کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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1604465 | 1516015 | 2007 | 6 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: VC, Cr3C2 and NbC doped WC–Co cemented carbides prepared by pulsed electric current sintering VC, Cr3C2 and NbC doped WC–Co cemented carbides prepared by pulsed electric current sintering](/preview/png/1604465.png)
WC–12 wt.% Co grade cemented carbides doped with 0.9 wt.% VC, NbC or Cr3C2 grain growth inhibitor were consolidated by pulsed electric current sintering (PECS), also known as spark plasma sintering (SPS), in the solid state at 1240 °C for 2 min. The microstructure and properties of the PECS material grades are compared with those of pressureless sintered grades, liquid phase sintered at 1420 °C for 1 h. Microstructural and hardness characterization revealed that both the chemical composition and sintering technique play an important role on the WC grain growth and final mechanical properties. To obtain a nanometer sized WC–Co microstructure, it is essential to carefully select the grain growth inhibitor in addition to the application of a fast thermal densification cycle by means of spark plasma sintering.
Journal: International Journal of Refractory Metals and Hard Materials - Volume 25, Issues 5–6, September–November 2007, Pages 417–422