Journal
INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS
Volume 43, Issue -, Pages 322-328Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.ijrmhm.2013.10.006
Keywords
Ti(C,N)-based cermets; TiN; Erosion; Erosion-corrosion
Funding
- National Natural Science Foundation of China [51074110, 50874076]
- Chengdu Science and Technology Project [10GGZD080GX-268, 11DXYB096JH-027]
- Research funds for the Central Universities [2011SCU11038]
- Sichuan Science and Technology Project [2013GZX0146]
- Scientist Serving Enterprise Action Plan are from the Ministry of Science and Technology of China [2009GJF00030]
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Ti(C,N)-based cermets are fabricated with diverse contents of TiN addition by traditional powder metallurgy technique. The microstructure and properties are investigated and discussed. The influence of TiN content on the erosion and erosion-corrosion resistance is researched under alkaline conditions. Results reveal that the grain size decreases along with the increase of TiN. However, too much TiN results in incompact material and residual porosities in cermets. The grain size plays an important role in wear behavior. The effect of TiN content on erosion-corrosion of Ti(C,N)-based cermets is the same as that on erosion. It is advantageous for the wear resistance to add a small amount of TiN. Excessive TiN makes the wear resistance decrease on the contrary. In alkaline slurry, the cermets with coarse grains deteriorate largely due to corrosion which decreases the mechanical properties and speeds up the total loss of material. Nevertheless, the mechanical erosion is responsible for the degradation of cermets with fine grains. Cermets with 7.5 wt.% TiN addition have the highest erosion and erosion-corrosion resistance. (C) 2013 Published by Elsevier Ltd.
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