Shear Strength Evaluation of Al2O3/SUS 304 Joints at Elevated Temperatures.

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  • アルミナ／ＳＵＳ３０４鋼接合体の高温せん断強度特性評価
  • アルミナ SUS 304 コウ セツゴウタイ ノ コウオン センダン キョウド トクセイ ヒョウカ

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This paper describes strength evaluation of Al2O3/SUS 304 joints subjected to interlaminer shear at elevated temperatures. The jig developed enables us to evaluate shear strengths of ceramics/metal joints at elevated temperatures. The shear strengths of them decrease with increasing temperature. The crack generally initiates at the upper and lower sides of the interface, a brazing filler. It grows into Al2O3 after stable growth and becomes unstable till 873 K (I C type fracture). The crack propagates along the interface till unstable fracture from 1 173 K (II type fracture). The crack behavior shows a mixed mode of I C and II types at 973 K and 1 073 K (IC+II type fracture). Larson Miller Parameter is valid for creep rapture tests under shear loading. The fracture modes are the I C type under the condition of low temperature and short time and the II type under the long-term condition.

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