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Study on the formation of core-rim structure in Ti(CN)-based cermets

Author:: Li, Pingping Ye, Jinwen Liu, Ying Yang, Dujuan Yu, Haijun
Journal:: INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS
Issue Date:: 2012
Abstract(summary):: Ti(CN)-based cermets were synthesized from Ti(CN)-WC-Mo2C-TaC-Ni-Co composite powders by vacuum-low pressure sintering. The phase evolution and the formation of core-rim structure in Ti(CN)-based cermets were systemically investigated during difference reaction stages at 950-1450 degrees C. The results show that the secondary carbides such as Mo2C and TaC are begun to dissolve at 950 degrees C, finished at 1150 degrees C, and the solution temperature of WC phase is range from 1150 to 1300 degrees C, which are result in increase of the cermets lattice constant. At the same time, the inner rim is also formed, and Ti(CN)-based cermets are composed of (Ti, W, Mo, Ta)(CN) and Ni/Co solid solution phase. While at 1350 degrees C, it was found that the outer rim began to precipitate from the liquid phase with the metal binder. With increase of sintering temperature, mechanical properties of cermets improved obviously were related intimately to the increase of outer rim thickness. (C) 2012 Elsevier Ltd. All rights reserved.
Page:: 27---31

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Cited By

Shi, Zengmin, Zhang, Dayong, Chen, Shuang, Wang, Tianliang. Effect of nitrogen content on microstructures and mechanical properties of Ti(C, N)-based cermets[J]. JOURNAL OF ALLOYS AND COMPOUNDS,2013:68---72.
Xu, Qingzhong, Ai, Xing, Zhao, Jun, Zhang, Hongshan, Qin, Wenzhen, Gong, Feng. Effect of heating rate on the mechanical properties and microstructure of Ti(C,N)-based cermets[J]. MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,2015:281---287.
Chao, Sheng, Goldsmith, Jason, Banerjee, Dev. null[J]. INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS,2015:314---319.
Yang, Qingqing, Xiong, Weihao, Zhang, Guopeng, Huang, Bin. Grain Growth in Ti(C,N)-Based Cermets During Liquid-Phase Sintering[J]. JOURNAL OF THE AMERICAN CERAMIC SOCIETY,2015:1005---1012.

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Study on the formation of core-rim structure in Ti(CN)-based cermets

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