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首页> 外文期刊>Journal of Materials Research >Simultaneous spark plasma synthesis and consolidation of WC/Co composites
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Simultaneous spark plasma synthesis and consolidation of WC/Co composites

机译：WC / Co复合材料的同步火花等离子体合成和固结

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摘要

The single-step synthesis and densification of the WC-6Co cemented carbide starting from elemental powders was obtained by the spark plasma sintering (SPS) technique. The operating conditions that guarantee the complete conversion of the reactants to the desired full dense material have been identified. Specifically, under the application of 800 A and a mechanical pressure of 40 MPa for about 200 s, a product with relative density higher than 99 percent, hardness of 14.97 ± 0.35 GPa, and 12.5 +- 1.0 MPa m~(0.5) fracture toughness was obtained. A kinetic investigation of the SPS process was also performed. It revealed that an intermediate phase, i.e., W_2C, is the first carbide formed during the carburization process. It was observed that the synthesis and sintering stages take place simultaneously. It was also found that as the applied pulsed current intensity was augmented, the synthesis/sintering time required decreased significantly.
机译：WC-6Co硬质合金从元素粉末开始的一步合成和致密化通过火花等离子体烧结（SPS）技术获得。已经确定了保证反应物完全转化为所需的全密实材料的操作条件。具体地，在800A的施加和40MPa的机械压力下持续约200s，相对密度高于99％，硬度为14.97±0.35GPa，并且断裂韧性为12.5±1.0MPa m〜（0.5）的产品。获得了。还对SPS过程进行了动力学研究。结果表明，在渗碳过程中形成的第一个碳化物是中间相，即W_2C。观察到合成和烧结阶段同时进行。还发现随着所施加的脉冲电流强度的增加，所需的合成/烧结时间显着减少。

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  • 来源
    《Journal of Materials Research》 |2005年第3期|p.734-741|共8页
  • 作者

    Antonio Mario Locci; Roberto Orru; Giacomo Cao;

  • 作者单位

    Dipartimento di Ingegneria Chimica e Material!, Centra Studi sidle Reazioni Autopmpaganti (CESRA), and Unitd di Ricerca del Consorzio Interuniversitario per la Scienza e Tecnologia del Material! (INSTM), Universita degli Studi di Cagliari, 09123 Cagl;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 工程材料学;
  • 关键词

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