Innovative approach to the development of conductive hybrid composites for Selective Laser Sintering

Lupone, Federico; Padovano, Elisa; Ostrovskaya, Oxana; Russo, Alessandro; Badini, Claudio Francesco

doi:10.1016/j.compositesa.2021.106429

Cited by 15 publications

(7 citation statements)

References 41 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Therefore, it is mainly used in aerospace [5], automotive parts [6], investment casting [7], biomedical engineering [8], and other industrial fields. However, the materials used in existing laser additive manufacturing technology are mostly metals [9], ceramics [10], polymers [11][12][13] and their composite powder materials [14][15][16], but rarely biomass composite powder materials. Luckily, biomass composite powder materials are characterized by low cost, low power consumption, low processing conditions, stable manufacturing performance and fabricating small deformation parts.…”

Section: Introductionmentioning

confidence: 99%

Simulation Analysis of Stress Field of Walnut Shell Composite Powder in Laser Additive Manufacturing Forming

Yu¹,

Ma²,

Wang³

et al. 2023

Journal of Renewable Materials

View full text Add to dashboard Cite

A calculation model of stress field in laser additive manufacturing of walnut shell composite powder (walnut shell/Co-PES powder) was established. The DFLUX subroutine was used to implement the moveable application of a double ellipsoid heat source by considering the mechanical properties varying with temperature. The stress field was simulated by the sequential coupling method, and the experimental results were in good accordance with the simulation results. In addition, the distribution and variation of stress and strain field were obtained in the process of laser additive manufacturing of walnut shell composite powder. The displacement of laser additive manufacturing walnut shell composite parts gradually decreased with increasing preheating temperature, decreasing laser power and increasing scanning speed. During the cooling process, the displacement of laser additive manufacturing of walnut shell composite parts gradually increased with the increasing preheating temperature, decreasing scanning speed and increasing laser power.

show abstract

Section: Introductionmentioning

confidence: 99%

Simulation Analysis of Stress Field of Walnut Shell Composite Powder in Laser Additive Manufacturing Forming

Yu¹,

Ma²,

Wang³

et al. 2023

Journal of Renewable Materials

View full text Add to dashboard Cite

show abstract

“…There are several articles about PBF of polymer composites with thermally and electrically conductive fillers (e.g., carbon-based fillers such as carbon fibres [ 27 ], graphite [ 28 ], CNT [ 29 ] and graphene [ 30 ], or metal fillers such as Cu [ 31 ] and Ag [ 32 ]). On the contrary, the literature on PBF with thermally conductive and electrically insulating polymer-based composites is sparse, and most studies use PA12 as the polymer matrix.…”

Section: Introductionmentioning

confidence: 99%

Thermal Conductivity and Mechanical Properties of Polymer Composites with Hexagonal Boron Nitride—A Comparison of Three Processing Methods: Injection Moulding, Powder Bed Fusion and Casting

et al. 2023

View full text Add to dashboard Cite

Materials providing heat dissipation and electrical insulation are required for many electronic and medical devices. Polymer composites with hexagonal boron nitride (hBN) may fulfil such requirements. The focus of this study is to compare composites with hBN fabricated by injection moulding (IM), powder bed fusion (PBF) and casting. The specimens were characterised by measuring thermal conductivity, tensile properties, hardness and hBN particle orientation. A thermoplastic polyurethane (TPU) was selected as the matrix for IM and PBF, and an epoxy was the matrix for casting. The maximum filler weight fractions were 65%, 55% and 40% for IM, casting and PBF, respectively. The highest thermal conductivity (2.1 W/m∙K) was measured for an IM specimen with 65 wt% hBN. However, cast specimens had the highest thermal conductivity for a given hBN fraction. The orientation of hBN platelets in the specimens was characterised by X-ray diffraction and compared with numerical simulations. The measured thermal conductivities were discussed by comparing them with four models from the literature (the effective medium approximation model, the Ordóñez-Miranda model, the Sun model, and the Lewis-Nielsen model). These models predicted quite different thermal conductivities vs. filler fraction. Adding hBN increased the hardness and tensile modulus, and the tensile strength at high hBN fractions. The strength had a minimum as the function of filler fraction, while the strain at break decreased. These trends can be explained by two mechanisms which occur when adding hBN: reinforcement and embrittlement.

show abstract

“…In the past, most of the research on polymeric thermally conductive composites with high mechanical properties was based on epoxy resin matrix, however, there was less research on thermoplastic systems [34][35][36][37][38][39][40][41] (such as PP, ABS, PC etc.) of thermally conductive composites.…”

Section: Introductionmentioning

confidence: 99%

Preparation of PP/SCF thermally conductive composites with forced‐assembled networks by multiple injection compression molding

Guo

Zhang

et al. 2022

J of Applied Polymer Sci

View full text Add to dashboard Cite

A multiple injection compression molding (ICM) method was proposed on the basis of injection molding and applied for the preparation of polypropylene/ short carbon fiber (PP/SCF) high thermally conductive composites in this article. During each injection compression cycle, the thickness of composite sample would be reduced effectively for better SCF orientation along the flow direction. Moreover, the original loose self-assembled SCF networks obtained from injection process can furtherly transfer into much compact ones under the effect of compression force. The performance differences among SCF/PP composites prepared with one-time injection molding (IM), multiple IM, and multiple ICM were also investigated. The SCF/PP composite sample prepared with multiple ICM method presented superior comprehensive performance, $100% and 28% enhancements in thermal conductivity and tensile strength compared with the one-time IM sample. We believe the multiple ICM method can provide a new idea for industrial production of functional polymer composites, especially for thermoplastic polymer composite.

show abstract

Innovative approach to the development of conductive hybrid composites for Selective Laser Sintering

Cited by 15 publications

References 41 publications

Simulation Analysis of Stress Field of Walnut Shell Composite Powder in Laser Additive Manufacturing Forming

Simulation Analysis of Stress Field of Walnut Shell Composite Powder in Laser Additive Manufacturing Forming

Thermal Conductivity and Mechanical Properties of Polymer Composites with Hexagonal Boron Nitride—A Comparison of Three Processing Methods: Injection Moulding, Powder Bed Fusion and Casting

Preparation of PP/SCF thermally conductive composites with forced‐assembled networks by multiple injection compression molding

Contact Info

Product

Resources

About