Effect of Iron Additive on the Sintering Behavior of Hot-Pressed ZrC-W Composites

Yu Jin Wang; Lei Chen; Tai Quan Zhang; Yu Zhou

doi:10.4028/www.scientific.net/KEM.368-372.1764

Paper Titles

Oxidation of Short Carbon Fiber Reinforced ZrB₂-SiC Ceramics under Atmospheric and Oxyacetylene Torch Conditions
p.1753

Preparation and Characterization of Stable ZrB₂-Based Ultra-High Temperature Ceramics Slurry by Aqueous Gelcasting
p.1756

Reactive Synthesis and Mechanical Properties of ZrB₂-SiC-ZrC Composites
p.1758

Properties and Microstructure of an HfB₂-HfC-SiC Ultra High Temperature Ceramics
p.1761

Effect of Iron Additive on the Sintering Behavior of Hot-Pressed ZrC-W Composites
p.1764

Combustion Synthesis of Si₃N₄ from Si/NH₄Cl at Low Nitrogen Pressure
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Preparation and Properties of 2D C/SiC-TaC Composites
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Effects of Oxygen Content on the Properties of Ultra-High-Temperature Resistant Si-Al-C Fibers
p.1774

Processing and Characterization of Ultra-High Temperature Oxide Fiber-Reinforced Oxide Ceramic Matrix Composites with Improved Thermomechanical Properties
p.1778

HomeKey Engineering MaterialsKey Engineering Materials Vols. 368-372Effect of Iron Additive on the Sintering Behavior...

Effect of Iron Additive on the Sintering Behavior of Hot-Pressed ZrC-W Composites

Abstract:

The ZrC-W composites with iron as sintering additive were fabricated by hot-press sintering. The densification, microstructure and mechanical properties of the composites were investigated. The incorporation of Fe beneficially promotes the densification of ZrC-W composites. The relative density of the composite sintered at 1900°C can attain 95.3%. W2C phase is also found in the ZrC-W composite sintered at 1700°C. The content of W2C decreases with the increase of sintering temperature. However, W2C phase is not identified in the composite sintered at 1900°C. The flexural strength and fracture toughness of the composites are strongly dependent on sintering temperature. The flexural strength and fracture toughness of ZrC-W composite sintered at optimized temperature of 1800°C are 438 MPa and 3.99 MPa·m1/2, respectively.