アルミナ/ステンレス複合体の破面間相互作用 : ステンレス粒子径の影響(<特集>セラミック材料)

概要

論文の詳細を見る
In order to improve the brittleness of ceramic materials, alumina/30vol% stainless steel (SUS316L) composites were prepared and their mechanical properties were studied from the viewpoint of particle size of dispersed stainless steel. The toughening mechanism of the composite was estimated using COD (Crack Opening Displacement) technique. Increase in the particle size was effective in promoting the interaction between fractured surfaces and enhanced the stress shielding of the crack tip, resulting in improvement of the fracture toughness. For the composite prepared from stainless steel with an average particle size of 20μm, the fracture toughness remarkably increased to 9.5MPa・m^<1/2>, compared with 2.4MPa・m^<1/2> for monolithic alumina. Blocking of crack propagation and crack deflection were observed around stainless steel particles, as increasing the particle size.
社団法人日本材料学会の論文
2004-06-15