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Materials Science and Engineering of Powder Metallurgy  2020, Vol. 25 Issue (6): 486-496    DOI:
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Microstructure and properties of bindeless Ti(C,N)-based cermets prepared by spark plasma sintering
LU Saijun, KANG Xiyue, ZHANG Meimei, HE Yuehui
State Key Laboratory of Powder Metallurgy, Central South University, Changsha 410083, China
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Abstract  The binderless Ti(C,N)-based cermets were fabricated by spark plasma sintering using Ti(C,N) powder as raw materials. The microstructure, mechanical properties, wear resistance of the materials were studied. Effects of sintering temperature, carbon black addition, carbides additives and solid solution raw powders on the relative density and mechanical properties were investigated. Furthermore, the (Ti,W,Mo,Ta) (C,N) solid solution powder fabricated by the dissolving of other alloying elements in the lattice of Ti(C,N) was also used to prepare the binderless cermets. The experimental results show that the relative density and mechanical properties of binderless cermets increase with increasing sintering temperature. With increasing carbon black content, the relative density and mechanical properties increase firstly and then decrease. After adding WC, Mo2C and TaC carbides into Ti(C,N) powder, or using (Ti,W,Mo,Ta) (C,N) solid solution powder as raw materials, the oxygen content of Ti(C,N)-based cermets with bindeless phase is obviously reduced. The density and mechanical properties of the materials are greatly improved, and the friction coefficient and wear resistance of the materials are lower. The binderless Ti(C,N)-based cermet prepared by (Ti,W,Mo,Ta) (C,N) solid solution powders exhibits hardness (HV30) of 19.9 GPa, transverse rupture strength of 1 030 MPa and fracture toughness of 7.8 MPa·m1/2.
Key wordsbinderless Ti(C,N)-based cermets      sintering temperature      carbon content      mechanical properties      friction and wear     
Received: 15 September 2020      Published: 18 January 2021
ZTFLH:  TG148  
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LU Saijun
KANG Xiyue
ZHANG Meimei
HE Yuehui
Cite this article:   
LU Saijun,KANG Xiyue,ZHANG Meimei, et al. Microstructure and properties of bindeless Ti(C,N)-based cermets prepared by spark plasma sintering[J]. Materials Science and Engineering of Powder Metallurgy, 2020, 25(6): 486-496.
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