Functionally graded TiC-based cermets

M. P. Dariel, S. Sabatello, L. Levin, N. Frage

Research output: Contribution to journalConference articlepeer-review

Abstract

A well-known approach for manufacturing ceramic-metal composites is based on infiltration of a ceramic preform by a molten metal. The particular properties of the TiCx-M system (M is an infiltrating metal) allow to follow two different strategies in order to generate functionally graded structures. According to the first approach a graded distribution of porosity is generated in the carbide preform by taking advantage of the dependence of the sinterability on the carbon content (x). Liquid metal infiltration generates a varying ceramic-to-metal ratio and a concurrent property profile. According to the second approach, a pre-designed spatial carbon variation in a TiCx preform generates a corresponding affinity variation towards an infiltrating carbon containing molten alloy, e.g. a carbon steel. By appropriate heat treatments and as a function of the carbon content, one can induce significant variations and produce pre-designed property profiles in the metallic component and, thence, in the ceramic-metal composite. Examples will be put forward in order to illustrate the two approaches.

Original languageEnglish
Pages (from-to)493-499
Number of pages7
JournalMaterials Science Forum
Volume308-311
DOIs
StatePublished - 1 Jan 1999
EventProceedings of the 1998 5th International Symposium on Functionally Graded Materials, FGM '98 - Dresden, Ger
Duration: 26 Oct 199829 Oct 1998

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