Experimental Investigation on Grinding-Induced Surface Damage of Fiber Reinforced Ceramic Matrix Composites

Abstract

The single factor experience of Fiber Reinforced Ceramic Matrix Composites (briefly named FCC) grinding was done on a NC optical curve grinding machine, and then the morphologie of the grinding surface was observed with an optical microscope. The effect of the grinding parameters, which include mainly grinding depth, abrasive grain size of diamond grinding wheel and grinding direction, on the grinding-induced surface damage of FCC was discussed, finally, the paper drew the conclusions that both increasing of grinding depth and increasing of abrasive grain sizes of diamond wheel can make the grinding-induced surface damage worse, and that different grinding directions also produce different effects on the grinding-induced surface damage.

Surface grinding of carbon fiber–reinforced plastic composites using rotary ultrasonic machining: Effects of tool variables

“…As a result, surface roughness was decreased using the tool with smaller abrasive size. 60 Effects of abrasive concentration. Figure 18 shows the effects of abrasive concentration on surface roughness.…”

“…For this reason, the two-slot tool led to a smaller surface roughness than that without slots. 50,59,60 Comparing with the two-slot tool, the four-slot tool had less abrasive grains taking part in grinding, resulting in the decrease in active cutting contact (time and area) and further leading to a larger R a value. 50 In addition, the decreasing rate of the number of grains was much larger, resulting in the increase in average MRR (MRR 1 ) and further the increase in tool wear, which led to the increase in surface roughness.…”

“…The results also agreed with those in other processes, such as grinding of CFRP, steel-ceramic composites, and ceramic matrix composites, and RUM of CFRP, Ti, ceramics, and so on. 7,50,[54][55][56][57][58][59][60] The possible reason for R a and its variation changes was that by equations (1) and (2), the increase in abrasive size (abrasive-grain diameter) caused the decrease in the number of active grains participating in machining on both the outside and end faces. And then it caused the decrease in the total cutting contact resulting in the increase in surface roughness.…”