Influence of Different BN Grades on Sintering Behaviour, Microstructure and Properties of Machinable Si 3 N 4 ‐MoSi 2 ‐BN Composites | Zendy

Medri V. | Zendy; Dalle Fabbriche D. | Zendy; Melandri C. | Zendy; Guicciardi S. | Zendy; Bellosi A. | Zendy

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Influence of Different BN Grades on Sintering Behaviour, Microstructure and Properties of Machinable Si 3 N 4 ‐MoSi 2 ‐BN Composites

Author(s) -

Medri V.,

Dalle Fabbriche D.,

Melandri C.,

Guicciardi S.,

Bellosi A.

Publication year - 2006

Publication title -

advanced engineering materials

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.938

H-Index - 114

eISSN - 1527-2648

pISSN - 1438-1656

DOI - 10.1002/adem.200500228

Subject(s) - materials science , machinability , microstructure , composite material , ceramic , diamond , sintering , hot pressing , machining , carbide , pressing , anisotropy , metallurgy , physics , quantum mechanics

The machinability of ceramic materials can be improved by the addition of hexagonal‐BN: the expensive diamond‐based tools could be replaced by cemented carbides tools lowering the machining costs. Anisotropic materials are obtained by hot pressing due to h‐BN plate‐like structure. Si 3 N 4 ‐BN composites are suitable as rotor seals for gas turbine engines in the ranges 1000°C–1300°C. Oxidation resistance can be improved up to 1500°C by the addition of MoSi 2 .

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