Microstructural development of a C/C-ZrC-Cu composite prepared by reactive melt infiltration with Zr/Cu powder mixture

Journal Article · Sun Apr 15 04:00:00 EDT 2018 · Materials Characterization

DOI:https://doi.org/10.1016/J.MATCHAR.2018.01.034· OSTI ID:22832963

Wu, Huang; Yi, Maozhong; Ge, Yicheng; Peng, Ke; Ran, Liping ^[1]

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1. State Key Laboratory of Powder Metallurgy, Central South University, Changsha 410083 (China)

Highlights: • The composite was prepared by reactive melt infiltration with Zr/Cu powder mixture. • Some ZrC particles coalesced into a continuous layer around the pyrolytic carbon. • Nano-sized inclusions of Cu–ZrC were formed inside some ZrC particles. • Cu–rich phase gathered at the interface between the ZrC layer and pyrolytic carbon. - Abstract: Zirconium carbide (ZrC) was introduced into porous carbon/carbon(C/C) preforms by reactive melt infiltration (RMI) using Zr/Cu powder mixture as the infiltrator. Characterization results revealed that ZrC particles were present in the infiltration matrix in two forms, some of which coalesced into a continuous layer around the pyrolytic carbon (PyC) while the others were dispersed within Cu phase which was distributed throughout the matrix. Nano-sized inclusions of Cu-ZrC were detected inside some ZrC particles. Furthermore, Cu-rich phase was observed at the interface between the continuous ZrC layer and PyC. The formation of Cu-ZrC mixture and Cu-rich phase was attributed to the trapping mechanism that some Zr-Cu-based liquid remained during the coalescence of ZrC particles or the formation of the continuous ZrC layer.

• OSTI ID: 22832963
• Journal Information: Materials Characterization, Journal Name: Materials Characterization Vol. 138; ISSN 1044-5803; ISSN MACHEX
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
COALESCENCE
COMPOSITE MATERIALS
COPPER
ELECTRON MICROSCOPY
INCLUSIONS
LAYERS
MICROSTRUCTURE
NANOPARTICLES
NANOSTRUCTURES
POROUS MATERIALS
PYROLYTIC CARBON
TRAPPING
ZIRCONIUM CARBIDES