Y-TZP/M型ヘキサフェライトコンポジットのin situプロセッシング

概要

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3Y-TZP/20 mass% La{Co_<0.5>Fe_<0.5>(Fe_<0.9>Al_<0.1>)_<11>}O_<19> composites were successfully synthesized in situ during sintering from a mixture of 3 mol% Y_2O_3-ZrO_2, La(Fe_<0.9>Al_<0.1>)O_3, Fe_2O_3, Al_2O_3 and CoO powders. Platelike La{Co_<0.5>Fe_<0.5>(Fe_<0.9>Al_<0.1>)_<11>}O_<19> crystals were grown stably in a 3Y-TZP matrix over a temperature range of 1200 to 1325°C, which is wider than that of La(Fe, Al)_<12>O_<19>. Vickers hardness was 9.0 GPa for the composite sintered from 1150 to 1325°C. 3Y-TZP/20 mass% La{Co_<0.5>Fe_<0.5>(Fe_<0.9>Al_<0.1>)_<11>}O_<19> composite, which was sintered at 1325°C, exhibited a fracture strength of 630 MPa. The composite which was sintered from 1200 to 1325°C exhibited a constant saturation magnetization of 7.2 emu/g. The composite which was sintered at 1225°C exhibited a maximum coercivity of 3.8 kOe.
社団法人日本セラミックス協会の論文
1999-09-01