Metal-ceramic composites based on the Ti-B-Cu porosity system View Full Text


Ontology type: schema:ScholarlyArticle     


Article Info

DATE

1992-01

AUTHORS

H. P. Li, S. B. Bhaduri, J. A. Sekhar

ABSTRACT

A systematic study of the microstructure/fracture toughness/processing correlation of metal-ceramic composites in the Ti-B-Cu porosity system is presented. The composites are produced by the combustion synthesis process. Fracture surfaces indicate both ductile and brittle regions. The composites are made up of Ti as the only ductile phase and TiB, TiB2, Ti2Cu, and Ti3Cu4 as brittle phases. Density measurements and scanning electron microscopy (SEM) indicate that the samples contain distributed porosity. Ductile phase toughening is responsible for the increase in fracture toughness to a maximum value of 9.9 MPa(m)1/2. Samples with large amounts of porosity do not benefit from this toughening process even though they containin situ formed whiskers. The fracture toughness of the composite is modeled by considering the additive influence of the ductile phase reinforcement (Ashby model) and the residual porosity (exponential model). Microstructural constants required for the model are evaluated from the comparison. A correlation between the mechanical properties and the combustion temperature is established. More... »

PAGES

251-261

Identifiers

URI

http://scigraph.springernature.com/pub.10.1007/bf02660869

DOI

http://dx.doi.org/10.1007/bf02660869

DIMENSIONS

https://app.dimensions.ai/details/publication/pub.1022425480


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