Scholarlink

<p>Complex-shaped components such as heat sinks are generally fabricated using extrusion, machining, or additive manufacturing; however, these methods are either energy-intensive, limited in handling ceramic-reinforced nanocomposites, or economically unviable. In this work, a cost-effective hybrid casting route has been developed to fabricate heat-sink-shaped AA2024-MWCNT (multiwall carbon nanotube) nanocomposites. The process integrates 3D printing-assisted investment casting for mold preparation with ultrasonication-assisted stir casting for uniform nanoparticle dispersion. PLA (poly-lactic acid)-based heat-sink patterns were 3D-printed, removed by thermal burnout, and used as sacrificial patterns for investment casting molds. Nanocomposites with varying MWCNT contents (0, 0.5, 0.75, 1, and 1.5&#xa0;wt.%) were fabricated. The existence of MWCNT within the nanocomposite was confirmed by X-ray diffraction peaks. The mechanical testing indicated that 0.75&#xa0;wt.% MWCNT nanocomposite had the best performance, with 285&#xa0;MPa tensile strength, 101 HV hardness, 11% (465 MPa) compressive strength, and 15% (533&#xa0;MPa) flexural strength improvement over unreinforced AA2024. The suggested approach allows the production of complex geometries at lower cost and higher productivity, hence ideal for use in the field of lightweight, complex-shaped materials, especially in automotive and aerospace industries.</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

Development of a Hybrid 3D Printing and Ultrasonication-Assisted Casting Route for AA2024-MWCNT Nanocomposite Heat Sinks

  • 期刊论文

  • 发表日期：

    2026年2月11日

查看全文
  • S. C. Amith,
  • Mugilvalavan Mohan,
  • R. Praveen,
  • Arunkumar Thirugnanasambandam

摘要

Complex-shaped components such as heat sinks are generally fabricated using extrusion, machining, or additive manufacturing; however, these methods are either energy-intensive, limited in handling ceramic-reinforced nanocomposites, or economically unviable. In this work, a cost-effective hybrid casting route has been developed to fabricate heat-sink-shaped AA2024-MWCNT (multiwall carbon nanotube) nanocomposites. The process integrates 3D printing-assisted investment casting for mold preparation with ultrasonication-assisted stir casting for uniform nanoparticle dispersion. PLA (poly-lactic acid)-based heat-sink patterns were 3D-printed, removed by thermal burnout, and used as sacrificial patterns for investment casting molds. Nanocomposites with varying MWCNT contents (0, 0.5, 0.75, 1, and 1.5 wt.%) were fabricated. The existence of MWCNT within the nanocomposite was confirmed by X-ray diffraction peaks. The mechanical testing indicated that 0.75 wt.% MWCNT nanocomposite had the best performance, with 285 MPa tensile strength, 101 HV hardness, 11% (465 MPa) compressive strength, and 15% (533 MPa) flexural strength improvement over unreinforced AA2024. The suggested approach allows the production of complex geometries at lower cost and higher productivity, hence ideal for use in the field of lightweight, complex-shaped materials, especially in automotive and aerospace industries.