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As a simplified manufacturing process for the production of carbon nanotube copper matrix composites, a novel innovational self-reduction molecular-level mixing method was suggested. During the manufacture of CNT/Cu mixing powder, the surface structure and elemental distribution were investigated. The CNT/Cu could be produced by a high temperature reaction under vacuum at 900 degrees under vacuum, according to the carbon nanotubes' carbon atoms on the surface, reducing the divalent copper on the surface to zero-valent copper monomers. Following a self-reduction reaction, a decrease in the ratio of D and G peaks on the Raman spectra indicated that the defective areas on the carbon nanotubes were wrapped and covered by the copper atoms. The pre-mixed CNT/Cu powders were uniformly embedded in the copper matrix materials' grain boundaries and effectively stopped the tensile fracture.
Source link: https://europepmc.org/article/MED/36143806
U00b0C: Carbon fiber powder and titanium powder are mixed, pressed, and sintered at a high temperature of 1300-1500 °C. Composite composites made of carbon fiber-reinforced titanium matrix composites were tested for morphology and conductivity. When the temperature range of the Ti-CF composites was first reduced and then raised, the porosity and resistance first decreased and then increased.
Source link: https://europepmc.org/article/MED/36061713
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