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作者研究了包括Ti_3Al、TiAl等金属间化合物在内的Ti-Al合金在600～1100℃下于一个大气压的干燥氧气中的氧化行为,并用热重法研究了氧化物的生长动力学。用扫描电子显微镜和能量弥散X射线衍射分析了合金表层氧化附着物的断面微结构。从抛物线形的增重曲线得到了氧化速度曲线,根据它们与温度的相关性,测定了氧化反应的有效活化能。随着合金中铝含量的增加,氧化附着物中的A1.2O_3含量也增加,并形成主要由A1_2O_3构成的次层。与非合金化的钦比较,TiAl上的附着物更坚
The authors investigated the oxidation behavior of Ti-Al alloys, including Ti3Al, TiAl and other intermetallic compounds, at one atmosphere of dry oxygen at 600-1100C and investigated the growth kinetics of the oxides by thermogravimetry. The microstructure of the oxide deposit on the surface of the alloy was analyzed by scanning electron microscopy and energy dispersive X-ray diffraction. The oxidation rate curves were obtained from the parabolic weight gain curve. The effective activation energy of the oxidation reaction was determined based on their correlation with temperature. With the increase of aluminum content in the alloy, the content of A1.2O3 in the oxide deposit also increased, and the sub-layer mainly composed of A1_2O_3 was formed. Compared with non-alloying Qin, TiAl on the attachment more solid