Development of WC-Fe3Al Composites by Spark Plasma Sintering Process

Luis Antonio C. Ybarra; Afonso Chimanski; Sergio Gama; Ricardo A.G. da Silva; Izabel Fernanda Machado; Humberto Naoyuki Yoshimura

doi:10.4028/www.scientific.net/MSF.881.307

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HomeMaterials Science ForumMaterials Science Forum Vol. 881Development of WC-Fe3Al Composites by Spark Plasma...

Development of WC-Fe₃Al Composites by Spark Plasma Sintering Process

Abstract:

Tungsten carbide (WC) based composites are usually produced with cobalt, but this binder has the inconvenience of shortage, unstable price and potential carcinogenicity. The objective of this study was to develop WC composite with intermetallic Fe₃Al matrix. Powders of WC, iron and aluminum, with composition WC-10 wt% Fe₃Al, and 0.5 wt% zinc stearate were milled in a vibration mill for 6 h and sintered in a SPS (spark plasma sintering) furnace at 1150 °C for 8 min under pressure of 30 MPa. Measured density and microstructure analysis showed that the composite had significant densification during the (low-temperature, short time) sintering, and X-ray diffraction analysis showed the formation of intermetallic Fe₃Al. Analysis by Vickers indentation resulted in hardness of 11.2 GPa and fracture toughness of 24.6 MPa.m^1/2, showing the feasibility of producing dense WC-Fe₃Al composite with high mechanical properties using the SPS technique.

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Periodical:

Materials Science Forum (Volume 881)

Pages:

307-312

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.881.307

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Online since:

November 2016

Authors:

Luis Antonio C. Ybarra, Afonso Chimanski, Sergio Gama, Ricardo A.G. da Silva, Izabel Fernanda Machado, Humberto Naoyuki Yoshimura

Keywords:

Composite, Fe₃Al, Intermetallic, Powder metallurgy, Spark Plasma Sintering, WC

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