Strengthening and Toughening of B_4C-TiB_2 Multiphase Ceramics
Source abstract
Abstract
B4C-TiB2 composites were prepared by hot-pressing process at 2050°C. The effects of TiB2 particlecontent on the fracture toughness, bending strength and Vickers hardness of B4C-TiB2 composites werestudied. The addition of 3Ovol% TiB2 raised the bending strength of B4C to the peak value of 725MPa, 65%higher than monolithic B4C. An 84% increase of composite toughness up to 6.7MP.m1/2 was discoveredupon the incorporation of 45vol% TiB2 particles into B4C matrix. The crack deflection caused by theresidual stress resulting from the difference in thermal cxpansion coefficient between B4C and TiB2 is themain mechanism responsible for the increase of toughness.
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Research context
OpenAlex topics: Aluminum Alloys Composites Properties · Boron and Carbon Nanomaterials Research · Advanced ceramic materials synthesis
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