Technological Peculiarities of Chromium Carbide-Based Iron Alloy Bonded Cermet

Abstract:

Cr₃C₂-Ni cermets exhibit high hardness and excellent corrosion, oxidation, abrasive and erosion resistance. However, nickel is toxic and carcinogen and because of that great efforts were made to displace or replace nickel in the composition of cermets. Therefore, in the present research chromium carbide-based cermets with FeCr-type ferritic binder was fabricated and investigated. Composites were sintered at different conditions: vacuum and spark plasma sintering. Spark plasma sintered cermets demonstrated acceptable structure and mechanical characteristics. Chemical composition of chromium carbide-based iron alloy bonded cermets was analyzed by energy-dispersive X-ray spectroscopy and structural analysis was carried out using X-ray diffraction. Sintered cermet consists of two main phases: α-Fe and (Cr,Fe)₇C₃ complex dicarbide. Mechanical characterizations – hardness and fracture toughness – was performed. Also oxidation rates were determined.

• Periodical: Solid State Phenomena (Volume 267)
• Pages: 82-86
• DOI: https://doi.org/10.4028/www.scientific.net/SSP.267.82
• Online since: October 2017
• Authors: Märt Kolnes*, Jakob Kübarsepp, Mart Viljus, Rainer Traksmaa
• Keywords: Chromium Carbide-Based Cermets, Oxidation Resistance, Spark Plasma Sintering, Structure Formation

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