The effect of surface roughness on the adhesion properties of ceramic / hybrid FRP adhesively bonded systems

Abstract

The adhesion properties of ceramic/hybrid fiber reinforced plastic (FRP) adhesively bonded systems were investigated with variations in the FRP surface roughness. The FRP substrate was subjected to mechanical abrasion in order to produce the surface roughness. The contact angles of water, formamide, and ethylene glycol on the FRP substrate were determined, and double lap shear and flexural tests were used to measure the joint strength of the ceramic/FRP adhesively bonded systems. In addition, the fracture surface of the adhesive layer at the adhesive/FRP interface was investigated by scanning electron microscopy (SEM). The wetting property of the adhesives was dependent on the amount of aramid microfibers induced on the FRP surface. The major source of the improvement in adhesion was attributed to changes in the stress distribution between the adhesive and the FRP substrate, due to fiber bridging. The high joint strength of the ceramic/FRP bonded systems resulted from cohesive failure in the fiber bulk and the larger volume of plastic deformation in the adhesive. In the flexural test, a drop in load occurred in three regions, and as the interfacial adhesion strength at the adhesive/FRP interface increased, the extent of the second load drop decreased with increasing load.

Characterization and Processing Behavior of Heated Aluminum-Polycarbonate Composite Build Plates for the FDM Additive Manufacturing Process

“…One of the first attributes detected when comparing polycarbonate to tempered glass and aluminum print beds is that the polycarbonate has a noticeably rougher surface, as can be seen in the optical microscopic images in Figure 5a; this will likely be very helpful in bonding with the deposited materials [40][41][42][43][44][45][46]. In order to objectively compare the surfaces, a PosiTector ® surface profile gauge was used to measure the mean surface roughness at 100 random points on the surface of the polycarbonate, as well as on the bare aluminum and tempered glass beds.…”

Experimental Investigation of Bond Characteristics between CFRP and Steel under Tensile Loads

“…All samples were cleaned with smooth cloth in order to get rid of dust particles. The methods followed for surface preparation were as follows (Park and Jang, 1998;Abdel-Jaber et al, 2007):  Surface thoroughly degreased to remove oils and other contamination;  Grot blasting performed to remove paint and surface corrosion;  Surface preparation using mechanical disk as shown in Figure 3.…”

Surface treatment of alumina ceramic for improved adhesion to a glass fibre-reinforced polyester composite

“…oils and greases) from the surface, maximise the degree of molecular contact between the surface and the adhesive, and to ensure that the intrinsic adhesion forces across the interface are sufficient to achieve adequate bond strength [8]. Methods to prepare ceramic surfaces for adhesive bonding include grit-blasting [9][10][11], abrasion [12], plasma [13][14][15], laser ablation [9,16], sol-gel [10,11] and silane treatment [17][18][19]. In some of these studies, the main focus was on the evaluation of the effect of the adhesive bondline between ceramic tiles and a metal backing plate.…”