In-situ alloying of TiC-FeCr cermets in manganese vapour
Conventional vacuum sintering is, in general, inappropriate for producing manganese containing cermets because high vapour pressure combined with high sintering temperature of cermets (1400â1600 °C) causes considerable Mn loss through sublimation and evaporation. Sintering in Mn-rich microatmospher...
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| Autores principales: | , , , , |
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| Formato: | article |
| Lenguaje: | EN |
| Publicado: |
Estonian Academy Publishers
2021
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| Materias: | |
| Acceso en línea: | https://doaj.org/article/6f0f0a22330741b6b3bfda3ad6722efe |
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| Sumario: | Conventional vacuum sintering is, in general, inappropriate for producing manganese containing cermets because high vapour pressure combined with high sintering temperature of cermets (1400â1600 °C) causes considerable Mn loss through sublimation and evaporation. Sintering in Mn-rich microatmosphere does not only prevent Mn loss but also enables additional in-situ alloying of the binder phase during sintering. We studied alloying of TiC-based cermets bonded with high chromium steels, especially TiC-FeCr and TiC-FeCrMn, during sintering in Mn-rich atmosphere. Sintering in manganese vapour was detected to increase sinterability of the cermets, resulting in the formation of a ~1 mm thick Mn-rich surface layer with homogeneous microstructure while the core region of the material remained unaffected. This surface region of sintered TiC-FeCr and TiC-FeCrMn cermets exhibited increased Mn content and competitive mechanical properties â hardness of ~1150 HV30 and indentation fracture toughness of ~12 MPa·m1/2. |
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