Journal
CERAMICS INTERNATIONAL
Volume 48, Issue 21, Pages 32556-32560Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.ceramint.2022.07.322
Keywords
Tantalum; Carbide; Metal matrix composites; Spark plasma sintering; Melting
Categories
Funding
- Ministry of Science and Higher Education of the Russian Federation [121032500062-4, 1021101115342-6]
Ask authors/readers for more resources
Nearly fully dense metal-ceramic composites were synthesized using high-energy ball milling and liquid phase-assisted spark plasma sintering. The composites exhibited low residual porosity and interesting structural features with a Cu-rich network. The composition of the starting mixtures influenced the reinforcing phase composition and the Vickers hardness of the sintered composites.
Nearly fully dense metal-ceramic composites were synthesized by high-energy ball milling of (2Ta-C)+Cu powder mixtures followed by liquid phase-assisted spark plasma sintering (SPS). The concentration of copper in the starting mixtures was 30 wt% and 50 wt%, while the molar ratio of Ta/C was 2/1. The products of milling consisted of dense composite agglomerates. The agglomerates formed from (2Ta-C)+30 wt% Cu contained similar to 10 wt% of iron introduced as contamination during milling. In the sintered composite obtained from (2Ta-C)+30 wt % Cu, Fe5Ta3 was present along with TaC and Ta2C. The reinforcing phase in the composite obtained from (2Ta-C)+50 wt% Cu was Ta2C. During SPS, the formation of melt locally at the inter-particle contacts enabled consolidation of the agglomerates into compacts with a low residual porosity (2-5%). Composites obtained in this work possessed interesting structural features: a Cu-rich network penetrated the structure such that each composite particle was surrounded by a Cu-rich layer. The Vickers hardness of the sintered composites obtained from mixtures containing 50 wt% Cu and 30 wt% Cu was 490 +/- 50 HV1 and 715 +/- 55 HV1, respectively.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available