Sintering technology of Ti(C, N) base cermets

The variations of chemical compositions, phases, microstructure evolution and shrinking of cermets compact debinded in H 2 or in vacuum and sintered subsequently in vacuum were studied systematically using chemical analysis, back scattering scanning electron microscopy (SEM), and X-ray diffractometr...

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Bibliographic Details
Published in:Transactions of Nonferrous Metals Society of China 2009-12, Vol.19, p.s696-s700
Main Authors: ZHOU, Shu-zhu, TAN, Jin-hao, PENG, Wei-zhen, WANG, She-quan, LI, Ping
Format: Article
Language:English
Subjects:
Carbon
Cermets
composition
Decomposition reactions
Diffraction
Evolution
microstructure
Phases
Scanning electron microscopy
shrinkage
Sintering
Ti(C, N) cermets
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Summary:The variations of chemical compositions, phases, microstructure evolution and shrinking of cermets compact debinded in H 2 or in vacuum and sintered subsequently in vacuum were studied systematically using chemical analysis, back scattering scanning electron microscopy (SEM), and X-ray diffractometry (XRD). The total carbon of cermets debinded in H 2 is lower than that debinded in vacuum by 0.4%–0.5%. The contents of carbon and oxygen are decreased sharply when being sintered at 1 100–1 300 °C. The decomposition reaction of nitrogen is conducted sharply at 1 300 °C. However, the decomposition of nitrogen is inhibited while the liquid phase appears, and then begins again above 1 500 °C. The solution reaction of TaC and Mo 2C into ring phase starts at 1 200 °C, and WC into ring phase at 1 300 °C is finished. Therefore, the heating rate during sintering of cermets between 900 °C and 1 350 °C is important.
ISSN:1003-6326
DOI:10.1016/S1003-6326(10)60134-3