Fabrication of Core-Shell Chopped Cf-Phenolic Resin Composite Powder for Laser Additive Manufacturing of Cf/SiC Composites

Abstract
Laser additive manufacturing is a promising technique for the preparation of complex-shaped SiC composites. High-quality powders are critical for high-precision laser printing. In this work, core-shell Cf @phenolic resin (PR) composites for selective laser sintering of carbon fiber reinforced silicon carbide (Cf/SiC) composites were fabricated by surface modification using 3-aminopropyltriethoxy silane coupling agent (KH550) in combination with planetary ball milling. PR coated uniformly on the fiber surface to form a core-shell structure. The effects of PR on the morphology, elemental composition, interfacial interactions, and laser absorption of the core-shell composite powder were investigated in detail. Results indicated that the composite powder exhibited good laser absorption within the infrared band.
Funding Information
  • National Natural Science Foundation of China (No. 52073299, 91960102, 51602325)
  • Youth Innovation Promotion Association (CAS, No. 2018289)
  • Natural Science Foundation of Shanghai (20ZR1465400)
  • Science Foundation for Opening Project of State Key Laboratory of High-Performance Ceramics and Superfine Microstructures, Shanghai Institute of Ceramics CAS (SKL201902SIC)