Ti—Al—Si三元系中β－Ti（Al，Si）和Ti_5（Si，Al）_3的共晶线

The β-Ti(Al, Si)+Ti_5(Si, Al)_3 Eutectic Line in the Ti-Al-Si Ternary System

通过试验确定了Ｔｉ－Ａｌ－Ｓｉ三元相图中富Ｔｉ角区域的β－Ｔｉ（Ａｌ，Ｓｉ）与Ｔｉ５（Ｓｉ，Ａｌ）３共晶线．用光学金相、Ｘ射线衍射、电子显微镜等方法研究共品组织以及共晶组织中基体和第二相Ｔｉ５（Ｓｉ，Ａｌ）３。所有这些工作是为了在双相合金的合金设计中能合理地选择合金成分．

The eutcctic line of β--Ti(Al, Si) and Ti5(Si, Al)3 across the Ti -- rich corner of theTi -- Al --Si ternary diagram is determined by experiments. The cutectic microstructuresand the matrix as well as the second phase Ti5(Si, Al)3 are characterized rcspcctivclyby mctalography, X -- ray diffraction and electron microscopy. The determination of β -- Ti(Al, Si) +Ti5 (Si, Al) 3 eutectic line provided valuable informations for us to selectcompositions when a dual phase alloy is to be designed.