セラミックとアルミニウム合金の接合強度に対する熱応力緩衝構造および時効処理の影響

抄録

The conditions of a solution treatment and a water quenching and the structure of a buffer layer for thermal stress were investigated in the joining of A2024 to ZrO₂ using Al–13.6Cu–2.4Si–50Zn brazing filler metal. The prevention of the ceramic crack by heat shock and aging treatment became possible for the joining of A2024 to ZrO₂ by the partial water quenching after solution treatment. The hardness of A2024 aluminum alloy under the joining interface reached to 72HRB, which was converted into 450 MPa of tensile strength of the alloy. A5052 and A1050 buffer layers were inserted between ZrO₂ and A2024 in order to decrease the thermal stress, so that the joint strength was obtained about 200 MPa after the aging. The joint strength of the A2024/Si₃N₄ joint was obtained about 180 MPa. These A2024/ceramic joints had enough joint strength and enough tensile strength of A2024 alloy part that are applicable for various structural components.