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	Synthesis of Ti/sub 3/SiC/sub 2/ bulk materials with B /sub 2/O/sub 3/ additive
	Lifeng Wu ; Chang-An Wang ; Yong Huang
	2010-05-10 ; 2010-05-10
会议名称	Key Engineering Materials ; 3rd International Conference on High-Performance Ceramics (CICC-3) ; Shenzhen, China ; INSPEC
关键词	Experimental/ additives boron compounds diffusion heat treatment hot pressing silicon compounds sintering titanium compounds/ Ti/sub 3/SiC/sub 2/ bulk materials B/sub 2/O/sub 3/ additive hot-pressing sintering raw-material systems elemental titanium silicon carbon reactants titanium carbide heating rate thermal explosion reaction diffusion 2 h 1200 to 1500 degC Ti/sub 3/SiC/sub 2/-B/sub 2/O/sub 3// A8120L Preparation of ceramics and refractories A8120E Powder techniques, compaction and sintering A6630J Diffusion, migration, and displacement of impurities in solids A8140G Other heat and thermomechanical treatments/ time 7.2E+03 s temperature 1.47E+03 to 1.77E+03 K/ Ti3SiC2B2O3/ss B2O3/ss Ti3/ss B2/ss C2/ss O3/ss Si/ss Ti/ss B/ss C/ss O/ss
中文摘要	Ti/sub 3/SiC/sub 2/ bulk materials by hot-pressing sintering were presented through adding a little amount of B/sub 2/O/sub 3/ as a low-temperature additive in different raw-material systems. In one system, elemental titanium, silicon and active carbon were used as reactants with a molar ratio of 3:1:2. In another one, titanium carbide, titanium and silicon reacted together with a molar ratio of 2:1:1. At different temperatures, samples were synthesized by hot-pressing with a heating rate of 30 degrees C min/sup -1 / before 1200 degrees C and then 10 degrees C min/sup -1/ to peak temperatures, holding for 2 h. The effect of sintering temperature on the purity of Ti/sub 3/SiC/sub 2/ was investigated at the range of 1200 degrees C to 1500 degrees C. The products mainly contained Ti/sub 3/SiC/sub 2/ with TiC as the second phase. In some cases, Ti/sub 5/Si/sub 3/ appeared as well. When sintered at 1300 degrees C, above 98 vol% Ti/sub 3/SiC/sub 2/ was obtained in the elemental system. The roles of B/sub 2/O/sub 3/ additive were considered as weakening the thermal explosion reaction in the elemental mixture and affecting the diffusion procedure at low temperature in both systems.
会议录出版者	Trans Tech Publications ; Switzerland
语种	英语 ; 英语
内容类型	会议论文
源URL	[http://hdl.handle.net/123456789/18099]
专题	清华大学
推荐引用方式 GB/T 7714	Lifeng Wu,Chang-An Wang,Yong Huang. Synthesis of Ti/sub 3/SiC/sub 2/ bulk materials with B /sub 2/O/sub 3/ additive[C]. 见:Key Engineering Materials, 3rd International Conference on High-Performance Ceramics (CICC-3), Shenzhen, China, INSPEC.

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