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1 Materials Science Poland

1 2010

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Synthesis of WC-20 wt. % Cu composite powders by co-precipitation and carburization processes

Ardestani M., Arabi H., Razavizadeh H., Rezaie H. R., Mehrjoo H.

Materials Science Poland

2010

Vol. 28, No. 2

413--420

WC/Cu composite powders were synthesized by co-precipitation and subsequent reduction-carburization process. The precipitates contained W-Cu compounds fabricated using a chemical procedure from a mixture of copper nitrate and ammonium paratungstate in distilled water. In order to synthesize the WCCu composite powders, dried precipitates were calcined at 823 K in air and then reduced and carburized by carbon monooxide (CO). The non-isothermal mechanism of reduction-carburization of the calcined powders in carbon monoxide was investigated by thermogravimetry, differential thermogravimetry and X-ray diffraction analyses. The optimum reduction-carburization temperature was determined as 1065 K. The microstructures of the powders were characterized by the scanning electron microscopy.