606 アルミナ基ナノ複合材料の高靭化とアニール効果(ナノコンポジットII,ナノコンポジット,オーガナイスドセッション7)

概要

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Strengthened and toughened alumina-Ni nanocomposites are fabricated using a newly developed soaking method for constructing an intra-type nanostructure. Because the strengthening and toughening mechanisms of intra-type nanocomposites proposed by us are based on dislocation activities even in brittle ceramics, appropriate heat treatments for post-sintered nanocomposites are considered to be necessary to control the dislocation activities. Experimental results reveal that appropriately annealed nanocomposites show higher fracture toughness, higher strength, and larger critical frontal process zone (FPZ) size. Thus, it is demonstrated that toughening in nanocomposites occurs by an FPZ expansion mechanism.
社団法人日本材料学会の論文
2006-05-26