Preparation of TiCW core–shell structured powders by one-step activation and chemical reduction process》.pdfVIP

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Preparation of TiCW core–shell structured powders by one-step activation and chemical reduction process》.pdf

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Preparation of TiCW core–shell structured powders by one-step activation and chemical reduction process》.pdf

Journal of Alloys and Compounds 619 (2015) 704–708 Contents lists available at ScienceDirect Journal of Alloys and Compounds journal homepag e: www.elsevier.c om/locate/jalcom Preparation of TiC/W core–shell structured powders by one-step activation and chemical reduction process Xiao-Yu Ding a, Lai-Ma Luo a,c,⇑, Li-Mei Huang a, Guang-Nan Luo b, Xiao-Yong Zhu a,c, Ji-Gui Cheng a,c, Yu-Cheng Wu a,c,⇑ a College of Materials Science and Engineering, Hefei University of Technology, Hefei 230009, China b Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031, China c Engineering Research Center of Powder Metallurgy of Anhui Province, Hefei 230009, China a r t i c l e i n f o a b s t r a c t Article history: In the present study, one-step activation and chemical reduction process as a novel wet-chemical route Received 19 December 2013 was performed for the preparation of TiC/W core–shell structured ultra-ﬁne powders. The XRD, FE-SEM, Received in revised form 21 July 2014 TEM and EDS results demonstrated that the as-synthesized powders are of high purity and uniform with Accepted 28 August 2014 a diameter of approximately 500 nm. It is also found that the TiC nanoparticles were well-encapsulated Available online 16 September 2014 by W shells. Such a unique process suggests a new method for preparing X/W (X refers the water-insol- uble nanoparticles) core–shell nanoparticles with different cores. Keywords: