کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1604716 | 1516020 | 2006 | 4 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Preparing nano-crystalline rare earth doped WC/Co powder by high energy ball milling Preparing nano-crystalline rare earth doped WC/Co powder by high energy ball milling](/preview/png/1604716.png)
The nano-crystalline rare earth doped WC/Co powder was prepared by high energy ball milling. The nano-crystalline powders were characterized by means of XRD (X-ray diffraction), SEM (scanning electron microscope) and DTA (differential thermal analysis). The results show that adding trace rare earth elements into carbides is effective to minish the grain size of WC/Co powder. The grain size of rare earth doped powder became two times smaller as compared with the undoped powder within ball milling times of 25–45 h. The XRD peak of Co phase disappeared after 25 h ball milling. A sharp peak of heat release at the temperature of 597 °C was emerged in DTA curve within the range of heating temperature. After consolidated the rare earth doped WC/Co alloy by high energy ball milling exhibits ultra-fine grain sizes and better mechanical properties.
Journal: International Journal of Refractory Metals and Hard Materials - Volume 24, Issue 6, November 2006, Pages 461–464