Abstract
Iron-based composites are an important class of wear- and corrosion-resistant materials for the chemical and process industries. The influence of the metal/ceramic interface on the microstructure and mechanical properties of iron-based composites with a high-chromium white iron matrix has been investigated. Three ceramic particle reinforcements (Al 2O 3, TiC, Cr 3C 2) with different chemical behaviour in contact with iron alloys were selected in order to reveal the influence of the resulting different interfaces on the microstructure and mechanical properties of the composites. It was found that the interface of the metal/ceramic system affects the amount of martensitic transformation in the iron-alloy matrix. Regarding the mechanical properties, wear resistance and hardness were not dependent on the nature of the interface; however, toughness deteriorated to a great extent with a weak interface.
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