Microstructure and properties of Cu-Ti alloy infiltrated chopped Cf reinforced ceramics composites
Date Issued
2017-10-14
Abstract
Novel friction composites (C/C-Cu5Si-TiC) were prepared via reactive melt infiltration (RMI) of Cu-Ti alloy into porous C/C-SiC composites. The microstructure, physical properties and tribological behaviors of the novel material were studied. Results were compared to conventional C/C-SiC composites produced by liquid silicon infiltration(LSI). The resultant composite showed the microstructure composed of Cu5Si matrix reinforced with TiC particles and intact C/C structures. Most importantly, the composite did not present traces of free Si. As a result, the C/C-Cu5Si-TiC composite showed higher flexural strength, impact toughness and thermal diffusivity in comparison to C/C-SiC composites. Tribological properties were measured using 30CrSiMoVA as a counterpart. In general, the C/C-Cu5Si-TiC composites showed lower coefficient of friction(COF), but higher wear resistance and frictional stability. The improved wear resistance of the C/C-Cu5Si-TiC composites is credited to the formation of friction films from Cu5Si matrix. Other deformation and wear mechanisms are also described
considering the microstructural observations.
considering the microstructural observations.
Subjects
Chopped fibers architecture
;
Microstructure
;
Tribological property
;
Cu-Ti alloy
;
Reactive melt infiltratio
Publisher
Elsevier {BV}
Institution
Type
journal article
Journal/Edited collection
Band
43
Issue
18
Start page
16628
End page
16637
Page number
10
Secondary publication
Yes
Document version
Postprint
Language
English
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