Change law of real vapor pressure of Al element in Ti-xAl (x=25～50) melt during ISM process

• 作 者: 刘贵仲\\r\\r\\r\\r\\r\\r\\r\\r\\r\\n 苏彦庆\\r\\r\\r\\r\\r\\r\\r\\r\\r\\n 郭景杰\\r\\r\\r\\r\\r\\r\\r\\r\\r\\n 丁宏升\\r\\r\\r\\r\\r\\r\\r
• 出 处: Transactions of Nonferrous Metals Society of China
• 发表日期: 2002年02期

A new model was established to calculate the real vapor pressure of the Al element in the molten Ti x Al ( x = 25 ～ 50, mole fraction, %) alloy. The effects of the holding time, chamber pressure, mole fraction of Al and melting temperature on the real vapor pressure of Al element in the vacuum chamber were analyzed. Because of the impeding effect of the real vapor pressure on the evaporation loss rate, within a short time (less than 10?s), the real vapor pressure tends to a constant value. When the chamber pressure is less than the saturated vapor pressure of the Al component, the real vapor pressure of Al is equal to the chamber pressure. While when the chamber pressure is larger than the saturated vapor pressure, the real vapor pressure is equal to the saturated vapor pressure of the Al element of the same condition.

A new model was established to calculate the real vapor pressure of the Al element in the molten Ti x Al (x = 25-50, mole fraction,%) alloy. The effects of the holding time, chamber pressure, mole fraction of Al and melting temperature on the real vapor pressure of Al element in the vacuum chamber were analyzed. Because of the impeding effect of the real vapor pressure on the evaporation loss rate, within a short time (less than 10? s) When the chamber pressure is less than the saturated vapor pressure of the Al component, the real vapor pressure of Al is equal to the chamber pressure. While the chamber pressure is larger than the saturated vapor pressure, the real vapor pressure is equal to the saturated vapor pressure of the Al element of the same condition.