Oxidation of WC-Co, WC-Ni and WC-Co-Ni hard metals in the temperature range 500–800 °C

Autor:	V. B. Voitovich, R. F. Voitovich, É. I. Golovko, V.V. Sverdel
Rok vydání:	1996
Předmět:	Materials science Kinetics Non-blocking I/O Metallurgy Alloy Atmospheric temperature range engineering.material Redox Hard metals Degree (temperature) chemistry.chemical_compound Chemical engineering chemistry Tungsten carbide engineering
Zdroj:	International Journal of Refractory Metals and Hard Materials. 14:289-295
ISSN:	0263-4368
DOI:	10.1016/0263-4368(96)00009-1
Popis:	Oxidation of WC-16%Co, WC-8%Co-8%Ni and WC-16%Ni hard metals in the temperature range between 500 and 800 °C was investigated by TGA, XRD and SEM methods. The thermodynamics of tungsten carbide oxidation reactions was calculated. Oxidation kinetics of the alloys follows a complex behaviour. The WC-16%Co alloy is oxidized to a lesser degree than the WC-16%Ni alloy in the temperature range 650–800 °C. Oxidation resistance of hard metals is governed by phase composition, formation mechanism of the scales and protective properties of the oxidation products (CoO, NiO, WO3 and complex oxides, based on the formula (Ni, Co)WO4).
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::d97ee818735dd46277724b707945986e https://doi.org/10.1016/0263-4368(96)00009-1 Zobrazit plný text záznamu Full Text from ScienceDirect