摘要
The phase relationships in the Zn-Al-Ti system at 450 and 600℃ were experimentally determined using equilibrated alloys method.The specimens were investigated by means of scanning electron microscopy coupled with energy dispersive spectroscopy and X-ray diffractometry.Eleven and eight three-phase regions are confirmed in the 450 and 600℃ isothermal sections,respectively.The Ti2Al5 which only exists at high temperature(990-1199.4℃)in Ti-Al binary system is confirmed in two isothermal sections due to the dissolution of zinc.The T phase is confirmed as a ternary compound rather than an extension phase of TiZn3 at 450℃.The T2 phase is a new ternary phase stable at 450 and 600℃ in Zn-Al-Ti ternary system.
通过平衡合金法实验确定Zn-Al-Ti三元系450和600℃等温截面的相关系。采用扫描电镜?能谱仪以及X射线衍射对样品进行分析。在450和600℃等温截面中分别存在7和8个三相区,由于锌在Ti2Al5相中的溶解,使得仅在高温下(990~1199.4℃)存在的Ti2Al5相能够在较低温度下稳定存在。450℃等温截面中的T相并非TiZn3的延伸相,而是一个三元化合物。T2相是Zn-Al-Ti三元体系中一个新的三元相,并且在450和600℃下稳定存在。
基金
Project(51971189)supported by the National Natural Science Foundation of China
Project(2019JJ60011)supported by Zhuzhou Joint Fund of Hunan Natural Science Foundation,China
Project(KFBM20180001)supported by Jiangsu Key Laboratory of Materials Surface Science and Technology(Changzhou University),China。
