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When particles of grit, oxide or other contaminants get entrained in high speed gas or steam sections of power or aero turbines they can damage components through repeated impact of particles with the surface. This erosion in turn produces additional debris which can damage other surfaces further down-stream. An instrument to evaluate and quantify high temperature solid particulate erosion (HTSPE)...
Pin on disc wear tests on steel and alumina discs have been carried out using the NPL designed system which enables in situ monitoring of the wear and surface condition through the use of a line-scan camera microscope. In addition, the combination of a Linear Voltage Displacement Transformer (LVDT) and a non-contact optical aberration probe make it possible to monitor the wear of the disc and of the...
WC/Co hardmetals are used in many applications where wear resistance is important. However, despite recent work, the microstructural basis of wear is not completely understood.This paper describes the results of in situ scratch experiments carried out with a NPL designed and manufactured microtribometer in which spherically ended diamond indenters were moved under load across polished WC/Co samples...
The effect of surface roughness and topographical orientation on friction and wear has been investigated for diamond like carbon (DLC) coated and uncoated steel surfaces with three levels of surface roughness in the range of 0.004–0.11μm Ra value and with topographical orientations at 0°, 45° and 90° angles from grinding marks. In this first part we report the experimental observations that form the...
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