Microstructures and Mechanical Behavior of Ti{sub 3}SiC{sub 2}/Al{sub 2}O{sub 3}-Ni Composites Synthesized by Pulse Discharge Sintering

Journal Article · Sun Jul 15 04:00:00 EDT 2018 · Journal of Materials Engineering and Performance

DOI:https://doi.org/10.1007/S11665-018-3452-1· OSTI ID:22860382

Pourali, Zeinab ^[1]; Yaftian, Mohammad Reza ^[1]; Amiri, Zeinab ^[2]; Emami, Seyyed Mohsen; Eslami Shahed, Hosein ^[3]

---

1. University of Zanjan, Phase Equilibria Research Laboratory, Department of Chemistry, Faculty of Science (Iran, Islamic Republic of)
2. Malek-Ashtar University of Technology, Department of Chemistry (Iran, Islamic Republic of)
3. Materials and Energy Research Center (MERC), Ceramic Department (Iran, Islamic Republic of)

High-purity Ti{sub 3}SiC{sub 2} and Ti{sub 3}SiC{sub 2}/Al{sub 2}O{sub 3}-Ni composites with different Al{sub 2}O{sub 3}-Ni contents were fabricated using pulse discharge sintering (PDS) of a mechanical alloyed powder mixture. The synthesis process of monolithic Ti{sub 3}SiC{sub 2} was studied through displacement temperature–time (DTT) curve, displacement rate–time and displacement rate–temperature diagrams obtained during the PDS process. It was found that TiC{sub x} and Ti{sub 5}Si{sub 3}C{sub y} are the intermediate phases and the PDS process completed after 20 min at 1350 °C. The results showed that in Ti{sub 3}SiC{sub 2}/Al{sub 2}O{sub 3}-Ni composite, the Ni part of Al{sub 2}O{sub 3}-Ni leads to decomposition of Ti{sub 3}SiC{sub 2} to TiC{sub x}, Ti{sub 5}Si{sub 3}C{sub y} and Ni(Si){sub x}. No evidence was detected in the reaction between Al{sub 2}O{sub 3} and Ti{sub 3}SiC{sub 2}. The density and hardness of the composites are higher than monolithic Ti{sub 3}SiC{sub 2} due to the production of reinforcing phases. The composite showed lower flexural strength and higher compressive strength than monolithic Ti{sub 3}SiC{sub 2}.

• OSTI ID: 22860382
• Journal Information: Journal of Materials Engineering and Performance, Journal Name: Journal of Materials Engineering and Performance Journal Issue: 7 Vol. 27; ISSN 1059-9495; ISSN JMEPEG
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ALLOY SYSTEMS
ALUMINIUM OXIDES
ATOMIC DISPLACEMENTS
CERAMICS
COMPOSITE MATERIALS
COMPRESSION STRENGTH
FLEXURAL STRENGTH
FLUID FLOW
GROUND MOTION
HARDNESS
HEAT TREATMENTS
IMPURITIES
MICROSTRUCTURE
SILICON CARBIDES
SINTERING
TEMPERATURE RANGE 1000-4000 K
TITANIUM CARBIDES