Fracture Toughness and Hardness of Ti(C_0.7N_0.3)-19Mo₂C-xNbC-24Ni

Abstract:

The fracture toughness and hardness of Ti (C_0.7N_0.3)-19Mo₂C-xNbC-24Ni cermets (x = 0, 5, 20) were studied. Fracture toughness of 5 NbC was the largest, and it of 20 NbC was the lowest. The microstructures of all the cermets consisted of Ti (C,N) and solid soluted Ti (C,N) hard phase, and Ni binder phase. The solid soluted Ti (C,N) surrounded Ti (C,N), namely, core-rim structures were observed in 0NbC and 5NbC. On the other hand, the isolated Ti (C,N) and solid soluted Ti (C,N) were observed in 20NbC, as a result of the phase separation between Ti (C,N) core and solid soluted Ti (C,N).

• Periodical: Advanced Materials Research (Volume 1088)
• Pages: 255-259
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.1088.255
• Online since: February 2015
• Authors: Hiroyuki Hosokawa*, Kiyotaka Katou, Koji Shimojima, Ryoichi Furushima, Akihiro Matsumoto
• Keywords: Cermet, Mechanical Property, Microstructure, NbC, Ti(C,N)

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