Abstract
Polymer-composite materials have the characteristics of light weight, high load, corrosion resistance, heat resistance, and high oil resistance. In particular, graphene composite has better electrical conductivity and mechanical performance. However, the raw materials of graphene composite are processed into semi-finished products, directly affecting their performance and service life. The electromagnetic pulse compaction was initially studied to get the product Graphene/PEKK composite powder. Simultaneously, spark plasma sintering was used to get the bars to determine the electrical conductivity of Graphene/PEKK composite. On the basis of this result, conducting Graphene/PEKK composite powder can be processed by electromagnetic pulse compaction. Finite element numerical analysis was used to obtain process parameters during the electromagnetic pulse compaction. The results show that discharge voltage and discharge capacitance influence on the magnetic force, which is a main moulding factor affecting stress, strain and density distribution on the specimen during electromagnetic pulse compaction in a few microseconds.
Highlights
With the rapid development of automobile, aviation, aerospace, and rail transit, lightweight materials have become a relatively important topic as an effective measure to pursue global energy conservation and environmental protection [1,2,3]
Polymer composite materials have the characteristics of light weight, high strength, corrosion resistance, fatigue resistance, and strong designability
Powders of different materials such as intermetallics, refractory alloys, ceramics, nanomaterials, and composites can be fabricated into full-density parts by using dynamic magnetic consolidation (DMC)
Summary
With the rapid development of automobile, aviation, aerospace, and rail transit, lightweight materials have become a relatively important topic as an effective measure to pursue global energy conservation and environmental protection [1,2,3]. Powders of different materials such as intermetallics, refractory alloys, ceramics, nanomaterials, and composites can be fabricated into full-density parts by using dynamic magnetic consolidation (DMC) This high densification benefits the decrease in sintering temperatures, increase in strength, and improvement in microstructures with fine grain size [36]. A process plan suitable for the powder moulding of self-prepared conductive Graphene/PEKK composite materials is necessary to select, and the corresponding moulding process parameters need to be determined. Cold moulding-electromagnetic pulse compaction technology was primarily proposed to realize the moulding process of self-prepared Graphene/PEKK polymer powder at room temperature. Hene content had strong electrical conductivity by using the SPS moulding bar; Figure 6a shows the micromorphology of selfprepared pure PEEK powder, and Figure 6b shows the micromorphology of the self-prepared Graphene/PEKK composite bar. IncreEalseecdtrtoemmapgenreattiucrpeurlesdeupcreodcethsseinexgteeqrnuaipl fmorecnet, iist aalnsoewretdeucchendoltohgeymeeqcuhiapnmiceanltpwrohpicehrutiseessoeflethcterommaategrniaelt.icThenereerfgoyret,obparlaoncecsinsgmtehtealmmouatledriinaglsparnedssuisreapapnldicmaboluelidninthgetefimelpderoafstpuerceiawl apsrotcheesskienyg ttoecmhnooullodgyp.oIltyims eesrpceocmialplyossiuteitsa.bOlenfothreprboacseisssoinfgthneona-bfoervreouressmeaartcehr,iawlse, shuacvhearseaaslounmtionibuemlie, vmeatghnatesthiuemp,roadnudcctoopfpceorn. dIut cctainngwGerldapahllenkein/PdEsKoKf hcoommopgoesinteeocuasnobre cussed
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