Effects of boron addition on the microstructure and properties of in situ synthesis TiC reinforced Cu Ti C composites

In situ TiC particles reinforced Cu matrix composites have been prepared by melt reaction method in this work. It is found that, during the preparation, not all the added graphite can react with soluble Ti to form TiC due to its poor wetting and very limited solubility in Cu melt, which will lead to...

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Bibliographic Details
Published in:Journal of alloys and compounds 2018-10, Vol.766, p.66-73
Main Authors: Ding, Haimin, Liu, Qing, Wang, Xianlong, Fan, Xiaoliang, Krzystyniak, Matthew, Glandut, Nicolas, Li, Chong
Format: Article
Language:English
Subjects:
Boron
Chemical Sciences
Composite materials
Copper
Electrical resistivity
Engineering Sciences
Graphite
Hardness testing
Heat conductivity
Material chemistry
Materials
Metal matrix composites
Microstructure
Particulate composites
Titanium carbide
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Summary:In situ TiC particles reinforced Cu matrix composites have been prepared by melt reaction method in this work. It is found that, during the preparation, not all the added graphite can react with soluble Ti to form TiC due to its poor wetting and very limited solubility in Cu melt, which will lead to residue of both graphite and Ti in the composites. Because the residual Ti will dissolve in the Cu matrix, it will seriously degrade the conductivity of the composites. In order to improve the electrical conductivity of Cu-Ti-C composites prepared by the melt reaction method, boron can be added to the composites to consume the residual Ti by the formation of TiB2. It is confirmed that the addition of B will make the distribution of the reinforced particles more homogeneous, most of all, can remarkably improve both the hardness and electrical conductivity of the Cu-Ti-C composites.
ISSN:0925-8388
1873-4669
DOI:10.1016/j.jallcom.2018.06.327