2014•Ordnance Material Science and EngineeringRequires access

Microstructure of TiB_2 reinforced Co-based cermet composite particles and coating

Xia Chen

Abstract

TiB2-40 Co cermet composite particles were fabricated by mechanical alloying,and TiB2-40 Co coating was fabricated byhigh velocity oxygen fuel method. The microstructure of TiB2-40 Co powder particles and coating was examined by scanningelectron microscopy,and phase compositions of powder particles and coating were investigated by means of X-ray diffraction.The results show that with the milling time prolonging,binder phase Co deforms seriously,and TiB2 exhibits a good bonding withCo powder particle. The coating has dense microstructure,the main phase components of TiB2-40 Co powder and coating are TiB2 and Co. And TiB2-40 Co coating has good durability in the molten Al-12.07%Si alloy after 120 h immersion test.

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Key concepts: Cermet, Materials science, Microstructure, Coating, Composite number, Composite material, Alloy, Phase (matter)