Synthesis Of SiC/Cu Composite Powders From Polycarbosilane And Cupric Nitrate Trihydrate

• Main Authors: Bang S.-R., Yim D.-M., Riu D.-H., Oh S.-T.
• Format: Article
• Language: English
• Published: Polish Academy of Sciences 2015-06-01
• Series: Archives of Metallurgy and Materials
• Subjects: Cu/SiC composite powders; Polycarbosilane; Cu-nitrate; Microstructure
• Online Access: http://www.degruyter.com/view/j/amm.2015.60.issue-2/amm-2015-0110/amm-2015-0110.xml?format=INT

SiC/Cu composite powders with the barrier coating of SiC-Al onto SiC powders were synthesized from Al-containing polycarbosilane precursor and Cu-nitrate hydrate. Curing at 200°C and high temperature pyrolysis at 1600°C was used to achieve the crystallization of precursor, forming the SiC-Al coating on the surface of SiC powders. A core-shell structure with the core of SiC and the shell of Cu was constructed by calcination and hydrogen-reduction of Cu nitrate hydrate. XRD and SEM analysis revealed that the β-SiC and 4H-SiC phases were formed on the surface of the initial α-SiC powders. Also, it was observed by EDX mapping that core powders of SiC were homogeneously surrounded with the fine Cu particles on their surface.