Abstract
The high-temperature mechanical properties of both Ti3AlC2 and Ti3AlC2/10 vol.%Al2O3 composite, including compressive strength, bending strength, and fracture behavior, were investigated. The strengthening effect caused by Al2O3 strongly depended on the mode of failure: significant enhancement in strength was only observed under the brittle mode of failure; whereas under the ductile mode of failure the strengthening effect was impaired due to Ti3AlC2 matrix softening and stress relaxation.
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The authors thank Dr. P. Y. Hou of Lawrence Berkeley National Laboratory for her useful suggestions and polishing of English. This work was supported by the National Outstanding Young Scientist Foundation for Y. C. Zhou under grant No. 59925208, the National Natural Sciences Foundation of China under grant No. 50232040, No. 50302011, No.90403027, and the “863” Project under grant No. 2002AA332030.
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