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Fabrication and characterization of functionally graded synthetic graphite/phenolic nanocomposites

机译:功能梯度合成石墨/酚醛纳米复合材料的制备与表征

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Stepwise functionally graded synthetic graphite/phenolic nanocomposites (FGNs) were fabricated using combined powder stacking and compression molding techniques. The process allowed the fabrication of FGNs with four different microstructure gradient patterns of the same geometry and graphite content, as well as non-graded nanocomposites (NGNs). The FGN with the highest graphite content layer on the top and bottom surfaces and the lowest in the center, showed the highest improvement of 97% in thermo-mechanical properties and the best creep recovery of 34.7% among all FGNs and NGN. Introducing graphite by 20 wt% increased thermal conductivity of phenolic from 0.35 to 0.88 W/(m℃) and decreased its electrical resistivity to 20.812/cm. It was found that the electrical and thermal properties of nanocomposites could be manipulated by changing the gradient patterns.
机译:使用组合的粉末堆积和压缩成型技术制造功能逐步分级的合成石墨/酚醛纳米复合材料(FGN)。该工艺允许制造具有相同几何形状和石墨含量的四个不同微观结构梯度图案的FGN,以及非梯度纳米复合材料(NGN)。在顶部和底部表面上具有最高石墨含量层的FGN,在中心处最低的FGN,在所有FGN和NGN中表现出最高的热机械性能改进97%和最佳的蠕变回复率34.7%。引入20 wt%的石墨可以使酚醛树脂的热导率从0.35提高到0.88 W /(m℃),并将其电阻率降低到20.812 / cm。发现可以通过改变梯度图案来控制纳米复合材料的电学和热学性质。

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