Analytical model of particle interference effects in divergent erosive jets

A level set methodology for predicting the surface evolution of inclined masked micro-channels resulting from abrasive jet micro-machining at oblique incidence

“…The average abrasive particle mass flow rate was measured before and after each channel was machined, by weighing with a micro-mass balance (accuracy¼0.01 mg) the amount of powder blasted for a minute into a special container that was covered with filter material which prevented the particles escaping, while also preventing back pressure. The measured mass flow rate range of 1.4-2.7 g min À 1 was low enough to ensure that particles rebounding from the surface did not interfere with incoming particles [20,21].…”

Solid particle erosion mechanisms of protective coatings for aerospace applications

“…As has been reported by several authors [167,169,174,180], particle interaction during erosion testing can significantly affect the measured rates. In order to optimize the SPE methodology and ensure the acquisition of good quality data, we evaluated the effect of WD and f r on the SPE measurements.…”

“…They found that the particle flux (feed rate per surface area) is a determining factor in predicting particle interference effects. In a more recent series of articles, combining experimental and modeling results, Papini, Spelt and coworkers [167,170,174,176,178,180] showed for normal incidence SPE that the erosion rates decrease for increasing WD because of an increased inter-particle collision probability when the volume between the nozzle outlet and the surface increases. Therefore, in order to optimize the testing methodology of our erosion test rig using the long aspect ratio nozzle, we present in Chapter 5 a study on the effects of feed rate and WD on the SPE of brittle bulk materials and show that particle interference effects can reduce erosion rates by as much as 40 %.…”

“…In the past 15 years, much work on the influence of process parameters on the shape of erosion scars has been done in the context of abrasion jet micromachining of glass for flat panel displays [69,71,167,[170][171][172][173][174][175][176][177][178][179][180][181]. In particular, the work of Papini, Spelt and coworkers [167,170,[174][175][176][177][178][179][180][181] has led to many interesting findings on the importance of working parameters such as feed rate and WD on the erosion process. As we will discuss in the next sections, the Gaussian profile of the wear scar has enabled us to measure the volume loss of eroded samples using a simple profilometry methodology and other results regarding particle interference effects have helped us to optimize our erosion testing methodology.…”

Effect of Solid Particle Erosion on the Aqueous Corrosion Behaviour of a Ti6Al4V Sheet

“…Other researchers have also extensively investigated the particle velocity effect on the solid particle erosion behavior of materials [32,[36][37][38][39][40][41][42][43][44][45][46][47][48]. Figure 2(a) shows erosion rates of samples as a function of particle pressure at 30°, 60° and 90° impingement angles.…”