Effect of Cr2O3 addition on microstructural evolution and mechanical properties of Al2O3
作者： Doh-Hyung Riu , Young-Min Kong , Hyoun-Ee Kim
DOI: 10.1016/S0955-2219(00)00023-6
关键词: Composite material 、 Chromia 、 Flexural strength 、 Shell (structure) 、 Particle-size distribution 、 Ion 、 Elastic modulus 、 Fracture toughness 、 Matrix (geology) 、 Materials science 、 Metallurgy
摘要: Abstract The effects of chromia (Cr 2 O 3 ) additions on the microstructural evolution and mechanical properties alumina (Al were investigated. When small amounts ( added in samples hot pressed at 1500°C, grain size distribution became bimodal; large platelike grains dispersed a relatively grained matrix. composed core region that is free Cr surrounding shell rich Cr. interface between was misfit dislocations. high diffusion rate ions through surface attributed to this evolution. specimens strongly influenced by change. fracture toughness flaw tolerance (R-curve behavior) Al improved markedly formation grains. hardness elastic modulus also increased, however, strength decreased addition .
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