Microwave-assisted synthesis of vanadium and chromium carbides nanocomposite and its effect on properties of WC-8Co cemented carbides

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• 作者：Zhiwei Zhao ^{zhiwei_zhao@haut.edu.cn" class="auth_mail" title="E-mail the corresponding author}
• 关键词：Cemented carbides ; Grain growth inhibitor ; Microwave sintering ; Microstructure ; Properties
• 刊名：Scripta Materialia
• 出版年：2016
• 出版时间：15 July 2016
• 年：2016
• 卷：120
• 期：Complete
• 页码：103-106
• 全文大小：1029 K

文摘

A new method of in-situ microwave heating is used to prepare vanadium and chromium carbides (V₈C₇-Cr₃C₂) nanocomposite and their alloys. The as-prepared nanocomposite was used as the grain growth inhibitor of cemented tungsten carbides. Well dispersed V₈C₇-Cr₃C₂ nanocomposite with a mean diameter of about 30 nm can be synthesized at lower temperature. The prepared nanocomposite has an important effect on the microstructure and properties of WC-8Co alloys. The microstructure of WC-8Co-0.8(V₈C₇-Cr₃C₂) alloys is more uniform than that of WC-8Co alloys. Vickers hardness and fracture toughness of the former can be increased by about 7% compared with those of the latter.