Study on the oxidation of WC-Co cemented carbide under different conditions

The oxidation of cemented carbide can affect its service performance due to the significant reduction in mechanical properties. This paper investigates the oxidation of WC-Co cemented carbide under both isothermally and laser irradiation conditions. The nanosecond pulsed laser was used to perform la...

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Bibliographic Details
Published in:International journal of refractory metals & hard materials 2021-01, Vol.94, p.105381, Article 105381
Main Authors: Wu, Xian, Shen, Jianyun, Jiang, Feng, Wu, Hairong, Li, Liang
Format: Article
Language:English
Subjects:
Cemented carbide
Cemented carbides
Cobalt
Cotton
Gaussian beams (optics)
Isothermal oxidation
Laser beams
Laser induced oxidation
Lasers
Mechanical properties
Mountains
Oxidation
Oxide layer
Oxygen content
Pulsed lasers
Tungsten carbide
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Summary:The oxidation of cemented carbide can affect its service performance due to the significant reduction in mechanical properties. This paper investigates the oxidation of WC-Co cemented carbide under both isothermally and laser irradiation conditions. The nanosecond pulsed laser was used to perform laser-induced oxidation in both air and pure oxygen. In comparison, the microstructures of oxide layer in laser-induced oxidation were very different to isothermal oxidation. The more porous oxide layers with spider web and cotton microstructure were observed in laser-induced oxidation. The oxide layer on material surface was stacked a small mountain shape due to the Gaussian profile of pulsed laser beam. The oxygen content curve showed a rapidly increasing trend at the beginning, and then became stable with increasing laser power. •The oxide layer was honeycomb structure in isothermal oxidation, spider web and cotton microstructure in laser oxidation.•The oxide layer on material surface was stacked a small mountain shape due to the Gaussian profile of pulsed laser beam.•The oxygen content showed a rapidly increasing trend at the beginning and then became stable with increasing laser power.
ISSN:0263-4368
2213-3917
DOI:10.1016/j.ijrmhm.2020.105381