The lack of robust interphases between carbon and most metals prevent the exploration of the full scope potential of carbon-based metal matrix composites. Here, we demonstrated a scalable and straightforward way to produce strong interphase between copper (Cu) and carbon fibers (CFs) by designing a tailored titanium oxide-carbide coating (TiO y-TiC x) on CFs in a molten salt process. The oxide-carbide composition in the graded layer strongly depends on the coating temperature (800-950 ºC). A coating with a high TiO y content obtained at a low coating temperature (800 ºC) contributes to better molten-Cu wetting and strong adhesion energy between CFs and Cu during a subsequent exposure at 1200 ºC. The Cu wetting angle for the TiO y-TiC x-CF sample obtained at 800 ºC was ~80º ± 5º with a Cu surface coverage of ~50% versus ~115º and ~10% for the TiC x-CF sample made at 950 ºC. The kinetic analysis of the coating process step by step suggests a growth rate limited by the mass-transfer through the coated layer. This method provides a novel approach to improve the thermal conductivity of Cu/C composite for thermal management applications.

In this work, laser sintering (LS) of cold-pressed copper (Cu) powder without using a binder was demonstrated. To promote the densification of the final layers, the Cu powder was cold pressed, thereby forming a densely packed powder bed for the laser sintering. This densification and microstructural evolution study shows that the cold-pressed powder led to an increase of up to 10% in the relative density and a decrease of 10 times in the surface roughness.The influence of the scan speed on the densification and sintering quality was studied. A relatively slow scan speed, 25 µm/s, allowed sufficient atomic diffusion during the laser sintering process and produced dense Cu layers without cracks and open pores. The introduction of the cold-pressing step into the LS process is critical for achieving high-density powder metallurgy parts without using binders.

(Table II) were not much different. The highest and lowest average fastness values of coating silver by different processes were the spray processes and the brush processes, respectively. Thus, the optimized coating processes of the electroless silver plating were the spray processes by adding the Tollen reagent and then the Dglucose to promote the adhesive values between the surfaces and silver element for the human beings health and the environment safety.