Experimental study of hot pressed sintered modified materials

Abstract

The PTFE/Cu composite powder was selected as the experimental raw material, and the modified material PTFE/Cu with dense structure was prepared by hot pressing sintering process. The morphology of the product before and after the test was compared and observed by SEM. The effect of different material ratios on the densification results of the powder was studied, and the difference between molding and hot pressing sintering was analyzed. The results show that hot-pressed sintering can produce modified PTFE/Cu with a density of up to 99.9%, which is higher than that obtained by molding under the same pressure. The SEM image shows that, unlike the molding, hot-pressing sintering makes the crystal grains of the two materials exist independently in the modified polymer, and makes the powder crystal grains gradually perpendicular to the hot pressing direction.

Computer Simulation of Composite Materials Behavior under Pressing

“…Therefore, the methods of processing compositions based on PTFE into a composite are based on a two-stage process: obtaining a blank by pressing and subsequent heat treatment of the workpiece [ 15 ]. A special place in this plan belongs to the technology of pressing the composition into the workpiece, as the main operation of shaping the workpiece and structuring the composite [ 16 , 17 ]. In the process of further sintering of pressed materials at the fusion stage of matrix particles and fillers, the finished product’s chemical, physical, mechanical, and operational properties are established [ 18 , 19 , 20 , 21 ].…”