Naslov
Erosion mechanisms of aluminium nitride ceramics at different impact angles

Autori
Grilec, Krešimir ; Ćurković, Lidija ; Kumić, Ivan ; Baršić, Gorana

Izvornik
Materialwissenschaft und Werkstofftechnik (0933-5137) 42 (2011), 8; 712-717

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
solid particle erosion; erosion mechanisms; AlN ceramics

Sažetak
In this paper, erosion wear behaviour of aluminium nitride (AlN) ceramics is studied. The influence of particle hardness and shape on erosion of the AlN surface is examined. The effect of varying the impingement angle on the weight loss and the roughness parameters of AlN ceramics testing sample is also determined. Therefore, erosive wear behavior of AlN ceramics was investigated using SiC and SiO2 particles as erodents, at following impact angles: 30°, 45°, 60°, 75° and 90°. Scanning electron microscopy (SEM) was used to analyze the eroded surfaces in order to determine erosion mechanisms. The roughness parameters (Ra, Rz and Rmax), before and after erosion with SiO2 and SiC particles at 30° and 90° angles of impingement, respectively, were determined using a profilometer. It was found that the impact angle is influencing the erosion wear of the AlN ceramics and maximum erosion takes place at impact angle of 90°. The results indicate that hard, angular SiC particles cause more damage than softer, more rounded SiO2 particles.

Izvorni jezik
Engleski

Znanstvena područja
Strojarstvo, Temeljne tehničke znanosti

POVEZANOST RADA