[T17] Composite/Hybrid Materials

[15P-T17-02] Heat Dissipation Enhancement in Cr-Cr Materials Synthesis through Spark Plasma Sintering

*Y.-G. Park^{1, 2}, B.-S. Park^{1, 2}, M.-H. Yang^{1, 2}, H.-K. Park¹ (1.Korea Institute of Industrial Technology, Korea, 2.Chonnam National University, Korea)

Keywords:Cu-Cr, spark plasma sintering, heat dissipation

To augment the mechanical properties of copper for its role in heat dissipation, spark plasma sintering was employed with different mass fractions of Cr. Fabricating Cu-Cr materials involved a process of horizontal ball milling. The milled powders underwent fabrication with distinct Cr contents, and the sintered bodies underwent consolidation through spark plasma sintering at 850°C, under an applied pressure of 40 MPa. The attained relative density exhibited a range from 96.33 to 99.20%. Corresponding to the escalating Cr content, the hardness manifested a proportional ascent from 48.2 to 64.7 kg/mm², concomitant with a decline in thermal conductivity from 415.3 to 336.6 W/mK. This behavior stems from the interference in heat transfer between particles as Cr atoms integrate into the Cu matrix. Furthermore, X-ray diffraction and scanning electron microscopy delved into the intricate phase analysis and morphological transformations within Cu-Cr materials, unveiling the changes induced by the different Cr content.