Experimental determination of 800℃ isothermal section in Al-Zn-Zr ternary system  

Al-Zn-Zr三元系800℃等温截面的实验测定（英文）

作　　者：Yong-xiong LIU Fu-cheng YIN Zhi LI Xue-mei OUYANG Liang-ping CHEN 刘永雄;尹付成;李智;欧阳雪枚;陈亮平(湘潭大学材料科学与工程学院,湘潭411105;湘潭大学材料设计及制备技术湖南省重点实验室,湘潭411105)

机构地区：[1]School of Materials Science and Engineering, Xiangtan University, Xiangtan 411105, China [2]Key Laboratory of Materials Design and Preparation Technology of Hunan Province, Xiangtan University, Xiangtan 411105, China

出　　处：《Transactions of Nonferrous Metals Society of China》2019年第1期25-33,共9页中国有色金属学报（英文版）

基　　金：Projects(51771160,51471140)supported by the National Natural Science Foundation of China

摘　　要：The 800℃ isothermal section in the Al-Zn-Zr system was investigated using the equilibrated alloy method and the solid/liquid diffusion couple approach by means of scanning electron microscopy equipped with energy dispersive spectroscopy, X-ray powder diffraction and electron probe microanalysis. Thirteen three-phase regions are experimentally confirmed in the ternary system. A ternary compound Zn50Al25Zr25 named as T phase exists stably in the 800℃ isothermal section. Its composition range varies widely (16.84-55.1 at.% Zn, 18.02-56.3 at.% Al and 26.0-28.53 at.% Zr), and it can be in equilibrium with all the binary compounds. The maximum solubilities of Zn in Zr3Al, Zr2Al, Zr3Al2, Zr4Al3, ZrAl, Zr2Al3, ZrAl2 and ZrAl3 are 7.5, 0.84, 0.33, 0.89, 0.91, 1.12, 0.64 and 3.8 at.%, respectively. The maximum solubilities of Al in Zn3Zr, Zn2Zr and ZnZr are 1.6, 1.3 and 13.6 at.%, respectively.利用扩散偶和平衡合金法,采用扫描电镜-能谱、X射线衍射和电子探针分析方法对Al-Zn-Zr三元系800℃等温截面进行实验测定。实验确定了13个三相区;三元化合物Zn_(50)Al_(25)Zr_(25)(T相)稳定存在于此等温截面,拥有比较大的成分区间(16.84%～55.1%Zn、18.02%～56.3%Al和26.0%～28.53%Zr,摩尔分数),并能与该体系中所有的二元化合物平衡共存。Zn在Zr-Al化合物Zr_3Al、Zr_2Al、Zr_3Al_2、Zr_4Al_3、ZrAl、Zr_2Al_3、Zr l_2和ZrAl_3中最大溶解度分别是7.5%、0.84%、0.33%、0.89%、0.91%、1.12%、0.64%和3.8%(摩尔分数);Al在Zn-Zr化合物Zn_3Zr、Zn_2Zr和ZnZr中最大溶解度分别是1.6%、1.3%和13.6%(摩尔分数)。

关 键 词：Al-Zn-Zr system phase diagram Zn50Al25Zr25 SEM-EDS EPMA 

分 类 号：TG146.21[一般工业技术—材料科学与工程]