The Microstructural Change near the Surface of Ti(G, N)-Mo2C-Ni Sintered Compacts

Hisashi Suzuki; Koji Hayashi; Hideaki Matsubara

doi:10.2497/jjspm.29.58

The Microstructural Change near the Surface of Ti(G, N)-Mo2C-Ni Sintered Compacts

Hisashi Suzuki, Koji Hayashi, Hideaki Matsubara

Research output: Contribution to journal › Article › peer-review

5 Citations (Scopus)

Abstract

The anomalous structures appearing near the specimen surface were studied for Ti(C,N)-Mo2C-Ni alloys prepared by vacuum-sintering. It was found that surrounding structures of carbonitride particles were not observed in the surface layer (such a layer is named “surrounding structure free layer, SSFL”), and that the formation of SSFL was related to the nitrogen loss from specimen surface during sintering. The thickness increase of SSFL was restrained with the increase of sintering time, in contrast to a previous result reported by the authors on the - free layer in nitrogen contained WC-Co alloys. This phenomenon would be understood, considering the following fact being peculiar to this alloy system, that the solutes concentration gradient near the surface layer decreases with increasing thickness of SSFL. In addition, changes in hardness, lattice parameter of hard phases, etc., near the surface layer were discussed.

Original language	English
Pages (from-to)	58-61
Number of pages	4
Journal	journal of the japan society of powder and powder metallurgy
Volume	29
Issue number	2
DOIs	https://doi.org/10.2497/jjspm.29.58
Publication status	Published - 1982 Jan
Externally published	Yes

ASJC Scopus subject areas

Mechanical Engineering
Industrial and Manufacturing Engineering
Metals and Alloys
Materials Chemistry

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abstract = "The anomalous structures appearing near the specimen surface were studied for Ti(C,N)-Mo2C-Ni alloys prepared by vacuum-sintering. It was found that surrounding structures of carbonitride particles were not observed in the surface layer (such a layer is named “surrounding structure free layer, SSFL”), and that the formation of SSFL was related to the nitrogen loss from specimen surface during sintering. The thickness increase of SSFL was restrained with the increase of sintering time, in contrast to a previous result reported by the authors on the - free layer in nitrogen contained WC-Co alloys. This phenomenon would be understood, considering the following fact being peculiar to this alloy system, that the solutes concentration gradient near the surface layer decreases with increasing thickness of SSFL. In addition, changes in hardness, lattice parameter of hard phases, etc., near the surface layer were discussed.",

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