Abstract: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 behaviour of AlN ceramics was investigated using SiC and SiO 2 particles as erodents, at following impact angles: 30 8, 458, 60 8, 758 and 90 8. Scanning electron microscopy … Show more
“…After solid particle erosion, materials roughness undergoes a significant change by abrasive particles hitting on the surface. Moreover, surface morphology (topography and roughness) plays, or could play an important role in surface analysis after erosion by particles . Defining the effect of impingiment angle on roughness after solid particle erosion gives valuable informations about target material surface resistance to wear.…”
In current study, the tested material is a glass fiber reinforced polyester matrix composite with one stacking sequence namely [0/90] s . First of all, the solid particle erosion behavior of composite samples was investigated under various impingement angles (15 , 30 , 45 , 60 , 75 , and 90 , respectively). Eroded composite samples were examined by non-contact optical profilometer and 3D surface roughness maps were obtained. From optical profilometer results, it was clearly shown that values of erosion crater hole volumes were well suited with erosion rate values versus impingement angles. Maximum and minimum erosion crater hole volumes observed at 60 and 15 impingement angles due to semi-ductile characteristic of the target material, respectively. After erosion tests, the scratch behavior of composite samples was examined. The results showed that the coefficient of friction was decreased by the increase in impingement angles of 45 and 60 . The maximum scratch hardness value was determined at 60 impingement angle. Scratch damage morphologies were determined by using optical microscope and scanning electron microscope. It was observed that low (15 and 30 ) and high (75 and 90 ) impingement angles result in remarkably severe surface deformation on the samples.
“…After solid particle erosion, materials roughness undergoes a significant change by abrasive particles hitting on the surface. Moreover, surface morphology (topography and roughness) plays, or could play an important role in surface analysis after erosion by particles . Defining the effect of impingiment angle on roughness after solid particle erosion gives valuable informations about target material surface resistance to wear.…”
In current study, the tested material is a glass fiber reinforced polyester matrix composite with one stacking sequence namely [0/90] s . First of all, the solid particle erosion behavior of composite samples was investigated under various impingement angles (15 , 30 , 45 , 60 , 75 , and 90 , respectively). Eroded composite samples were examined by non-contact optical profilometer and 3D surface roughness maps were obtained. From optical profilometer results, it was clearly shown that values of erosion crater hole volumes were well suited with erosion rate values versus impingement angles. Maximum and minimum erosion crater hole volumes observed at 60 and 15 impingement angles due to semi-ductile characteristic of the target material, respectively. After erosion tests, the scratch behavior of composite samples was examined. The results showed that the coefficient of friction was decreased by the increase in impingement angles of 45 and 60 . The maximum scratch hardness value was determined at 60 impingement angle. Scratch damage morphologies were determined by using optical microscope and scanning electron microscope. It was observed that low (15 and 30 ) and high (75 and 90 ) impingement angles result in remarkably severe surface deformation on the samples.
“…The erosion test was carried out using an erosion testing apparatus (Figure 1(A,B)) [4,17], where samples were subjected to erosive wear of dry silicon oxide (SiO 2 ) and silicon carbide (SiC) particles as erodent in air. The erodent impact angles were 30°, 60° and 90°.…”
Section: Methodsmentioning
confidence: 99%
“…The SiO 2 particles were smooth, softer, more rounded while the SiC particles were sharp and angular (Figure 1(C,D)). Figure 1 (A) Sample holder in erosion test equipment, (B) scheme of sand equipment for erosion testing, SEM micrograph of erodent (C) SiO 2 and (D) SiC particles [4, 17]. …”
Section: Methodsmentioning
confidence: 99%
“…(A) Sample holder in erosion test equipment, (B) scheme of sand equipment for erosion testing, SEM micrograph of erodent (C) SiO 2 and (D) SiC particles [4, 17]. …”
Section: Methodsmentioning
confidence: 99%
“…Alumina, also known as aluminium oxide (Al 2 O 3 ), is a highly significant ceramic material with a wide range of technological applications [1][2][3][4]. It is considered as one of the most commonly utilised advanced ceramics due to its exceptional properties, such as high hardness, chemical inertness, wear resistance and a high melting point.…”
The volume erosion rate of the slip cast monolithic and composite ceramics was studied using SiO 2 and SiC particles as erodents, under different impact angles (30°, 60°, 90°), at room temperature. Therefore, three groups of samples were prepared: (i) monolithic alumina (Al 2 O 3 ); (ii) composite alumina-zirconia (Al 2 O 3 -ZrO 2 ) containing 99 wt-% Al 2 O 3 and 1 wt-% ZrO 2 and (iii) composite alumina-zirconia (Al 2 O 3 -ZrO 2 ) containing 90 wt-% Al 2 O 3 and 10 wt-% ZrO 2 . Erosion mechanisms of all prepared ceramic samples were evaluated by the volume erosion rate (v, mm 3 •g -1 ). Obtained results were compared with the analytical Wiederhorn and Evans equations. The mechanical properties (hardness and fracture toughness) of prepared ceramic samples were compared with their v under the above-mentioned conditions. It was found that the erosion of monolithic and composite ceramics increased with the increase of the impact angle. Volume erosion rate was highest at an impact angle of 90°and amounts to 115 mm 3 •g -1 with SiC, and 12 mm 3 •g -1 with SiO 2 erodent particles for monolithic alumina ceramics, 77 mm 3 •g -1 with SiC, and 8 mm 3 •g -1 with SiO 2 erodent particles for ceramics with the addition of 1 wt-% of ZrO 2 , and 61 mm 3 •g -1 with SiC, and 7 mm 3 •g -1 with SiO 2 erodent particles for ceramics with the addition of 10 wt-% of ZrO 2 . Therefore, it can be concluded that the erosion resistance of monolithic Al 2 O 3 increases with the increasing amount of ZrO 2 in the composite Al 2 O 3 -ZrO 2 ceramics, thus erosion resistance can be improved with the addition of ZrO 2 .
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