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

Microwave-assisted synthesis of vanadium and chromium carbides nanocomposite and its effect on properties of WC-8Co cemented carbides
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微波辅助合成钒铬碳化物纳米复合材料及其对WC-8Co硬质合金性能的影响

DOI:
10.1016/j.scriptamat.2016.04.024
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发表时间:
2016-07
期刊:
影响因子:
6
通讯作者:
赵志伟
赵志伟
中科院分区:
材料科学1区
文献类型:
--
作者:
赵志伟

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采用原位微波加热新方法制备碳化钒铬(V8C7-Cr3C2)纳米复合材料及其合金。所制备的纳米复合材料用作硬质合金的晶粒生长抑制剂。可以在较低的温度下合成分散良好的平均直径约为30 nm的V8C7-Cr3C2纳米复合材料。所制备的纳米复合材料对WC-8Co合金的显微组织和性能具有重要影响。 WC-8Co-0.8(V8C7-Cr3C2)合金的显微组织比WC-8Co合金更加均匀。前者的维氏硬度和断裂韧性较后者可提高7%左右。
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-Cr3C2nanocomposite 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.
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