Scholarlink

<p>This paper is an investigation of the mechanical behavior of fused deposition modeling (FDM) additives integrated and reinforced with boron nitride (BN) and graphite combined, in a single and integrated system with filament produced by a controlled twin-screw extrusion. The four material systems were neatly extruded into 1.75&#xa0;±&#xa0;0.05&#xa0;mm filaments in 4 systems (PLA, PLA + 3&#xa0;wt.% graphite, PLA + 3&#xa0;wt.% BN, and PLA + 3&#xa0;wt.% BN + 3&#xa0;wt.% graphite) and printed with the same FDM parameters (0.2&#xa0;mm layer height, 100 percent infill, and 0&#xa0;deg raster). The filler dispersion and filament morphology were uniformly confirmed by SEM and EDAX. The Shore D hardness of neat PLA was 51, and ultimate tensile strength (UTS) was 38&#xa0;MPa. Incorporation of 3&#xa0;wt.% of graphite gave 62 hardness (21.5%) and 45&#xa0;MPa UTS (36.8%), whilst 3 wt.% BN provided 66 hardness (29.4%) and 52&#xa0;MPa UTS (36.8%). The highest hardness (69, 35.3%) and UTS (60&#xa0;MPa, 57.9%) were of the hybrid BN-graphite composite. A shift between the fracture that was brittle in plain PLA and the tortuous crack-defended and cohesive fracture in the hybrid was observed using fractography and an affirmation of synergistic reinforcement and enhanced load-transfer effectiveness.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Mechanical and Fracture Characteristics of BN–Graphite Reinforced PLA Processed by Twin-Screw Extrusion and FDM

  • 期刊论文

  • 发表日期：

    2026年5月21日

查看全文
  • Mallikarjuna Kallahalli,
  • Kori Nagaraj,
  • V. Balaraj,
  • Vaddin Chetan

摘要

This paper is an investigation of the mechanical behavior of fused deposition modeling (FDM) additives integrated and reinforced with boron nitride (BN) and graphite combined, in a single and integrated system with filament produced by a controlled twin-screw extrusion. The four material systems were neatly extruded into 1.75 ± 0.05 mm filaments in 4 systems (PLA, PLA + 3 wt.% graphite, PLA + 3 wt.% BN, and PLA + 3 wt.% BN + 3 wt.% graphite) and printed with the same FDM parameters (0.2 mm layer height, 100 percent infill, and 0 deg raster). The filler dispersion and filament morphology were uniformly confirmed by SEM and EDAX. The Shore D hardness of neat PLA was 51, and ultimate tensile strength (UTS) was 38 MPa. Incorporation of 3 wt.% of graphite gave 62 hardness (21.5%) and 45 MPa UTS (36.8%), whilst 3 wt.% BN provided 66 hardness (29.4%) and 52 MPa UTS (36.8%). The highest hardness (69, 35.3%) and UTS (60 MPa, 57.9%) were of the hybrid BN-graphite composite. A shift between the fracture that was brittle in plain PLA and the tortuous crack-defended and cohesive fracture in the hybrid was observed using fractography and an affirmation of synergistic reinforcement and enhanced load-transfer effectiveness.