elsevier BV (ISSN 0043-1648)

Published

2008

Language

EN

Field

Engineering (Physical Sciences)