Mechanical properties and microstructure of an Al2O3–SiC–TiC composite
作者： B.I Smirnov , V.I Nikolaev , T.S Orlova , V.V Shpeizman , A.R de Arellano-López
DOI: 10.1016/S0921-5093(97)00744-2
关键词: Hot pressing 、 Mullite 、 Materials science 、 Fracture toughness 、 Composite number 、 Flexural strength 、 Whiskers 、 Composite material 、 Indentation hardness 、 Microstructure
摘要: The mechanical properties and microstructure of a hard, electrodischarge-machinable composite, Al{sub 2}O{sub 3}-SiC-TiC, were studied. material was fabricated by hot pressing 46.1 vol.% 3} powder, 30.9 SiC whiskers 23.0 TiC powder. Significant reaction occurred between the during processing. resultant composite consisted nearly unreacted particles, 3}, plus smaller concentrations SiC, mullite possibly mixture Al-Si-O-C. exhibited at room temperature an elastic modulus 409.6{+-}0.5 GPa, microhardness values 19-32 indentation fracture toughness (KIC) 9.6{+-}0.6 MPa(m)0.5, compressive strength as high 2.8 GPa in bending {approx}680-825 MPa.
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