Fracture behaviour of a TiB2-based ceramic composite material |
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| Authors: | M. K. Bannister M. V. Swain |
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| Affiliation: | (1) Advanced Materials Technology Centre, Mechanical Engineering Department, University of Sydney, 2006 Sydney, NSW, Australia;(2) Present address: Department of Materials Engineering, University of California, Santa Barbara, USA |
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| Abstract: | ![]()
The fracture behaviour of a multicomponent TiB2/BN/AlN material was studied in both the double cantilever beam (DCB) and single-edge-notched beam (SENB) geometries. Crack growth in the SENB geometry at various stages of the test was monitored using optical and electron microscopes. R-curve behaviour was found in both specimen geometries for this material. Evidence of crack-interface tractions were found in the form of (i) ligamentary bridges and (ii) frictional interlocks, along with evidence for microcracking about the crack tip. Measurements of crack-opening displacement with distance back from the crack tip were made. The inflection point of such data is in agreement with the range of the measuredR-curve. |
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