| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1602796 | International Journal of Refractory Metals and Hard Materials | 2015 | 6 Pages |
•Constituents and FeAl composition were investigated in WC–FeAl composites.•These factors depended on the oxygen content of the composites.•The oxidation of FeAl increased Fe ratio in the FeAl composition.•Higher oxygen content resulted in the generation of Fe3W3C.•This compound may suppress the WC grain growth during the sintering.
This paper addressed on the changes in constituents and FeAl compositions by oxidation in WC–FeAl composite — one of the alternative materials of WC–Co hard material. Two kinds of WC–FeAl samples having different oxygen contents were obtained by controlling the powder preparation processes. Fe3W3C and various oxides including α-Al2O3 were present as semi-products in the sample of higher oxygen content whereas AlFe3C0.5 and slight amount of α-Al2O3 were present in the sample of lower oxygen content. The composition of FeAl phases depended on the oxygen content; the ratio of Fe in the FeAl phases was larger in the composite of higher oxygen content. It was found that the oxygen content strongly influenced the constituents and FeAl composition, which linked with WC grain growth in WC–FeAl composites.
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