Ti-Mn-Si三元系相图富Ti端800及1100℃等温截面的测定  

Measurements of Isothermal Sections in the Ti-rich Region of Ti-Mn-Si Ternary System at 800℃and 1100℃

作　　者：申涛 鲁晓刚[1,2] 王静静 SHEN Tao;LU Xiaogang;WANG Jingjing(School of Materials Science and Engineering, Shanghai University, Shanghai 200444, China;Materials Genome Institute, Shanghai University, Shanghai 200444, China)

机构地区：[1]上海大学材料科学与工程学院,上海200444 [2]上海大学材料基因组工程研究院,上海200444

出　　处：《上海金属》2020年第2期105-110,共6页Shanghai Metals

基　　金：国家重点研发计划(No.2017YFB0703000)。

摘　　要：采用合金法,利用电子探针显微分析(EPMA)及X射线衍射法(XRD),试验测定了Ti-Mn-Si三元系合金相图富Ti端800及1100℃等温截面中的相关系。结合试验数据和已知子二元系相图,发现Ti-Mn-Si三元系富Ti端800℃时存在3个三相区:BCC(Ti)+HCP(Ti)+SiTi3、BCC(Ti)+Si3Ti5+SiTi3、BCC(Ti)+Si3Ti5+X(X为三元新相);4个两相区:BCC(Ti)+Si3Ti5、BCC(Ti)+SiTi3、HCP(Ti)+SiTi3、HCP(Ti)+BCC(Ti);2个单相区:BCC(Ti)、HCP(Ti)。富Ti端1100℃时存在2个三相区:BCC(Ti)+Si3Ti5+SiTi3、BCC(Ti)+Si3Ti5+X;2个两相区:BCC(Ti)+Si3Ti5、BCC(Ti)+SiTi3;1个单相区BCC(Ti)。Isothermal sections of the Ti-Mn-Si ternary system in the Ti-rich region at 800℃and 1100℃were experimentally determined through alloyage in conjunction with electron probe micro-analysis(EPMA)and X-ray diffraction(XRD).Combining experimental data with known binary phase diagrams,the phase equilibria of the Ti-Mn-Si ternary system in the Ti-rich region at 800℃were determined as follows:three three-phase regions,i.e.,BCC(Ti)+HCP(Ti)+SiTi3,BCC(Ti)+Si3Ti5+SiTi3,BCC(Ti)+Si3Ti5+X(X is a new ternary phase);four two-phase regions,i.e.,BCC(Ti)+Si3Ti5,BCC(Ti)+SiTi3,SiTi3+HCP(Ti),HCP(Ti)+BCC(Ti),and two single-phase regions,i.e.,BCC(Ti),HCP(Ti).At 1100℃,the following phase equilibria were detected as follows:two three-phase regions,i.e.,BCC(Ti)+Si3Ti5+SiTi3,BCC(Ti)+Si3Ti5+X;two two-phase regions,i.e.,BCC(Ti)+Si3Ti5,BCC(Ti)+SiTi3,and one single-phase region BCC(Ti).

关 键 词：钛锰硅合金 三元系 相图 等温截面 

分 类 号：TB3[一般工业技术—材料科学与工程]