Protection of carbon fiber surfaces with silicon-based ceramic coating

Abstract

Production and utilization of carbon fibers (CFs) and CF reinforced plastic composites have been greatly widespread because of their distinguished properties. Although recycling of post-consumer CFs is required, recycled CFs often suffer from surface defects which diminish their quality. This article presents a process that create ceramic thin layers on the CF surfaces. CFs covered with ¡-Si 3 N 4 and ¢-SiC layers were prepared readily and they were characterized by significantly improved oxidation resistivity. The method would be available to recuperate properties of the recycled CFs and might convert the post-consumer CFs into value-added products.

A feasibility study on direct measurements of interaction forces between carbon fiber surfaces and other substances

“…CF surface modification methods endorse the fiber/matrix interfacial strength, but sometimes are accompanied by the loss in single fiber strength owing to the generation of surface defects. [4,30] In other words, affinity at the fiber/matrix interface and the fiber strength are often in the relationship of trade-off. Recently, mechanical properties of single CF filaments have been evaluated.…”