Fabrication of W–1 wt.% TiC composites by spark plasma sintering》.pdf

Fusion Engineering and Design 92 (2015) 29–34 Contents lists available at ScienceDirect Fusion Engineering and Design j o u r n a l h o m e p a g e: w w w. elsev /locate/fusengdes Fabrication of W–1 wt.% TiC composites by spark plasma sintering Xiao-Yu Ding a , Lai-Ma Luo a,c,∗ , Hong-Yu Chen a , Guang-Nan Luo b , Xiao-Yong Zhu a,c , Xiang Zan a,c , Ji-Gui Cheng a,c , Yu-Cheng Wu a,c,∗ a School 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 Laboratories of Nonferrous Metal Material and Processing Engineering of Anhui Province, Hefei 230009, China h i g h l i g h t s g r a p h i c a l a b s t r a c t • TiC/W nanoparticles with core–shell structure were produced by chemical method. • TiC particles were dispersed in the tungsten grains and grain bound- aries. • The grain size and relative density of W–TiC composite were 3 m and 98.6%, respectively. a r t i c l e i n f o a b s t r a c t Article history: TiC/W ultra-fine powders were produced by one-step activation and chemical reduction process. The Received 20 June 2014 powders were consolidated by spark plasma sintering (SPS) at 1800 ◦ C to suppress grain growth during Received in revised form 15 October 2014 sintering. The grain size, relative density and the Vicker hardness HV0.2 of the bulk sample fabricated Accepted 5 January 2015 by SPS were 3 m, 98.6% an