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Aiming at the use of glass fiber reinforced poly‐ether‐ether‐ketone (GF/PEEK) with low laser absorbance in laser assisted tape winding/placement (LATW/LATP), a method for dyeing GF/PEEK prepreg with nanoparticle fillers (NFs) is presented. First, the effects of carbon black (CB) and graphite (G) NFs on composites laser absorbance and reflection pattern were quantified, and the complex refractive index...
Low thermal conductivity and leakage after melting are the two main issues limited the application of phase change materials (PCMs). Here, to improve the thermal conductivity and hamper the leakage after melting, PCMs were fabricated by infiltrating paraffin into h-BN porous scaffolds with continuous thermal conductive paths. The latent heat of fusion of the resultant PCMs containing 18wt% h-BN was...
Synchrotron radiation x-ray imaging technique was applied for in-situ observation of interfacial bubbles in Cu/molten Sn-3.5Ag/Cu joint undergoing thermomigration. The heating plate temperature was maintained at 350 °C and reflow time of 1 h was considered. Interfacial bubbles at hot side, favoured by wetting transition for growth, increase the effective thermal gradient in the solder medium. The...
Synchrotron radiation real-time imaging technology was conducted to in situ investigate the thermomigration and solidification behavior of Cu/Sn-58Bi/Cu solder joint during reflow under temperature gradient. The high concentration of Bi in solder retarded the thermomigration of Cu atoms and the interfacial reaction of the solder joint. Both the growth of the interfacial intermetallic compounds (IMCs)...
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